./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_lazy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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_lazy.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 b26873cfd586f35040b8fa56225beaa479db089ab89500d17d6395862bf9072f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:42:44,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:42:44,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:42:44,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:42:44,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:42:44,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:42:44,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:42:44,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:42:44,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:42:44,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:42:44,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:42:44,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:42:44,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:42:44,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:42:44,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:42:44,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:42:44,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:42:44,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:42:44,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:42:44,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:42:44,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:42:44,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:42:44,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:42:44,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:42:44,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:42:44,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:42:44,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:42:44,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:42:44,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:42:44,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:42:44,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:42:44,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:42:44,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:42:44,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:42:44,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:42:44,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:42:44,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:42:44,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:42:44,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:42:44,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:42:44,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:42:44,078 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:42:44,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:42:44,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:42:44,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:42:44,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:42:44,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:42:44,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:42:44,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:42:44,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:42:44,115 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:42:44,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:42:44,115 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:42:44,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:42:44,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:42:44,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:42:44,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:42:44,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:42:44,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:42:44,116 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:42:44,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:42:44,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:42:44,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:42:44,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:42:44,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:42:44,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:42:44,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:42:44,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:42:44,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:42:44,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:42:44,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:42:44,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:42:44,118 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:42:44,119 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:42:44,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:42:44,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:42:44,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b26873cfd586f35040b8fa56225beaa479db089ab89500d17d6395862bf9072f [2021-12-15 11:42:44,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:42:44,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:42:44,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:42:44,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:42:44,366 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:42:44,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_lazy.i [2021-12-15 11:42:44,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b459240dd/8f8a884cbd0e411bb4a437f77621f9bc/FLAGe85d01d23 [2021-12-15 11:42:44,822 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:42:44,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_lazy.i [2021-12-15 11:42:44,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b459240dd/8f8a884cbd0e411bb4a437f77621f9bc/FLAGe85d01d23 [2021-12-15 11:42:44,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b459240dd/8f8a884cbd0e411bb4a437f77621f9bc [2021-12-15 11:42:44,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:42:44,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:42:44,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:42:44,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:42:44,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:42:44,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:42:44" (1/1) ... [2021-12-15 11:42:44,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b9c7a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:44, skipping insertion in model container [2021-12-15 11:42:44,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:42:44" (1/1) ... [2021-12-15 11:42:44,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:42:44,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:42:45,155 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_lazy.i[23394,23407] [2021-12-15 11:42:45,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:42:45,258 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:42:45,278 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_lazy.i[23394,23407] [2021-12-15 11:42:45,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:42:45,333 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:42:45,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45 WrapperNode [2021-12-15 11:42:45,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:42:45,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:42:45,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:42:45,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:42:45,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,384 INFO L137 Inliner]: procedures = 145, calls = 212, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 514 [2021-12-15 11:42:45,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:42:45,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:42:45,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:42:45,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:42:45,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:42:45,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:42:45,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:42:45,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:42:45,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (1/1) ... [2021-12-15 11:42:45,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:42:45,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:42:45,534 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) [2021-12-15 11:42:45,605 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 [2021-12-15 11:42:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 11:42:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 11:42:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:42:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 11:42:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 11:42:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2021-12-15 11:42:45,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2021-12-15 11:42:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-12-15 11:42:45,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-12-15 11:42:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 11:42:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-12-15 11:42:45,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-12-15 11:42:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-15 11:42:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-15 11:42:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 11:42:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 11:42:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-12-15 11:42:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-12-15 11:42:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:42:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2021-12-15 11:42:45,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2021-12-15 11:42:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:42:45,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:42:45,807 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:42:45,808 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:42:45,985 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume 0 != ~__CS_ret~0 % 256;thread3_#res#1.base, thread3_#res#1.offset := 0, 0; [2021-12-15 11:42:45,986 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##31: assume !(0 != ~__CS_ret~0 % 256); [2021-12-15 11:42:45,986 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##30: assume 0 != ~__CS_ret~0 % 256;thread3_#res#1.base, thread3_#res#1.offset := 0, 0; [2021-12-15 11:42:45,986 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !(0 != ~__CS_ret~0 % 256); [2021-12-15 11:42:45,986 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L714: SUMMARY for call __CS_cs(); srcloc: null [2021-12-15 11:42:45,986 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L714-1: assume 0 != ~__CS_ret~0 % 256;thread3_#res#1.base, thread3_#res#1.offset := 0, 0; [2021-12-15 11:42:45,986 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L714-1: assume !(0 != ~__CS_ret~0 % 256); [2021-12-15 11:42:48,220 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:42:48,227 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:42:48,232 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 11:42:48,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:42:48 BoogieIcfgContainer [2021-12-15 11:42:48,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:42:48,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:42:48,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:42:48,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:42:48,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:42:44" (1/3) ... [2021-12-15 11:42:48,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76616469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:42:48, skipping insertion in model container [2021-12-15 11:42:48,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:45" (2/3) ... [2021-12-15 11:42:48,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76616469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:42:48, skipping insertion in model container [2021-12-15 11:42:48,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:42:48" (3/3) ... [2021-12-15 11:42:48,272 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_lazy.i [2021-12-15 11:42:48,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:42:48,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:42:48,342 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:42:48,349 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 [2021-12-15 11:42:48,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:42:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 119 states have (on average 1.495798319327731) internal successors, (178), 120 states have internal predecessors, (178), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:42:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 11:42:48,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:42:48,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:42:48,387 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:42:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:42:48,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1643557001, now seen corresponding path program 1 times [2021-12-15 11:42:48,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:42:48,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089767034] [2021-12-15 11:42:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:42:48,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:42:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:42:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:42:48,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:42:48,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089767034] [2021-12-15 11:42:48,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089767034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:42:48,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:42:48,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:42:48,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084841278] [2021-12-15 11:42:48,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:42:48,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:42:48,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:42:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:42:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:42:48,734 INFO L87 Difference]: Start difference. First operand has 164 states, 119 states have (on average 1.495798319327731) internal successors, (178), 120 states have internal predecessors, (178), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:42:48,803 INFO L93 Difference]: Finished difference Result 331 states and 539 transitions. [2021-12-15 11:42:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:42:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 11:42:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:42:48,819 INFO L225 Difference]: With dead ends: 331 [2021-12-15 11:42:48,819 INFO L226 Difference]: Without dead ends: 165 [2021-12-15 11:42:48,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:42:48,827 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 5 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:42:48,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 464 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:42:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-15 11:42:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-12-15 11:42:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 117 states have internal predecessors, (160), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:42:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 234 transitions. [2021-12-15 11:42:48,866 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 234 transitions. Word has length 34 [2021-12-15 11:42:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:42:48,867 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 234 transitions. [2021-12-15 11:42:48,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 234 transitions. [2021-12-15 11:42:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 11:42:48,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:42:48,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:42:48,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:42:48,869 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:42:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:42:48,870 INFO L85 PathProgramCache]: Analyzing trace with hash -883018881, now seen corresponding path program 1 times [2021-12-15 11:42:48,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:42:48,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136399942] [2021-12-15 11:42:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:42:48,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:42:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:42:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:42:48,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:42:48,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136399942] [2021-12-15 11:42:48,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136399942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:42:48,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:42:48,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:42:48,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011263510] [2021-12-15 11:42:48,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:42:48,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:42:48,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:42:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:42:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:42:48,945 INFO L87 Difference]: Start difference. First operand 161 states and 234 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:42:48,978 INFO L93 Difference]: Finished difference Result 321 states and 468 transitions. [2021-12-15 11:42:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:42:48,979 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 11:42:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:42:48,981 INFO L225 Difference]: With dead ends: 321 [2021-12-15 11:42:48,981 INFO L226 Difference]: Without dead ends: 163 [2021-12-15 11:42:48,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:42:48,983 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 1 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 459 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 [2021-12-15 11:42:48,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 459 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:42:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-15 11:42:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-12-15 11:42:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 118 states have (on average 1.3644067796610169) internal successors, (161), 118 states have internal predecessors, (161), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:42:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 235 transitions. [2021-12-15 11:42:49,006 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 235 transitions. Word has length 38 [2021-12-15 11:42:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:42:49,007 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 235 transitions. [2021-12-15 11:42:49,007 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 235 transitions. [2021-12-15 11:42:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:42:49,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:42:49,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:42:49,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:42:49,009 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:42:49,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:42:49,010 INFO L85 PathProgramCache]: Analyzing trace with hash -786448707, now seen corresponding path program 1 times [2021-12-15 11:42:49,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:42:49,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569473559] [2021-12-15 11:42:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:42:49,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:42:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:42:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:42:49,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:42:49,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569473559] [2021-12-15 11:42:49,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569473559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:42:49,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281983889] [2021-12-15 11:42:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:42:49,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:42:49,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:42:49,092 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) [2021-12-15 11:42:49,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 11:42:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:42:49,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 11:42:49,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:42:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:42:49,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:42:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:42:49,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281983889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:42:49,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:42:49,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 11:42:49,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015647555] [2021-12-15 11:42:49,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:42:49,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:42:49,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:42:49,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:42:49,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:42:49,595 INFO L87 Difference]: Start difference. First operand 162 states and 235 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:42:49,624 INFO L93 Difference]: Finished difference Result 327 states and 476 transitions. [2021-12-15 11:42:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:42:49,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 11:42:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:42:49,627 INFO L225 Difference]: With dead ends: 327 [2021-12-15 11:42:49,627 INFO L226 Difference]: Without dead ends: 168 [2021-12-15 11:42:49,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:42:49,628 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 6 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:42:49,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 687 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:42:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-15 11:42:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-15 11:42:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 124 states have (on average 1.346774193548387) internal successors, (167), 124 states have internal predecessors, (167), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:42:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2021-12-15 11:42:49,639 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 40 [2021-12-15 11:42:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:42:49,639 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2021-12-15 11:42:49,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2021-12-15 11:42:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 11:42:49,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:42:49,640 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:42:49,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 11:42:49,858 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 [2021-12-15 11:42:49,859 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:42:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:42:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash 386454391, now seen corresponding path program 2 times [2021-12-15 11:42:49,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:42:49,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711304611] [2021-12-15 11:42:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:42:49,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:42:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:42:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 11:42:49,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:42:49,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711304611] [2021-12-15 11:42:49,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711304611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:42:49,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717054213] [2021-12-15 11:42:49,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 11:42:49,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:42:49,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:42:49,948 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) [2021-12-15 11:42:49,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 11:42:50,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 11:42:50,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 11:42:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 11:42:50,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:42:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 11:42:50,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 11:42:50,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717054213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:42:50,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 11:42:50,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 11:42:50,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239990471] [2021-12-15 11:42:50,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:42:50,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:42:50,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:42:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:42:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:42:50,359 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:42:50,403 INFO L93 Difference]: Finished difference Result 318 states and 470 transitions. [2021-12-15 11:42:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:42:50,404 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-15 11:42:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:42:50,407 INFO L225 Difference]: With dead ends: 318 [2021-12-15 11:42:50,408 INFO L226 Difference]: Without dead ends: 292 [2021-12-15 11:42:50,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:42:50,412 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 190 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:42:50,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 807 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:42:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-15 11:42:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-12-15 11:42:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 205 states have (on average 1.395121951219512) internal successors, (286), 205 states have internal predecessors, (286), 73 states have call successors, (73), 12 states have call predecessors, (73), 12 states have return successors, (82), 73 states have call predecessors, (82), 73 states have call successors, (82) [2021-12-15 11:42:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 441 transitions. [2021-12-15 11:42:50,452 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 441 transitions. Word has length 46 [2021-12-15 11:42:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:42:50,452 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 441 transitions. [2021-12-15 11:42:50,452 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 441 transitions. [2021-12-15 11:42:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 11:42:50,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:42:50,460 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2021-12-15 11:42:50,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 11:42:50,678 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 [2021-12-15 11:42:50,679 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:42:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:42:50,680 INFO L85 PathProgramCache]: Analyzing trace with hash -413357882, now seen corresponding path program 1 times [2021-12-15 11:42:50,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:42:50,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691273232] [2021-12-15 11:42:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:42:50,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:42:50,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:42:50,709 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 11:42:50,713 INFO L158 Benchmark]: Toolchain (without parser) took 5852.62ms. Allocated memory was 90.2MB in the beginning and 178.3MB in the end (delta: 88.1MB). Free memory was 48.9MB in the beginning and 69.0MB in the end (delta: -20.1MB). Peak memory consumption was 70.7MB. Max. memory is 16.1GB. [2021-12-15 11:42:50,713 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory is still 67.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:42:50,713 INFO L158 Benchmark]: CACSL2BoogieTranslator took 469.35ms. Allocated memory was 90.2MB in the beginning and 130.0MB in the end (delta: 39.8MB). Free memory was 48.7MB in the beginning and 91.3MB in the end (delta: -42.6MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2021-12-15 11:42:50,714 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.87ms. Allocated memory is still 130.0MB. Free memory was 91.3MB in the beginning and 87.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 11:42:50,714 INFO L158 Benchmark]: Boogie Preprocessor took 86.50ms. Allocated memory is still 130.0MB. Free memory was 87.1MB in the beginning and 82.2MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 11:42:50,714 INFO L158 Benchmark]: RCFGBuilder took 2761.61ms. Allocated memory is still 130.0MB. Free memory was 82.2MB in the beginning and 97.6MB in the end (delta: -15.4MB). Peak memory consumption was 55.3MB. Max. memory is 16.1GB. [2021-12-15 11:42:50,714 INFO L158 Benchmark]: TraceAbstraction took 2476.91ms. Allocated memory was 130.0MB in the beginning and 178.3MB in the end (delta: 48.2MB). Free memory was 97.6MB in the beginning and 69.0MB in the end (delta: 28.6MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. [2021-12-15 11:42:50,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory is still 67.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 469.35ms. Allocated memory was 90.2MB in the beginning and 130.0MB in the end (delta: 39.8MB). Free memory was 48.7MB in the beginning and 91.3MB in the end (delta: -42.6MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.87ms. Allocated memory is still 130.0MB. Free memory was 91.3MB in the beginning and 87.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.50ms. Allocated memory is still 130.0MB. Free memory was 87.1MB in the beginning and 82.2MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2761.61ms. Allocated memory is still 130.0MB. Free memory was 82.2MB in the beginning and 97.6MB in the end (delta: -15.4MB). Peak memory consumption was 55.3MB. Max. memory is 16.1GB. * TraceAbstraction took 2476.91ms. Allocated memory was 130.0MB in the beginning and 178.3MB in the end (delta: 48.2MB). Free memory was 97.6MB in the beginning and 69.0MB in the end (delta: 28.6MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 11:42:50,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_lazy.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 b26873cfd586f35040b8fa56225beaa479db089ab89500d17d6395862bf9072f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:42:52,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:42:52,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:42:52,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:42:52,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:42:52,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:42:52,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:42:52,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:42:52,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:42:52,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:42:52,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:42:52,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:42:52,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:42:52,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:42:52,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:42:52,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:42:52,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:42:52,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:42:52,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:42:52,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:42:52,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:42:52,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:42:52,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:42:52,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:42:52,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:42:52,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:42:52,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:42:52,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:42:52,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:42:52,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:42:52,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:42:52,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:42:52,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:42:52,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:42:52,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:42:52,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:42:52,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:42:52,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:42:52,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:42:52,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:42:52,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:42:52,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 11:42:52,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:42:52,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:42:52,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:42:52,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:42:52,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:42:52,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:42:52,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:42:52,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:42:52,633 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:42:52,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:42:52,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:42:52,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:42:52,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:42:52,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:42:52,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:42:52,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:42:52,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 11:42:52,635 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 11:42:52,635 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 11:42:52,635 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:42:52,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:42:52,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:42:52,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:42:52,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:42:52,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:42:52,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:42:52,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:42:52,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:42:52,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:42:52,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:42:52,637 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 11:42:52,637 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 11:42:52,637 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:42:52,637 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:42:52,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:42:52,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:42:52,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 11:42:52,638 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b26873cfd586f35040b8fa56225beaa479db089ab89500d17d6395862bf9072f [2021-12-15 11:42:52,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:42:52,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:42:52,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:42:52,928 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:42:52,929 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:42:52,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_lazy.i [2021-12-15 11:42:52,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccf36320/aedcada4d2be4dab91627d8af1d5a588/FLAG1a925a894 [2021-12-15 11:42:53,500 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:42:53,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_lazy.i [2021-12-15 11:42:53,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccf36320/aedcada4d2be4dab91627d8af1d5a588/FLAG1a925a894 [2021-12-15 11:42:53,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccf36320/aedcada4d2be4dab91627d8af1d5a588 [2021-12-15 11:42:53,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:42:53,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:42:53,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:42:53,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:42:53,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:42:53,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:42:53" (1/1) ... [2021-12-15 11:42:53,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae86abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:53, skipping insertion in model container [2021-12-15 11:42:53,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:42:53" (1/1) ... [2021-12-15 11:42:53,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:42:54,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:42:54,218 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_lazy.i[23394,23407] [2021-12-15 11:42:54,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:42:54,327 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:42:54,346 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_lazy.i[23394,23407] [2021-12-15 11:42:54,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:42:54,401 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:42:54,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54 WrapperNode [2021-12-15 11:42:54,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:42:54,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:42:54,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:42:54,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:42:54,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,490 INFO L137 Inliner]: procedures = 149, calls = 212, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 501 [2021-12-15 11:42:54,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:42:54,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:42:54,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:42:54,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:42:54,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:42:54,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:42:54,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:42:54,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:42:54,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (1/1) ... [2021-12-15 11:42:54,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:42:54,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:42:54,656 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) [2021-12-15 11:42:54,660 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 [2021-12-15 11:42:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-15 11:42:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-15 11:42:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:42:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 11:42:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 11:42:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2021-12-15 11:42:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2021-12-15 11:42:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-12-15 11:42:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-12-15 11:42:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 11:42:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-12-15 11:42:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-12-15 11:42:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-15 11:42:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-15 11:42:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-15 11:42:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 11:42:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-15 11:42:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 11:42:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 11:42:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-15 11:42:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-12-15 11:42:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-12-15 11:42:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2021-12-15 11:42:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2021-12-15 11:42:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:42:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:42:54,930 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:42:54,931 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:42:55,218 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);thread3_#res#1.base, thread3_#res#1.offset := 0bv32, 0bv32; [2021-12-15 11:42:55,219 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##31: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-12-15 11:42:55,219 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##30: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);thread3_#res#1.base, thread3_#res#1.offset := 0bv32, 0bv32; [2021-12-15 11:42:55,219 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-12-15 11:42:55,219 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L714: SUMMARY for call __CS_cs(); srcloc: null [2021-12-15 11:42:55,219 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L714-1: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);thread3_#res#1.base, thread3_#res#1.offset := 0bv32, 0bv32; [2021-12-15 11:42:55,219 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L714-1: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-12-15 11:42:57,628 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:42:57,634 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:42:57,634 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 11:42:57,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:42:57 BoogieIcfgContainer [2021-12-15 11:42:57,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:42:57,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:42:57,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:42:57,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:42:57,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:42:53" (1/3) ... [2021-12-15 11:42:57,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a90a347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:42:57, skipping insertion in model container [2021-12-15 11:42:57,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:42:54" (2/3) ... [2021-12-15 11:42:57,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a90a347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:42:57, skipping insertion in model container [2021-12-15 11:42:57,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:42:57" (3/3) ... [2021-12-15 11:42:57,641 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_lazy.i [2021-12-15 11:42:57,644 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:42:57,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:42:57,687 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:42:57,695 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 [2021-12-15 11:42:57,696 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:42:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 119 states have (on average 1.495798319327731) internal successors, (178), 120 states have internal predecessors, (178), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:42:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 11:42:57,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:42:57,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:42:57,733 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:42:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:42:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1643557001, now seen corresponding path program 1 times [2021-12-15 11:42:57,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:42:57,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774755206] [2021-12-15 11:42:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:42:57,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:42:57,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:42:57,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 11:42:57,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 11:42:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:42:58,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 11:42:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:42:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:42:58,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 11:42:58,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 11:42:58,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774755206] [2021-12-15 11:42:58,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774755206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:42:58,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:42:58,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:42:58,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748065844] [2021-12-15 11:42:58,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:42:58,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:42:58,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 11:42:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:42:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:42:58,263 INFO L87 Difference]: Start difference. First operand has 164 states, 119 states have (on average 1.495798319327731) internal successors, (178), 120 states have internal predecessors, (178), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:42:58,323 INFO L93 Difference]: Finished difference Result 326 states and 530 transitions. [2021-12-15 11:42:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:42:58,325 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 11:42:58,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:42:58,331 INFO L225 Difference]: With dead ends: 326 [2021-12-15 11:42:58,337 INFO L226 Difference]: Without dead ends: 160 [2021-12-15 11:42:58,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:42:58,345 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:42:58,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:42:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-15 11:42:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-15 11:42:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 116 states have (on average 1.3706896551724137) internal successors, (159), 116 states have internal predecessors, (159), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:42:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 233 transitions. [2021-12-15 11:42:58,382 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 233 transitions. Word has length 34 [2021-12-15 11:42:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:42:58,382 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 233 transitions. [2021-12-15 11:42:58,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 233 transitions. [2021-12-15 11:42:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 11:42:58,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:42:58,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:42:58,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 11:42:58,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 11:42:58,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:42:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:42:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash 819536951, now seen corresponding path program 1 times [2021-12-15 11:42:58,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:42:58,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15161905] [2021-12-15 11:42:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:42:58,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:42:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:42:58,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 11:42:58,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 11:42:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:42:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 11:42:58,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:42:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:42:59,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 11:42:59,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 11:42:59,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15161905] [2021-12-15 11:42:59,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15161905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:42:59,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:42:59,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:42:59,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012334834] [2021-12-15 11:42:59,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:42:59,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:42:59,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 11:42:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:42:59,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:42:59,005 INFO L87 Difference]: Start difference. First operand 160 states and 233 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:42:59,113 INFO L93 Difference]: Finished difference Result 318 states and 464 transitions. [2021-12-15 11:42:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:42:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 11:42:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:42:59,119 INFO L225 Difference]: With dead ends: 318 [2021-12-15 11:42:59,119 INFO L226 Difference]: Without dead ends: 165 [2021-12-15 11:42:59,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:42:59,121 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 5 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:42:59,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 456 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:42:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-15 11:42:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-12-15 11:42:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 117 states have internal predecessors, (160), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:42:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 234 transitions. [2021-12-15 11:42:59,134 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 234 transitions. Word has length 34 [2021-12-15 11:42:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:42:59,134 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 234 transitions. [2021-12-15 11:42:59,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 234 transitions. [2021-12-15 11:42:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 11:42:59,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:42:59,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:42:59,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 11:42:59,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 11:42:59,346 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:42:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:42:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash -883018881, now seen corresponding path program 1 times [2021-12-15 11:42:59,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:42:59,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828238284] [2021-12-15 11:42:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:42:59,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:42:59,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:42:59,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 11:42:59,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 11:42:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:42:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 11:42:59,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:42:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:42:59,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 11:42:59,718 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 11:42:59,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828238284] [2021-12-15 11:42:59,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828238284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:42:59,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:42:59,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:42:59,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066266166] [2021-12-15 11:42:59,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:42:59,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:42:59,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 11:42:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:42:59,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:42:59,725 INFO L87 Difference]: Start difference. First operand 161 states and 234 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:59,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:42:59,784 INFO L93 Difference]: Finished difference Result 321 states and 468 transitions. [2021-12-15 11:42:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:42:59,787 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 11:42:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:42:59,789 INFO L225 Difference]: With dead ends: 321 [2021-12-15 11:42:59,789 INFO L226 Difference]: Without dead ends: 163 [2021-12-15 11:42:59,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:42:59,791 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 1 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 459 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 [2021-12-15 11:42:59,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 459 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:42:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-15 11:42:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-12-15 11:42:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 118 states have (on average 1.3644067796610169) internal successors, (161), 118 states have internal predecessors, (161), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:42:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 235 transitions. [2021-12-15 11:42:59,801 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 235 transitions. Word has length 38 [2021-12-15 11:42:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:42:59,801 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 235 transitions. [2021-12-15 11:42:59,801 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:42:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 235 transitions. [2021-12-15 11:42:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:42:59,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:42:59,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:42:59,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-15 11:43:00,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 11:43:00,015 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:43:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:43:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash -786448707, now seen corresponding path program 1 times [2021-12-15 11:43:00,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:43:00,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536427804] [2021-12-15 11:43:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:43:00,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:43:00,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:43:00,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 11:43:00,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-15 11:43:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:43:00,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 11:43:00,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:43:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:43:00,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:43:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:43:00,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 11:43:00,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536427804] [2021-12-15 11:43:00,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536427804] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:43:00,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 11:43:00,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-15 11:43:00,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699970982] [2021-12-15 11:43:00,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 11:43:00,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:43:00,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 11:43:00,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:43:00,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:43:00,472 INFO L87 Difference]: Start difference. First operand 162 states and 235 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:43:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:43:00,600 INFO L93 Difference]: Finished difference Result 327 states and 476 transitions. [2021-12-15 11:43:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:43:00,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 11:43:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:43:00,603 INFO L225 Difference]: With dead ends: 327 [2021-12-15 11:43:00,603 INFO L226 Difference]: Without dead ends: 168 [2021-12-15 11:43:00,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:43:00,604 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 4 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:43:00,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1143 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:43:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-15 11:43:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-15 11:43:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 124 states have (on average 1.346774193548387) internal successors, (167), 124 states have internal predecessors, (167), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:43:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2021-12-15 11:43:00,613 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 40 [2021-12-15 11:43:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:43:00,613 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2021-12-15 11:43:00,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:43:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2021-12-15 11:43:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 11:43:00,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:43:00,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:43:00,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-15 11:43:00,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 11:43:00,827 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:43:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:43:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash 386454391, now seen corresponding path program 2 times [2021-12-15 11:43:00,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:43:00,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309446337] [2021-12-15 11:43:00,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 11:43:00,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:43:00,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:43:00,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 11:43:00,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-15 11:43:01,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 11:43:01,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 11:43:01,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 11:43:01,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:43:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 11:43:01,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 11:43:01,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 11:43:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309446337] [2021-12-15 11:43:01,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309446337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:43:01,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:43:01,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:43:01,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565507276] [2021-12-15 11:43:01,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:43:01,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:43:01,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 11:43:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:43:01,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:43:01,207 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:43:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:43:01,233 INFO L93 Difference]: Finished difference Result 316 states and 457 transitions. [2021-12-15 11:43:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:43:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-15 11:43:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:43:01,235 INFO L225 Difference]: With dead ends: 316 [2021-12-15 11:43:01,235 INFO L226 Difference]: Without dead ends: 168 [2021-12-15 11:43:01,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:43:01,237 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 0 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 460 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 [2021-12-15 11:43:01,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 460 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:43:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-15 11:43:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-15 11:43:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 124 states have (on average 1.3387096774193548) internal successors, (166), 124 states have internal predecessors, (166), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 11:43:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 240 transitions. [2021-12-15 11:43:01,245 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 240 transitions. Word has length 46 [2021-12-15 11:43:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:43:01,245 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 240 transitions. [2021-12-15 11:43:01,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:43:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 240 transitions. [2021-12-15 11:43:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:43:01,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:43:01,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:43:01,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-15 11:43:01,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 11:43:01,460 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:43:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:43:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1136086573, now seen corresponding path program 1 times [2021-12-15 11:43:01,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:43:01,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742144626] [2021-12-15 11:43:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:43:01,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:43:01,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:43:01,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 11:43:01,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-15 11:43:01,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-15 11:43:01,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 11:43:01,815 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 11:43:01,818 INFO L158 Benchmark]: Toolchain (without parser) took 7862.59ms. Allocated memory was 67.1MB in the beginning and 109.1MB in the end (delta: 41.9MB). Free memory was 46.6MB in the beginning and 65.1MB in the end (delta: -18.5MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. [2021-12-15 11:43:01,818 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 67.1MB. Free memory was 49.6MB in the beginning and 49.5MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:43:01,818 INFO L158 Benchmark]: CACSL2BoogieTranslator took 448.42ms. Allocated memory is still 67.1MB. Free memory was 46.4MB in the beginning and 33.7MB in the end (delta: 12.7MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2021-12-15 11:43:01,818 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.23ms. Allocated memory was 67.1MB in the beginning and 86.0MB in the end (delta: 18.9MB). Free memory was 33.7MB in the beginning and 66.9MB in the end (delta: -33.2MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2021-12-15 11:43:01,819 INFO L158 Benchmark]: Boogie Preprocessor took 102.49ms. Allocated memory is still 86.0MB. Free memory was 66.9MB in the beginning and 62.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 11:43:01,819 INFO L158 Benchmark]: RCFGBuilder took 3024.08ms. Allocated memory is still 86.0MB. Free memory was 62.7MB in the beginning and 58.0MB in the end (delta: 4.7MB). Peak memory consumption was 29.0MB. Max. memory is 16.1GB. [2021-12-15 11:43:01,819 INFO L158 Benchmark]: TraceAbstraction took 4180.74ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 57.9MB in the beginning and 65.1MB in the end (delta: -7.2MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. [2021-12-15 11:43:01,820 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 67.1MB. Free memory was 49.6MB in the beginning and 49.5MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 448.42ms. Allocated memory is still 67.1MB. Free memory was 46.4MB in the beginning and 33.7MB in the end (delta: 12.7MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.23ms. Allocated memory was 67.1MB in the beginning and 86.0MB in the end (delta: 18.9MB). Free memory was 33.7MB in the beginning and 66.9MB in the end (delta: -33.2MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 102.49ms. Allocated memory is still 86.0MB. Free memory was 66.9MB in the beginning and 62.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 3024.08ms. Allocated memory is still 86.0MB. Free memory was 62.7MB in the beginning and 58.0MB in the end (delta: 4.7MB). Peak memory consumption was 29.0MB. Max. memory is 16.1GB. * TraceAbstraction took 4180.74ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 57.9MB in the beginning and 65.1MB in the end (delta: -7.2MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 11:43:01,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable