./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 06:01:13,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 06:01:13,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 06:01:13,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 06:01:13,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 06:01:13,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 06:01:13,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 06:01:13,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 06:01:13,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 06:01:13,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 06:01:13,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 06:01:13,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 06:01:13,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 06:01:13,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 06:01:13,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 06:01:13,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 06:01:13,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 06:01:13,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 06:01:13,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 06:01:13,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 06:01:13,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 06:01:13,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 06:01:13,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 06:01:13,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 06:01:13,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 06:01:13,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 06:01:13,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 06:01:13,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 06:01:13,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 06:01:13,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 06:01:13,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 06:01:13,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 06:01:13,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 06:01:13,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 06:01:13,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 06:01:13,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 06:01:13,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 06:01:13,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 06:01:13,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 06:01:13,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 06:01:13,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 06:01:13,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 06:01:13,420 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 06:01:13,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 06:01:13,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 06:01:13,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 06:01:13,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 06:01:13,422 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 06:01:13,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 06:01:13,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 06:01:13,423 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 06:01:13,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 06:01:13,424 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 06:01:13,424 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 06:01:13,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 06:01:13,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 06:01:13,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 06:01:13,425 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 06:01:13,425 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 06:01:13,425 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 06:01:13,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 06:01:13,425 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 06:01:13,426 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 06:01:13,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 06:01:13,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 06:01:13,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 06:01:13,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 06:01:13,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 06:01:13,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 06:01:13,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 06:01:13,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 06:01:13,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 06:01:13,427 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-12-28 06:01:13,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 06:01:13,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 06:01:13,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 06:01:13,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 06:01:13,806 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 06:01:13,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-12-28 06:01:13,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae48426c4/c6f31a61c765435a90e1835fbadece02/FLAG3e47ee48c [2021-12-28 06:01:14,225 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 06:01:14,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-12-28 06:01:14,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae48426c4/c6f31a61c765435a90e1835fbadece02/FLAG3e47ee48c [2021-12-28 06:01:14,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae48426c4/c6f31a61c765435a90e1835fbadece02 [2021-12-28 06:01:14,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 06:01:14,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 06:01:14,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 06:01:14,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 06:01:14,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 06:01:14,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 06:01:14" (1/1) ... [2021-12-28 06:01:14,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea0bfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:14, skipping insertion in model container [2021-12-28 06:01:14,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 06:01:14" (1/1) ... [2021-12-28 06:01:14,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 06:01:14,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 06:01:14,997 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/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-12-28 06:01:15,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 06:01:15,017 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 06:01:15,090 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/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-12-28 06:01:15,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 06:01:15,119 INFO L208 MainTranslator]: Completed translation [2021-12-28 06:01:15,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15 WrapperNode [2021-12-28 06:01:15,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 06:01:15,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 06:01:15,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 06:01:15,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 06:01:15,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,165 INFO L137 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2021-12-28 06:01:15,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 06:01:15,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 06:01:15,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 06:01:15,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 06:01:15,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 06:01:15,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 06:01:15,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 06:01:15,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 06:01:15,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (1/1) ... [2021-12-28 06:01:15,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 06:01:15,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:15,247 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) [2021-12-28 06:01:15,260 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 [2021-12-28 06:01:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 06:01:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 06:01:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-28 06:01:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-28 06:01:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 06:01:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 06:01:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 06:01:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 06:01:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 06:01:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 06:01:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 06:01:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 06:01:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 06:01:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 06:01:15,501 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 06:01:15,503 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 06:01:15,882 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 06:01:15,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 06:01:15,890 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 06:01:15,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 06:01:15 BoogieIcfgContainer [2021-12-28 06:01:15,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 06:01:15,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 06:01:15,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 06:01:15,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 06:01:15,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 06:01:14" (1/3) ... [2021-12-28 06:01:15,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3710864c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 06:01:15, skipping insertion in model container [2021-12-28 06:01:15,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:15" (2/3) ... [2021-12-28 06:01:15,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3710864c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 06:01:15, skipping insertion in model container [2021-12-28 06:01:15,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 06:01:15" (3/3) ... [2021-12-28 06:01:15,899 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-12-28 06:01:15,904 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 06:01:15,905 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2021-12-28 06:01:15,953 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 06:01:15,985 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-28 06:01:15,985 INFO L340 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2021-12-28 06:01:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 06:01:16,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:16,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 06:01:16,026 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash 895303154, now seen corresponding path program 1 times [2021-12-28 06:01:16,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:16,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722843076] [2021-12-28 06:01:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:16,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:16,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:16,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722843076] [2021-12-28 06:01:16,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722843076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:16,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:16,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 06:01:16,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874758339] [2021-12-28 06:01:16,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:16,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 06:01:16,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:16,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 06:01:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:16,299 INFO L87 Difference]: Start difference. First operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:16,465 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-12-28 06:01:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 06:01:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 06:01:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:16,489 INFO L225 Difference]: With dead ends: 127 [2021-12-28 06:01:16,489 INFO L226 Difference]: Without dead ends: 124 [2021-12-28 06:01:16,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:16,494 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:16,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-28 06:01:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-28 06:01:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 63 states have (on average 2.0) internal successors, (126), 119 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2021-12-28 06:01:16,544 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 6 [2021-12-28 06:01:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:16,545 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2021-12-28 06:01:16,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2021-12-28 06:01:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 06:01:16,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:16,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 06:01:16,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 06:01:16,546 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash 895303155, now seen corresponding path program 1 times [2021-12-28 06:01:16,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:16,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644409037] [2021-12-28 06:01:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:16,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:16,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:16,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644409037] [2021-12-28 06:01:16,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644409037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:16,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:16,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 06:01:16,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651120837] [2021-12-28 06:01:16,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:16,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 06:01:16,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 06:01:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:16,596 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:16,672 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2021-12-28 06:01:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 06:01:16,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 06:01:16,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:16,674 INFO L225 Difference]: With dead ends: 121 [2021-12-28 06:01:16,674 INFO L226 Difference]: Without dead ends: 121 [2021-12-28 06:01:16,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:16,676 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:16,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 195 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-28 06:01:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-28 06:01:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-12-28 06:01:16,686 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 6 [2021-12-28 06:01:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:16,686 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-12-28 06:01:16,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-12-28 06:01:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 06:01:16,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:16,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:16,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 06:01:16,688 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1495162356, now seen corresponding path program 1 times [2021-12-28 06:01:16,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:16,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953624833] [2021-12-28 06:01:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:16,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:16,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:16,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:16,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953624833] [2021-12-28 06:01:16,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953624833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:16,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:16,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 06:01:16,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797552788] [2021-12-28 06:01:16,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:16,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 06:01:16,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:16,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 06:01:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 06:01:16,781 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 06:01:16,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:16,888 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-12-28 06:01:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 06:01:16,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-28 06:01:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:16,890 INFO L225 Difference]: With dead ends: 132 [2021-12-28 06:01:16,890 INFO L226 Difference]: Without dead ends: 132 [2021-12-28 06:01:16,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 06:01:16,891 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 10 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:16,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 292 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-28 06:01:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2021-12-28 06:01:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.9375) internal successors, (124), 117 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2021-12-28 06:01:16,906 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 14 [2021-12-28 06:01:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:16,906 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2021-12-28 06:01:16,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 06:01:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2021-12-28 06:01:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 06:01:16,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:16,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:16,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 06:01:16,909 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:16,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192736, now seen corresponding path program 1 times [2021-12-28 06:01:16,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:16,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839109313] [2021-12-28 06:01:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:16,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:17,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:17,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 06:01:17,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:17,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839109313] [2021-12-28 06:01:17,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839109313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:17,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:17,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 06:01:17,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158581726] [2021-12-28 06:01:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:17,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 06:01:17,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 06:01:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:17,144 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:17,382 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-12-28 06:01:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:17,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-28 06:01:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:17,386 INFO L225 Difference]: With dead ends: 122 [2021-12-28 06:01:17,386 INFO L226 Difference]: Without dead ends: 122 [2021-12-28 06:01:17,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:17,387 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 21 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:17,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 394 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-28 06:01:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-12-28 06:01:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 64 states have (on average 1.921875) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-12-28 06:01:17,394 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 24 [2021-12-28 06:01:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:17,395 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-12-28 06:01:17,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-12-28 06:01:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 06:01:17,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:17,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:17,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 06:01:17,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192737, now seen corresponding path program 1 times [2021-12-28 06:01:17,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:17,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208255150] [2021-12-28 06:01:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:17,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:17,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:17,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:17,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208255150] [2021-12-28 06:01:17,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208255150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:17,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:17,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 06:01:17,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599412645] [2021-12-28 06:01:17,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:17,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 06:01:17,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 06:01:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:17,533 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:17,773 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-12-28 06:01:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-28 06:01:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:17,775 INFO L225 Difference]: With dead ends: 121 [2021-12-28 06:01:17,775 INFO L226 Difference]: Without dead ends: 121 [2021-12-28 06:01:17,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:17,776 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 19 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:17,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 418 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-28 06:01:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-12-28 06:01:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.90625) internal successors, (122), 115 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-12-28 06:01:17,782 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 24 [2021-12-28 06:01:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:17,782 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-12-28 06:01:17,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-12-28 06:01:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 06:01:17,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:17,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:17,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 06:01:17,784 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash -408475519, now seen corresponding path program 1 times [2021-12-28 06:01:17,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75037995] [2021-12-28 06:01:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:17,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:17,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:17,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75037995] [2021-12-28 06:01:17,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75037995] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226314886] [2021-12-28 06:01:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:17,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:17,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:17,926 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) [2021-12-28 06:01:17,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 06:01:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 06:01:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:18,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:18,292 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 06:01:18,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 06:01:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:18,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:18,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226314886] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:18,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:18,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-28 06:01:18,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558544036] [2021-12-28 06:01:18,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:18,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 06:01:18,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 06:01:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-28 06:01:18,369 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:18,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:18,629 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-12-28 06:01:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:18,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-28 06:01:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:18,631 INFO L225 Difference]: With dead ends: 145 [2021-12-28 06:01:18,631 INFO L226 Difference]: Without dead ends: 145 [2021-12-28 06:01:18,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-28 06:01:18,632 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 102 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:18,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 414 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2021-12-28 06:01:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-28 06:01:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2021-12-28 06:01:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 68 states have (on average 1.8823529411764706) internal successors, (128), 119 states have internal predecessors, (128), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-12-28 06:01:18,650 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 26 [2021-12-28 06:01:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:18,651 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-12-28 06:01:18,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-12-28 06:01:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 06:01:18,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:18,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:18,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:18,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-28 06:01:18,876 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash -408475518, now seen corresponding path program 1 times [2021-12-28 06:01:18,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:18,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18568037] [2021-12-28 06:01:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:18,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:18,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:19,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:19,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18568037] [2021-12-28 06:01:19,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18568037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385035932] [2021-12-28 06:01:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:19,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:19,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:19,084 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) [2021-12-28 06:01:19,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 06:01:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:19,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-28 06:01:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:19,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:19,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:19,486 INFO L353 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-28 06:01:19,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2021-12-28 06:01:19,513 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 06:01:19,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 06:01:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:19,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:19,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385035932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:19,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:19,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-28 06:01:19,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600188744] [2021-12-28 06:01:19,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:19,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-28 06:01:19,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-28 06:01:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-28 06:01:19,759 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 06:01:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:20,151 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2021-12-28 06:01:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 06:01:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-12-28 06:01:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:20,152 INFO L225 Difference]: With dead ends: 127 [2021-12-28 06:01:20,152 INFO L226 Difference]: Without dead ends: 127 [2021-12-28 06:01:20,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-12-28 06:01:20,153 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 16 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:20,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 600 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 06:01:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-28 06:01:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-12-28 06:01:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 68 states have (on average 1.8676470588235294) internal successors, (127), 119 states have internal predecessors, (127), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-12-28 06:01:20,156 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 26 [2021-12-28 06:01:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:20,156 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-12-28 06:01:20,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 06:01:20,157 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-12-28 06:01:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-28 06:01:20,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:20,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:20,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:20,367 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,SelfDestructingSolverStorable6 [2021-12-28 06:01:20,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:20,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1702795689, now seen corresponding path program 1 times [2021-12-28 06:01:20,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:20,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701029381] [2021-12-28 06:01:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:20,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:20,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:20,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:20,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701029381] [2021-12-28 06:01:20,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701029381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328339506] [2021-12-28 06:01:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:20,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:20,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:20,524 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 06:01:20,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 06:01:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 06:01:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:20,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:20,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328339506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:20,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 06:01:20,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-12-28 06:01:20,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100058085] [2021-12-28 06:01:20,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:20,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 06:01:20,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 06:01:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:20,795 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:20,931 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-12-28 06:01:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:20,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-28 06:01:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:20,934 INFO L225 Difference]: With dead ends: 126 [2021-12-28 06:01:20,934 INFO L226 Difference]: Without dead ends: 126 [2021-12-28 06:01:20,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:20,935 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 4 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:20,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 616 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-28 06:01:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-12-28 06:01:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 68 states have (on average 1.8529411764705883) internal successors, (126), 119 states have internal predecessors, (126), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2021-12-28 06:01:20,941 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 28 [2021-12-28 06:01:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:20,941 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2021-12-28 06:01:20,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2021-12-28 06:01:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 06:01:20,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:20,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:20,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-28 06:01:21,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:21,163 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839470, now seen corresponding path program 1 times [2021-12-28 06:01:21,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:21,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669448278] [2021-12-28 06:01:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:21,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:21,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:21,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:21,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669448278] [2021-12-28 06:01:21,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669448278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544380406] [2021-12-28 06:01:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:21,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:21,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:21,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 06:01:21,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 06:01:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:21,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 06:01:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:21,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:21,368 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-28 06:01:21,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 06:01:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:21,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544380406] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:21,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 06:01:21,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2021-12-28 06:01:21,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108898947] [2021-12-28 06:01:21,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:21,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:01:21,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:01:21,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:21,402 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:21,534 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2021-12-28 06:01:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:21,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-12-28 06:01:21,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:21,535 INFO L225 Difference]: With dead ends: 130 [2021-12-28 06:01:21,536 INFO L226 Difference]: Without dead ends: 130 [2021-12-28 06:01:21,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:21,536 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 13 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:21,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 289 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-28 06:01:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2021-12-28 06:01:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 122 states have internal predecessors, (131), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2021-12-28 06:01:21,539 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 29 [2021-12-28 06:01:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:21,539 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2021-12-28 06:01:21,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2021-12-28 06:01:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 06:01:21,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:21,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:21,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:21,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:21,749 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839469, now seen corresponding path program 1 times [2021-12-28 06:01:21,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:21,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144910334] [2021-12-28 06:01:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:21,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:21,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:21,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:21,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:21,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144910334] [2021-12-28 06:01:21,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144910334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:21,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035047050] [2021-12-28 06:01:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:21,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:21,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:21,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 06:01:21,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 06:01:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 06:01:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:22,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:22,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:22,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-12-28 06:01:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:22,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035047050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:22,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 06:01:22,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2021-12-28 06:01:22,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120683233] [2021-12-28 06:01:22,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:22,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 06:01:22,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 06:01:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-28 06:01:22,275 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-28 06:01:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:22,460 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-12-28 06:01:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 06:01:22,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2021-12-28 06:01:22,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:22,461 INFO L225 Difference]: With dead ends: 135 [2021-12-28 06:01:22,461 INFO L226 Difference]: Without dead ends: 135 [2021-12-28 06:01:22,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-28 06:01:22,462 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 33 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:22,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1212 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-28 06:01:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 128. [2021-12-28 06:01:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 71 states have (on average 1.8309859154929577) internal successors, (130), 122 states have internal predecessors, (130), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2021-12-28 06:01:22,464 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 29 [2021-12-28 06:01:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:22,464 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2021-12-28 06:01:22,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-28 06:01:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2021-12-28 06:01:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 06:01:22,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:22,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:22,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:22,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 06:01:22,665 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash -152317901, now seen corresponding path program 1 times [2021-12-28 06:01:22,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:22,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150120030] [2021-12-28 06:01:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:22,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:22,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:22,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 06:01:22,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:22,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150120030] [2021-12-28 06:01:22,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150120030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:22,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:22,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 06:01:22,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726961818] [2021-12-28 06:01:22,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:22,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 06:01:22,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 06:01:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:22,774 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:22,991 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-12-28 06:01:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 06:01:22,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-28 06:01:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:22,992 INFO L225 Difference]: With dead ends: 128 [2021-12-28 06:01:22,992 INFO L226 Difference]: Without dead ends: 128 [2021-12-28 06:01:22,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 06:01:22,993 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 23 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:22,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 438 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:22,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-28 06:01:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-12-28 06:01:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 71 states have (on average 1.8169014084507042) internal successors, (129), 121 states have internal predecessors, (129), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2021-12-28 06:01:22,996 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 30 [2021-12-28 06:01:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:22,996 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2021-12-28 06:01:22,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2021-12-28 06:01:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 06:01:22,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:22,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:22,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 06:01:22,996 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:22,997 INFO L85 PathProgramCache]: Analyzing trace with hash -152317900, now seen corresponding path program 1 times [2021-12-28 06:01:22,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:22,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986027774] [2021-12-28 06:01:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:22,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:23,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:23,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986027774] [2021-12-28 06:01:23,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986027774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:23,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:23,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 06:01:23,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589763956] [2021-12-28 06:01:23,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:23,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 06:01:23,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 06:01:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:23,103 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:23,320 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-12-28 06:01:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 06:01:23,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-28 06:01:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:23,321 INFO L225 Difference]: With dead ends: 126 [2021-12-28 06:01:23,321 INFO L226 Difference]: Without dead ends: 126 [2021-12-28 06:01:23,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 06:01:23,321 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 20 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:23,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 468 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-28 06:01:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-12-28 06:01:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 71 states have (on average 1.8028169014084507) internal successors, (128), 120 states have internal predecessors, (128), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-12-28 06:01:23,324 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 30 [2021-12-28 06:01:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:23,324 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-12-28 06:01:23,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-12-28 06:01:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 06:01:23,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:23,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:23,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 06:01:23,325 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1115824007, now seen corresponding path program 1 times [2021-12-28 06:01:23,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:23,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566489614] [2021-12-28 06:01:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:23,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-28 06:01:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 06:01:23,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:23,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566489614] [2021-12-28 06:01:23,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566489614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:23,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147094351] [2021-12-28 06:01:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:23,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:23,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:23,393 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 06:01:23,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 06:01:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 06:01:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:23,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:01:23,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147094351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:23,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 06:01:23,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-28 06:01:23,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933247348] [2021-12-28 06:01:23,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:23,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 06:01:23,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 06:01:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:23,584 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:23,593 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2021-12-28 06:01:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 06:01:23,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-28 06:01:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:23,594 INFO L225 Difference]: With dead ends: 114 [2021-12-28 06:01:23,594 INFO L226 Difference]: Without dead ends: 114 [2021-12-28 06:01:23,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:23,595 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 196 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:23,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 133 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 06:01:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-28 06:01:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-12-28 06:01:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 64 states have (on average 1.78125) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2021-12-28 06:01:23,597 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 41 [2021-12-28 06:01:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:23,597 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2021-12-28 06:01:23,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2021-12-28 06:01:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 06:01:23,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:23,598 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 06:01:23,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:23,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:23,816 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1638195673, now seen corresponding path program 1 times [2021-12-28 06:01:23,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:23,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904453397] [2021-12-28 06:01:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:23,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 06:01:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 06:01:23,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904453397] [2021-12-28 06:01:23,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904453397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762275797] [2021-12-28 06:01:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:23,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:23,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:23,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 06:01:23,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 06:01:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-28 06:01:24,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:24,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:24,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 06:01:24,260 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2021-12-28 06:01:24,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-28 06:01:24,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:24,472 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 102479 column 46: unknown constant v_#valid_BEFORE_CALL_6 at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.checkOrAddAxiom(DiffWrapperScript.java:161) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.convertApplicationTerm(DiffWrapperScript.java:171) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:109) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertTerm(ManagedScript.java:134) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:829) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) 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.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) 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) [2021-12-28 06:01:24,475 INFO L158 Benchmark]: Toolchain (without parser) took 9861.10ms. Allocated memory was 58.7MB in the beginning and 148.9MB in the end (delta: 90.2MB). Free memory was 36.5MB in the beginning and 106.7MB in the end (delta: -70.2MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. [2021-12-28 06:01:24,475 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 41.3MB in the beginning and 41.2MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 06:01:24,475 INFO L158 Benchmark]: CACSL2BoogieTranslator took 497.93ms. Allocated memory is still 58.7MB. Free memory was 36.3MB in the beginning and 35.1MB in the end (delta: 1.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-28 06:01:24,475 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.70ms. Allocated memory is still 58.7MB. Free memory was 35.0MB in the beginning and 32.7MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-28 06:01:24,475 INFO L158 Benchmark]: Boogie Preprocessor took 36.52ms. Allocated memory is still 58.7MB. Free memory was 32.7MB in the beginning and 30.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 06:01:24,476 INFO L158 Benchmark]: RCFGBuilder took 688.47ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 30.8MB in the beginning and 36.7MB in the end (delta: -6.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-28 06:01:24,476 INFO L158 Benchmark]: TraceAbstraction took 8581.02ms. Allocated memory was 71.3MB in the beginning and 148.9MB in the end (delta: 77.6MB). Free memory was 36.1MB in the beginning and 106.7MB in the end (delta: -70.6MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-12-28 06:01:24,477 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 41.3MB in the beginning and 41.2MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 497.93ms. Allocated memory is still 58.7MB. Free memory was 36.3MB in the beginning and 35.1MB in the end (delta: 1.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.70ms. Allocated memory is still 58.7MB. Free memory was 35.0MB in the beginning and 32.7MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.52ms. Allocated memory is still 58.7MB. Free memory was 32.7MB in the beginning and 30.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 688.47ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 30.8MB in the beginning and 36.7MB in the end (delta: -6.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8581.02ms. Allocated memory was 71.3MB in the beginning and 148.9MB in the end (delta: 77.6MB). Free memory was 36.1MB in the beginning and 106.7MB in the end (delta: -70.6MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 102479 column 46: unknown constant v_#valid_BEFORE_CALL_6 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 102479 column 46: unknown constant v_#valid_BEFORE_CALL_6: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-28 06:01:24,496 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 1 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 06:01:26,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 06:01:26,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 06:01:26,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 06:01:26,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 06:01:26,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 06:01:26,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 06:01:26,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 06:01:26,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 06:01:26,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 06:01:26,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 06:01:26,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 06:01:26,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 06:01:26,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 06:01:26,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 06:01:26,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 06:01:26,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 06:01:26,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 06:01:26,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 06:01:26,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 06:01:26,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 06:01:26,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 06:01:26,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 06:01:26,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 06:01:26,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 06:01:26,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 06:01:26,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 06:01:26,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 06:01:26,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 06:01:26,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 06:01:26,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 06:01:26,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 06:01:26,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 06:01:26,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 06:01:26,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 06:01:26,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 06:01:26,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 06:01:26,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 06:01:26,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 06:01:26,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 06:01:26,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 06:01:26,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-28 06:01:26,749 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 06:01:26,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 06:01:26,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 06:01:26,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 06:01:26,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 06:01:26,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 06:01:26,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 06:01:26,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 06:01:26,755 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 06:01:26,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 06:01:26,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 06:01:26,756 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 06:01:26,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 06:01:26,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 06:01:26,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 06:01:26,757 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 06:01:26,757 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 06:01:26,757 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 06:01:26,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 06:01:26,757 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 06:01:26,758 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-28 06:01:26,758 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-28 06:01:26,758 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 06:01:26,758 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 06:01:26,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 06:01:26,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 06:01:26,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 06:01:26,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 06:01:26,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 06:01:26,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 06:01:26,760 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-28 06:01:26,760 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-28 06:01:26,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-28 06:01:26,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-12-28 06:01:27,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 06:01:27,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 06:01:27,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 06:01:27,299 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 06:01:27,300 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 06:01:27,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-12-28 06:01:27,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5136a1a64/033a59c5a3ef49dc9573579355e41add/FLAG0135ba8fa [2021-12-28 06:01:27,963 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 06:01:27,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-12-28 06:01:27,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5136a1a64/033a59c5a3ef49dc9573579355e41add/FLAG0135ba8fa [2021-12-28 06:01:28,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5136a1a64/033a59c5a3ef49dc9573579355e41add [2021-12-28 06:01:28,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 06:01:28,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 06:01:28,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 06:01:28,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 06:01:28,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 06:01:28,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1349fde1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28, skipping insertion in model container [2021-12-28 06:01:28,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 06:01:28,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 06:01:28,682 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/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-12-28 06:01:28,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 06:01:28,705 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 06:01:28,766 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/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-12-28 06:01:28,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 06:01:28,806 INFO L208 MainTranslator]: Completed translation [2021-12-28 06:01:28,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28 WrapperNode [2021-12-28 06:01:28,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 06:01:28,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 06:01:28,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 06:01:28,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 06:01:28,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,887 INFO L137 Inliner]: procedures = 130, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 141 [2021-12-28 06:01:28,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 06:01:28,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 06:01:28,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 06:01:28,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 06:01:28,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 06:01:28,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 06:01:28,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 06:01:28,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 06:01:28,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (1/1) ... [2021-12-28 06:01:28,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 06:01:28,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:28,992 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) [2021-12-28 06:01:28,994 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 [2021-12-28 06:01:29,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-28 06:01:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-28 06:01:29,024 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-28 06:01:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 06:01:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 06:01:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 06:01:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 06:01:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 06:01:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 06:01:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-28 06:01:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 06:01:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-28 06:01:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 06:01:29,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 06:01:29,191 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 06:01:29,193 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 06:01:29,651 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 06:01:29,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 06:01:29,659 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 06:01:29,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 06:01:29 BoogieIcfgContainer [2021-12-28 06:01:29,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 06:01:29,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 06:01:29,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 06:01:29,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 06:01:29,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 06:01:28" (1/3) ... [2021-12-28 06:01:29,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cf396f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 06:01:29, skipping insertion in model container [2021-12-28 06:01:29,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:28" (2/3) ... [2021-12-28 06:01:29,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cf396f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 06:01:29, skipping insertion in model container [2021-12-28 06:01:29,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 06:01:29" (3/3) ... [2021-12-28 06:01:29,667 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-12-28 06:01:29,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 06:01:29,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2021-12-28 06:01:29,706 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 06:01:29,710 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-28 06:01:29,710 INFO L340 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2021-12-28 06:01:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 06:01:29,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:29,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 06:01:29,726 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:29,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash 895303154, now seen corresponding path program 1 times [2021-12-28 06:01:29,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:29,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418294167] [2021-12-28 06:01:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:29,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:29,748 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) [2021-12-28 06:01:29,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-28 06:01:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:29,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 06:01:29,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:29,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:29,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:01:29,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418294167] [2021-12-28 06:01:29,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418294167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:29,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:29,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 06:01:29,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361210643] [2021-12-28 06:01:29,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:29,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 06:01:29,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:29,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 06:01:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:29,949 INFO L87 Difference]: Start difference. First operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:30,124 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-12-28 06:01:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 06:01:30,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 06:01:30,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:30,132 INFO L225 Difference]: With dead ends: 127 [2021-12-28 06:01:30,132 INFO L226 Difference]: Without dead ends: 124 [2021-12-28 06:01:30,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:30,148 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:30,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-28 06:01:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-28 06:01:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 63 states have (on average 2.0) internal successors, (126), 119 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2021-12-28 06:01:30,180 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 6 [2021-12-28 06:01:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:30,181 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2021-12-28 06:01:30,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2021-12-28 06:01:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 06:01:30,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:30,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 06:01:30,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-28 06:01:30,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:30,388 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:30,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash 895303155, now seen corresponding path program 1 times [2021-12-28 06:01:30,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:30,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655483547] [2021-12-28 06:01:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:30,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:30,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:30,393 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) [2021-12-28 06:01:30,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-28 06:01:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 06:01:30,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:30,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:30,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:01:30,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:30,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655483547] [2021-12-28 06:01:30,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655483547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:30,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:30,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 06:01:30,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725369258] [2021-12-28 06:01:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:30,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 06:01:30,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 06:01:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:30,542 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:30,783 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2021-12-28 06:01:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 06:01:30,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 06:01:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:30,785 INFO L225 Difference]: With dead ends: 121 [2021-12-28 06:01:30,785 INFO L226 Difference]: Without dead ends: 121 [2021-12-28 06:01:30,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:30,787 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:30,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 195 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-28 06:01:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-28 06:01:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-12-28 06:01:30,799 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 6 [2021-12-28 06:01:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:30,799 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-12-28 06:01:30,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-12-28 06:01:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 06:01:30,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:30,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:30,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-28 06:01:31,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:31,009 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:31,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1495162356, now seen corresponding path program 1 times [2021-12-28 06:01:31,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:31,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923800184] [2021-12-28 06:01:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:31,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:31,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:31,012 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) [2021-12-28 06:01:31,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-28 06:01:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 06:01:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:31,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:01:31,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923800184] [2021-12-28 06:01:31,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923800184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:31,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:31,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 06:01:31,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027648060] [2021-12-28 06:01:31,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:31,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 06:01:31,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:31,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 06:01:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:31,141 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 06:01:31,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:31,155 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-12-28 06:01:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 06:01:31,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-28 06:01:31,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:31,161 INFO L225 Difference]: With dead ends: 132 [2021-12-28 06:01:31,161 INFO L226 Difference]: Without dead ends: 132 [2021-12-28 06:01:31,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:31,164 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 10 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:31,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 251 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 06:01:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-28 06:01:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2021-12-28 06:01:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.9375) internal successors, (124), 117 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2021-12-28 06:01:31,181 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 14 [2021-12-28 06:01:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:31,181 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2021-12-28 06:01:31,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 06:01:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2021-12-28 06:01:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 06:01:31,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:31,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:31,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:31,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:31,390 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192736, now seen corresponding path program 1 times [2021-12-28 06:01:31,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:31,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042207221] [2021-12-28 06:01:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:31,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:31,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:31,393 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) [2021-12-28 06:01:31,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-28 06:01:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 06:01:31,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:31,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:31,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:01:31,566 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:31,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042207221] [2021-12-28 06:01:31,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042207221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:31,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:31,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 06:01:31,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256679037] [2021-12-28 06:01:31,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:31,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:01:31,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:01:31,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:31,571 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:31,924 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-12-28 06:01:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 06:01:31,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-28 06:01:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:31,926 INFO L225 Difference]: With dead ends: 122 [2021-12-28 06:01:31,926 INFO L226 Difference]: Without dead ends: 122 [2021-12-28 06:01:31,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:31,927 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 20 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:31,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 357 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 06:01:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-28 06:01:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-12-28 06:01:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 64 states have (on average 1.921875) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-12-28 06:01:31,932 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 24 [2021-12-28 06:01:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:31,933 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-12-28 06:01:31,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-12-28 06:01:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 06:01:31,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:31,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:31,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:32,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:32,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192737, now seen corresponding path program 1 times [2021-12-28 06:01:32,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:32,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410383781] [2021-12-28 06:01:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:32,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:32,144 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) [2021-12-28 06:01:32,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-28 06:01:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:32,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 06:01:32,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:32,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:32,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:01:32,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:32,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410383781] [2021-12-28 06:01:32,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410383781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:32,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:32,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 06:01:32,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315780438] [2021-12-28 06:01:32,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:32,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:01:32,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:32,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:01:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:32,402 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:32,789 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-12-28 06:01:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 06:01:32,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-28 06:01:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:32,791 INFO L225 Difference]: With dead ends: 121 [2021-12-28 06:01:32,791 INFO L226 Difference]: Without dead ends: 121 [2021-12-28 06:01:32,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:32,792 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 19 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:32,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 381 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 06:01:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-28 06:01:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-12-28 06:01:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.90625) internal successors, (122), 115 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-12-28 06:01:32,799 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 24 [2021-12-28 06:01:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:32,799 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-12-28 06:01:32,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-12-28 06:01:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 06:01:32,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:32,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:32,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:33,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:33,011 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash -408475519, now seen corresponding path program 1 times [2021-12-28 06:01:33,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:33,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954181174] [2021-12-28 06:01:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:33,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:33,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:33,014 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) [2021-12-28 06:01:33,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-28 06:01:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:33,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 06:01:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:33,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:33,389 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-28 06:01:33,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-28 06:01:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:33,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:33,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:33,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954181174] [2021-12-28 06:01:33,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954181174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:33,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:33,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-28 06:01:33,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664591410] [2021-12-28 06:01:33,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:33,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 06:01:33,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 06:01:33,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 06:01:33,660 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:34,073 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-12-28 06:01:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 06:01:34,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-28 06:01:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:34,074 INFO L225 Difference]: With dead ends: 135 [2021-12-28 06:01:34,074 INFO L226 Difference]: Without dead ends: 135 [2021-12-28 06:01:34,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-28 06:01:34,075 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 7 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:34,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 403 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 81 Unchecked, 0.4s Time] [2021-12-28 06:01:34,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-28 06:01:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-12-28 06:01:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 75 states have (on average 1.8) internal successors, (135), 126 states have internal predecessors, (135), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-12-28 06:01:34,080 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 26 [2021-12-28 06:01:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:34,080 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-12-28 06:01:34,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-12-28 06:01:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 06:01:34,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:34,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:34,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:34,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:34,282 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash -408475518, now seen corresponding path program 1 times [2021-12-28 06:01:34,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:34,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318701809] [2021-12-28 06:01:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:34,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:34,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:01:34,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-28 06:01:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:34,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 06:01:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:34,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:34,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:34,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:34,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 06:01:34,729 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 06:01:34,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 06:01:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:34,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:37,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318701809] [2021-12-28 06:01:37,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318701809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [878769161] [2021-12-28 06:01:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:37,246 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-28 06:01:37,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-28 06:01:37,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-28 06:01:37,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-28 06:01:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:37,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 06:01:37,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:37,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:37,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:37,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:37,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 06:01:37,807 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 06:01:37,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 06:01:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:37,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [878769161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:38,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:38,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-28 06:01:38,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786477111] [2021-12-28 06:01:38,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:38,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 06:01:38,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 06:01:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2021-12-28 06:01:38,148 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:38,888 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-12-28 06:01:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 06:01:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-28 06:01:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:38,889 INFO L225 Difference]: With dead ends: 135 [2021-12-28 06:01:38,889 INFO L226 Difference]: Without dead ends: 135 [2021-12-28 06:01:38,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2021-12-28 06:01:38,890 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 3 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:38,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 405 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 383 Invalid, 0 Unknown, 78 Unchecked, 0.7s Time] [2021-12-28 06:01:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-28 06:01:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-12-28 06:01:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 75 states have (on average 1.7866666666666666) internal successors, (134), 126 states have internal predecessors, (134), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2021-12-28 06:01:38,896 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 26 [2021-12-28 06:01:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:38,897 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2021-12-28 06:01:38,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:38,897 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2021-12-28 06:01:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-28 06:01:38,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:38,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:38,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-12-28 06:01:39,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-28 06:01:39,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:39,311 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:39,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1702795689, now seen corresponding path program 1 times [2021-12-28 06:01:39,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:39,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334245881] [2021-12-28 06:01:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:39,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:39,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:39,313 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:01:39,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-28 06:01:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 06:01:39,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:39,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:39,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:39,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334245881] [2021-12-28 06:01:39,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334245881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:39,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:39,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-28 06:01:39,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875268945] [2021-12-28 06:01:39,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:39,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:01:39,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:39,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:01:39,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:39,550 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:39,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:39,669 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2021-12-28 06:01:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 06:01:39,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-28 06:01:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:39,671 INFO L225 Difference]: With dead ends: 134 [2021-12-28 06:01:39,671 INFO L226 Difference]: Without dead ends: 134 [2021-12-28 06:01:39,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:39,672 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 4 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:39,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 579 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-28 06:01:39,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-28 06:01:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 75 states have (on average 1.7733333333333334) internal successors, (133), 126 states have internal predecessors, (133), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2021-12-28 06:01:39,681 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 28 [2021-12-28 06:01:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:39,682 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2021-12-28 06:01:39,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2021-12-28 06:01:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 06:01:39,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:39,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:39,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-28 06:01:39,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:39,887 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:39,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839470, now seen corresponding path program 1 times [2021-12-28 06:01:39,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:39,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739368620] [2021-12-28 06:01:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:39,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:39,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:39,889 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:01:39,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-28 06:01:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 06:01:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:40,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:40,111 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-28 06:01:40,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 06:01:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:40,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:40,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739368620] [2021-12-28 06:01:40,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739368620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:40,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:40,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-28 06:01:40,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370072360] [2021-12-28 06:01:40,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:40,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 06:01:40,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 06:01:40,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 06:01:40,147 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:40,328 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2021-12-28 06:01:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 06:01:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-28 06:01:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:40,329 INFO L225 Difference]: With dead ends: 138 [2021-12-28 06:01:40,329 INFO L226 Difference]: Without dead ends: 138 [2021-12-28 06:01:40,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 06:01:40,330 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 9 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:40,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 297 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-28 06:01:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-12-28 06:01:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 78 states have (on average 1.7692307692307692) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2021-12-28 06:01:40,334 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 29 [2021-12-28 06:01:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:40,334 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2021-12-28 06:01:40,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2021-12-28 06:01:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 06:01:40,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:40,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:40,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-28 06:01:40,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:40,536 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:40,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:40,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839469, now seen corresponding path program 1 times [2021-12-28 06:01:40,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:40,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692671405] [2021-12-28 06:01:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:40,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:40,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:40,538 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:01:40,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-28 06:01:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 06:01:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:40,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:40,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:40,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-12-28 06:01:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:41,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:41,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692671405] [2021-12-28 06:01:41,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692671405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:41,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:41,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-28 06:01:41,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441791444] [2021-12-28 06:01:41,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:41,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 06:01:41,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 06:01:41,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-28 06:01:41,219 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 06:01:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:41,912 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2021-12-28 06:01:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 06:01:41,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-12-28 06:01:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:41,914 INFO L225 Difference]: With dead ends: 143 [2021-12-28 06:01:41,914 INFO L226 Difference]: Without dead ends: 143 [2021-12-28 06:01:41,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-28 06:01:41,914 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 17 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:41,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1059 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 06:01:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-28 06:01:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2021-12-28 06:01:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 78 states have (on average 1.7564102564102564) internal successors, (137), 129 states have internal predecessors, (137), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2021-12-28 06:01:41,917 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 29 [2021-12-28 06:01:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:41,918 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2021-12-28 06:01:41,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 06:01:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2021-12-28 06:01:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 06:01:41,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:41,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:41,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:42,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:42,127 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:42,127 INFO L85 PathProgramCache]: Analyzing trace with hash -152317901, now seen corresponding path program 1 times [2021-12-28 06:01:42,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:42,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213724766] [2021-12-28 06:01:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:42,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:42,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:42,130 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:01:42,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-28 06:01:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:42,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 06:01:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:42,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:42,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:01:42,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:42,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213724766] [2021-12-28 06:01:42,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213724766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:42,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:42,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 06:01:42,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798270866] [2021-12-28 06:01:42,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:42,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 06:01:42,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:42,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 06:01:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:42,449 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:43,077 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2021-12-28 06:01:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:43,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-28 06:01:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:43,078 INFO L225 Difference]: With dead ends: 136 [2021-12-28 06:01:43,078 INFO L226 Difference]: Without dead ends: 136 [2021-12-28 06:01:43,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 06:01:43,079 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 22 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:43,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 402 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 06:01:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-28 06:01:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-12-28 06:01:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 78 states have (on average 1.7435897435897436) internal successors, (136), 128 states have internal predecessors, (136), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2021-12-28 06:01:43,096 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 30 [2021-12-28 06:01:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:43,097 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2021-12-28 06:01:43,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2021-12-28 06:01:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 06:01:43,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:43,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:43,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:43,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:43,311 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash -152317900, now seen corresponding path program 1 times [2021-12-28 06:01:43,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:43,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330663994] [2021-12-28 06:01:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:43,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:43,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:43,314 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:01:43,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-28 06:01:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 06:01:43,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:43,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:43,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:01:43,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:43,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330663994] [2021-12-28 06:01:43,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330663994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:43,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:43,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 06:01:43,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045580306] [2021-12-28 06:01:43,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:43,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 06:01:43,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:43,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 06:01:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:43,662 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:44,124 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-12-28 06:01:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:44,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-28 06:01:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:44,125 INFO L225 Difference]: With dead ends: 134 [2021-12-28 06:01:44,125 INFO L226 Difference]: Without dead ends: 134 [2021-12-28 06:01:44,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 06:01:44,126 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 20 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:44,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 432 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 06:01:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-28 06:01:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-12-28 06:01:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 78 states have (on average 1.7307692307692308) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 06:01:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2021-12-28 06:01:44,129 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 30 [2021-12-28 06:01:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:44,129 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2021-12-28 06:01:44,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2021-12-28 06:01:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 06:01:44,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:44,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:44,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:44,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:44,338 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:44,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1115824007, now seen corresponding path program 1 times [2021-12-28 06:01:44,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:44,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201221952] [2021-12-28 06:01:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:44,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:44,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:44,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:01:44,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-28 06:01:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 06:01:44,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:44,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 06:01:44,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:44,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201221952] [2021-12-28 06:01:44,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201221952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:44,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:44,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-28 06:01:44,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785465264] [2021-12-28 06:01:44,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:44,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:01:44,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:01:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:44,668 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 06:01:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:44,686 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-12-28 06:01:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 06:01:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-12-28 06:01:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:44,687 INFO L225 Difference]: With dead ends: 122 [2021-12-28 06:01:44,687 INFO L226 Difference]: Without dead ends: 122 [2021-12-28 06:01:44,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:44,687 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 98 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:44,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 268 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 06:01:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-28 06:01:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-12-28 06:01:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 71 states have (on average 1.704225352112676) internal successors, (121), 116 states have internal predecessors, (121), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2021-12-28 06:01:44,690 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 41 [2021-12-28 06:01:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:44,690 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2021-12-28 06:01:44,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 06:01:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2021-12-28 06:01:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 06:01:44,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:44,691 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 06:01:44,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:44,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:44,898 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:44,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1638195673, now seen corresponding path program 1 times [2021-12-28 06:01:44,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:44,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811900976] [2021-12-28 06:01:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:44,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:44,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:44,900 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:01:44,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-28 06:01:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:45,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 06:01:45,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:45,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:45,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 06:01:45,322 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-28 06:01:45,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-28 06:01:45,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 06:01:45,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:45,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 06:01:45,773 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-28 06:01:45,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2021-12-28 06:01:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:45,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:46,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:01:46,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811900976] [2021-12-28 06:01:46,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811900976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:46,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [39784358] [2021-12-28 06:01:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:46,152 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-28 06:01:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-28 06:01:46,153 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-28 06:01:46,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-28 06:01:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:46,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-28 06:01:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:46,558 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-28 06:01:46,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2021-12-28 06:01:46,595 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-28 06:01:46,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 06:01:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:46,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:46,712 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-28 06:01:46,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 31 [2021-12-28 06:01:46,838 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-28 06:01:46,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2021-12-28 06:01:47,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:47,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:47,054 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-28 06:01:47,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2021-12-28 06:01:47,578 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-28 06:01:47,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2021-12-28 06:01:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:47,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:47,689 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-28 06:01:47,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2021-12-28 06:01:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 06:01:47,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:47,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [39784358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:47,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:47,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-12-28 06:01:47,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31215943] [2021-12-28 06:01:47,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:47,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 06:01:47,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:01:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 06:01:47,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-12-28 06:01:47,901 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-28 06:01:56,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:56,976 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2021-12-28 06:01:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 06:01:56,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-12-28 06:01:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:56,978 INFO L225 Difference]: With dead ends: 129 [2021-12-28 06:01:56,978 INFO L226 Difference]: Without dead ends: 129 [2021-12-28 06:01:56,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-12-28 06:01:56,979 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 12 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:56,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 821 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 270 Invalid, 0 Unknown, 514 Unchecked, 0.3s Time] [2021-12-28 06:01:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-28 06:01:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-12-28 06:01:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 78 states have (on average 1.6282051282051282) internal successors, (127), 122 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2021-12-28 06:01:56,982 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 43 [2021-12-28 06:01:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:56,983 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2021-12-28 06:01:56,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-28 06:01:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2021-12-28 06:01:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 06:01:56,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:56,984 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 06:01:56,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:57,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:57,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:01:57,405 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:01:57,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1638195672, now seen corresponding path program 1 times [2021-12-28 06:01:57,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:01:57,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313516866] [2021-12-28 06:01:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:57,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:01:57,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:01:57,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:01:57,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-28 06:01:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-28 06:01:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:57,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:57,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:01:57,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 06:01:57,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 06:01:59,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:59,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 06:01:59,886 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 06:01:59,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 06:01:59,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 06:02:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:02,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 06:02:02,404 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 06:02:02,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-28 06:02:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:02:02,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:02:02,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:02:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313516866] [2021-12-28 06:02:02,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313516866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:02:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2059591126] [2021-12-28 06:02:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:02:02,739 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-28 06:02:02,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-28 06:02:02,743 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-28 06:02:02,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-12-28 06:02:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:02:03,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-28 06:02:03,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:02:03,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:03,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 06:02:03,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:03,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 06:02:03,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 06:02:05,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:05,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 06:02:05,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 06:02:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:06,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-28 06:02:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 06:02:06,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:02:08,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2059591126] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:02:08,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:02:08,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-28 06:02:08,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144123753] [2021-12-28 06:02:08,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:02:08,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 06:02:08,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:02:08,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 06:02:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=433, Unknown=4, NotChecked=0, Total=506 [2021-12-28 06:02:08,299 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-28 06:02:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:02:11,472 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2021-12-28 06:02:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 06:02:11,473 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-12-28 06:02:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:02:11,487 INFO L225 Difference]: With dead ends: 128 [2021-12-28 06:02:11,487 INFO L226 Difference]: Without dead ends: 128 [2021-12-28 06:02:11,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=112, Invalid=695, Unknown=5, NotChecked=0, Total=812 [2021-12-28 06:02:11,490 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 06:02:11,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 712 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 292 Invalid, 0 Unknown, 321 Unchecked, 0.7s Time] [2021-12-28 06:02:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-28 06:02:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-28 06:02:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 78 states have (on average 1.6153846153846154) internal successors, (126), 121 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:02:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-12-28 06:02:11,508 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 43 [2021-12-28 06:02:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:02:11,508 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-12-28 06:02:11,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-28 06:02:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-12-28 06:02:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 06:02:11,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:02:11,512 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 06:02:11,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-12-28 06:02:11,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-28 06:02:11,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:02:11,930 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:02:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:02:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1946956456, now seen corresponding path program 1 times [2021-12-28 06:02:11,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:02:11,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992392413] [2021-12-28 06:02:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:02:11,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:02:11,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:02:11,936 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:02:11,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-28 06:02:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:02:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 06:02:12,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:02:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-28 06:02:12,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:02:12,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:02:12,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992392413] [2021-12-28 06:02:12,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992392413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:02:12,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:02:12,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 06:02:12,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000171721] [2021-12-28 06:02:12,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:02:12,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 06:02:12,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:02:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 06:02:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:02:12,219 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 06:02:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:02:12,396 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-12-28 06:02:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 06:02:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-28 06:02:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:02:12,399 INFO L225 Difference]: With dead ends: 142 [2021-12-28 06:02:12,399 INFO L226 Difference]: Without dead ends: 142 [2021-12-28 06:02:12,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:02:12,400 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 80 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:02:12,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 102 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:02:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-28 06:02:12,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2021-12-28 06:02:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 78 states have (on average 1.564102564102564) internal successors, (122), 117 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:02:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-12-28 06:02:12,411 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 45 [2021-12-28 06:02:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:02:12,411 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-12-28 06:02:12,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 06:02:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-12-28 06:02:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 06:02:12,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:02:12,414 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 06:02:12,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-28 06:02:12,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:02:12,626 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:02:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:02:12,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1946956457, now seen corresponding path program 1 times [2021-12-28 06:02:12,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:02:12,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368527058] [2021-12-28 06:02:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:02:12,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:02:12,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:02:12,629 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:02:12,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-28 06:02:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:02:12,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 06:02:12,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:02:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-28 06:02:12,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:02:12,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:02:12,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368527058] [2021-12-28 06:02:12,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368527058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:02:12,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:02:12,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 06:02:12,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052202655] [2021-12-28 06:02:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:02:12,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 06:02:12,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:02:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 06:02:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 06:02:12,913 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:02:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:02:13,046 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2021-12-28 06:02:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 06:02:13,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2021-12-28 06:02:13,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:02:13,047 INFO L225 Difference]: With dead ends: 120 [2021-12-28 06:02:13,047 INFO L226 Difference]: Without dead ends: 120 [2021-12-28 06:02:13,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:02:13,048 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 244 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:02:13,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 114 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:02:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-28 06:02:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-28 06:02:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.5128205128205128) internal successors, (118), 113 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:02:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-12-28 06:02:13,051 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 45 [2021-12-28 06:02:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:02:13,052 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-12-28 06:02:13,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:02:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-12-28 06:02:13,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 06:02:13,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:02:13,053 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 06:02:13,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-28 06:02:13,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:02:13,253 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:02:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:02:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 226108014, now seen corresponding path program 1 times [2021-12-28 06:02:13,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:02:13,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485996270] [2021-12-28 06:02:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:02:13,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:02:13,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:02:13,256 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:02:13,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-28 06:02:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:02:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 06:02:13,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:02:13,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 06:02:13,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:02:13,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:02:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485996270] [2021-12-28 06:02:13,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485996270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:02:13,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:02:13,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 06:02:13,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268749944] [2021-12-28 06:02:13,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:02:13,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:02:13,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:02:13,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:02:13,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:02:13,553 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 06:02:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:02:13,999 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2021-12-28 06:02:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 06:02:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-12-28 06:02:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:02:14,000 INFO L225 Difference]: With dead ends: 134 [2021-12-28 06:02:14,000 INFO L226 Difference]: Without dead ends: 134 [2021-12-28 06:02:14,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:02:14,001 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 73 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 06:02:14,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 235 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 06:02:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-28 06:02:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2021-12-28 06:02:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:02:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-12-28 06:02:14,003 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 46 [2021-12-28 06:02:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:02:14,003 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-12-28 06:02:14,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 06:02:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-12-28 06:02:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 06:02:14,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:02:14,004 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 06:02:14,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-28 06:02:14,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:02:14,204 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:02:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:02:14,205 INFO L85 PathProgramCache]: Analyzing trace with hash 226108015, now seen corresponding path program 1 times [2021-12-28 06:02:14,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:02:14,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009544067] [2021-12-28 06:02:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:02:14,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:02:14,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:02:14,207 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:02:14,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-28 06:02:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:02:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 06:02:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:02:14,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 06:02:14,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:02:14,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:02:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009544067] [2021-12-28 06:02:14,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009544067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:02:14,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:02:14,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 06:02:14,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124534065] [2021-12-28 06:02:14,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:02:14,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:02:14,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:02:14,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:02:14,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:02:14,590 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 06:02:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:02:15,015 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-12-28 06:02:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 06:02:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-12-28 06:02:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:02:15,017 INFO L225 Difference]: With dead ends: 112 [2021-12-28 06:02:15,017 INFO L226 Difference]: Without dead ends: 112 [2021-12-28 06:02:15,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:02:15,017 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 73 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 06:02:15,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 246 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 06:02:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-28 06:02:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-28 06:02:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.4102564102564104) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:02:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-12-28 06:02:15,019 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 46 [2021-12-28 06:02:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:02:15,019 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-12-28 06:02:15,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 06:02:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-12-28 06:02:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 06:02:15,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:02:15,020 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 06:02:15,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-28 06:02:15,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:02:15,228 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:02:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:02:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash 226118937, now seen corresponding path program 1 times [2021-12-28 06:02:15,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:02:15,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875544391] [2021-12-28 06:02:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:02:15,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:02:15,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:02:15,234 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:02:15,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-28 06:02:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:02:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-28 06:02:15,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:02:15,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:15,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-12-28 06:02:16,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:16,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-28 06:02:16,190 INFO L353 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-28 06:02:16,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-28 06:02:16,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-28 06:02:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:02:16,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:02:16,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:02:16,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875544391] [2021-12-28 06:02:16,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875544391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:02:16,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [404285155] [2021-12-28 06:02:16,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:02:16,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-28 06:02:16,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-28 06:02:16,516 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-28 06:02:16,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-12-28 06:02:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:02:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-28 06:02:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:02:17,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:17,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-12-28 06:02:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:17,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-28 06:02:17,890 INFO L353 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-28 06:02:17,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-28 06:02:18,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-28 06:02:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:02:18,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:02:18,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [404285155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:02:18,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:02:18,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-12-28 06:02:18,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175984448] [2021-12-28 06:02:18,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:02:18,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-28 06:02:18,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:02:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-28 06:02:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=860, Unknown=3, NotChecked=0, Total=992 [2021-12-28 06:02:18,290 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 30 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-28 06:02:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:02:19,421 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2021-12-28 06:02:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 06:02:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2021-12-28 06:02:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:02:19,422 INFO L225 Difference]: With dead ends: 127 [2021-12-28 06:02:19,422 INFO L226 Difference]: Without dead ends: 127 [2021-12-28 06:02:19,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=240, Invalid=1474, Unknown=8, NotChecked=0, Total=1722 [2021-12-28 06:02:19,424 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 62 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 06:02:19,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 707 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 167 Unchecked, 0.6s Time] [2021-12-28 06:02:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-28 06:02:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2021-12-28 06:02:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 78 states have (on average 1.3974358974358974) internal successors, (109), 104 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:02:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-12-28 06:02:19,459 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 46 [2021-12-28 06:02:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:02:19,460 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-12-28 06:02:19,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-28 06:02:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-12-28 06:02:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 06:02:19,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:02:19,461 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 06:02:19,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-12-28 06:02:19,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-28 06:02:19,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 06:02:19,866 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-28 06:02:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:02:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash 226118938, now seen corresponding path program 1 times [2021-12-28 06:02:19,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 06:02:19,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913063780] [2021-12-28 06:02:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:02:19,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 06:02:19,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 06:02:19,868 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 06:02:19,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-28 06:02:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:02:20,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-28 06:02:20,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:02:20,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:20,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:20,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:20,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:20,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-28 06:02:20,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-28 06:02:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:21,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-28 06:02:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:21,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 06:02:21,344 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-28 06:02:21,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-28 06:02:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:21,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-28 06:02:21,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-28 06:02:21,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 06:02:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:02:21,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:02:22,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 06:02:22,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913063780] [2021-12-28 06:02:22,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913063780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:02:22,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1264810366] [2021-12-28 06:02:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:02:22,243 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-28 06:02:22,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-28 06:02:22,244 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-28 06:02:22,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-12-28 06:02:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:02:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-28 06:02:22,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:02:22,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:22,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 06:02:23,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-28 06:02:23,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-28 06:02:23,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:23,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 06:02:23,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:23,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-28 06:02:23,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:02:23,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-28 06:02:23,982 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-28 06:02:23,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-28 06:02:24,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-28 06:02:24,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 06:02:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:02:24,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:02:24,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1264810366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:02:24,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:02:24,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 31 [2021-12-28 06:02:24,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166535635] [2021-12-28 06:02:24,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:02:24,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-28 06:02:24,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 06:02:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-28 06:02:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1103, Unknown=7, NotChecked=0, Total=1260 [2021-12-28 06:02:24,875 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 32 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6)