./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label48+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label48+token_ring.02.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash abf153d7504404447837d5448d411c139d9bf5ab64e9e6700e63ddfa19d4209f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:01:02,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:01:02,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:01:02,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:01:02,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:01:02,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:01:02,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:01:02,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:01:02,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:01:02,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:01:02,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:01:02,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:01:02,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:01:02,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:01:02,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:01:02,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:01:02,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:01:02,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:01:02,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:01:02,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:01:02,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:01:02,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:01:02,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:01:02,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:01:02,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:01:02,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:01:02,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:01:02,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:01:02,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:01:02,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:01:02,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:01:02,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:01:02,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:01:02,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:01:02,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:01:02,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:01:02,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:01:02,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:01:02,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:01:02,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:01:02,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:01:02,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:01:02,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:01:02,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:01:02,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:01:02,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:01:02,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:01:02,195 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:01:02,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:01:02,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:01:02,196 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:01:02,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:01:02,197 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:01:02,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:01:02,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:01:02,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:01:02,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:01:02,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:01:02,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:01:02,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:01:02,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:01:02,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:01:02,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:01:02,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:01:02,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:01:02,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:01:02,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:01:02,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:01:02,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:01:02,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:01:02,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:01:02,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:01:02,212 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:01:02,213 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:01:02,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:01:02,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abf153d7504404447837d5448d411c139d9bf5ab64e9e6700e63ddfa19d4209f [2021-12-28 02:01:02,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:01:02,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:01:02,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:01:02,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:01:02,496 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:01:02,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label48+token_ring.02.cil-1.c [2021-12-28 02:01:02,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba0a2475f/0ac3ea0f04ed4b76a9a4dc5c1945fa4a/FLAG40afafa60 [2021-12-28 02:01:03,240 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:01:03,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label48+token_ring.02.cil-1.c [2021-12-28 02:01:03,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba0a2475f/0ac3ea0f04ed4b76a9a4dc5c1945fa4a/FLAG40afafa60 [2021-12-28 02:01:03,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba0a2475f/0ac3ea0f04ed4b76a9a4dc5c1945fa4a [2021-12-28 02:01:03,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:01:03,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:01:03,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:01:03,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:01:03,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:01:03,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:01:03" (1/1) ... [2021-12-28 02:01:03,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a5c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:03, skipping insertion in model container [2021-12-28 02:01:03,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:01:03" (1/1) ... [2021-12-28 02:01:03,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:01:03,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:01:04,641 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/combinations/Problem05_label48+token_ring.02.cil-1.c[375709,375722] [2021-12-28 02:01:04,664 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/combinations/Problem05_label48+token_ring.02.cil-1.c[383339,383352] [2021-12-28 02:01:04,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:01:04,813 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:01:05,400 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/combinations/Problem05_label48+token_ring.02.cil-1.c[375709,375722] [2021-12-28 02:01:05,408 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/combinations/Problem05_label48+token_ring.02.cil-1.c[383339,383352] [2021-12-28 02:01:05,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:01:05,464 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:01:05,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05 WrapperNode [2021-12-28 02:01:05,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:01:05,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:01:05,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:01:05,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:01:05,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:05,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:05,844 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-12-28 02:01:05,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:01:05,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:01:05,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:01:05,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:01:05,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:05,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:05,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:05,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:06,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:06,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:06,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:06,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:01:06,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:01:06,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:01:06,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:01:06,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (1/1) ... [2021-12-28 02:01:06,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:01:06,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:06,340 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 02:01:06,391 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 02:01:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:01:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-28 02:01:06,427 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-28 02:01:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-28 02:01:06,427 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-28 02:01:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:01:06,427 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:01:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-28 02:01:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-28 02:01:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-28 02:01:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-28 02:01:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:01:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-28 02:01:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-28 02:01:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:01:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:01:06,567 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:01:06,584 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:01:11,131 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:01:11,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:01:11,150 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-28 02:01:11,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:01:11 BoogieIcfgContainer [2021-12-28 02:01:11,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:01:11,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:01:11,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:01:11,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:01:11,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:01:03" (1/3) ... [2021-12-28 02:01:11,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379390d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:01:11, skipping insertion in model container [2021-12-28 02:01:11,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:05" (2/3) ... [2021-12-28 02:01:11,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379390d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:01:11, skipping insertion in model container [2021-12-28 02:01:11,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:01:11" (3/3) ... [2021-12-28 02:01:11,161 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.02.cil-1.c [2021-12-28 02:01:11,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:01:11,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:01:11,211 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:01:11,215 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 02:01:11,216 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:01:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-28 02:01:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:01:11,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:11,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:11,262 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:11,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:11,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1170312139, now seen corresponding path program 1 times [2021-12-28 02:01:11,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:11,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891170009] [2021-12-28 02:01:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:11,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:11,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:11,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:11,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:11,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:11,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:11,621 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 02:01:11,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:11,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891170009] [2021-12-28 02:01:11,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891170009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:11,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:01:11,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:01:11,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199530499] [2021-12-28 02:01:11,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:11,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:01:11,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:01:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:01:11,669 INFO L87 Difference]: Start difference. First operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:12,486 INFO L93 Difference]: Finished difference Result 4802 states and 8845 transitions. [2021-12-28 02:01:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:01:12,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-28 02:01:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:12,513 INFO L225 Difference]: With dead ends: 4802 [2021-12-28 02:01:12,513 INFO L226 Difference]: Without dead ends: 2427 [2021-12-28 02:01:12,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:01:12,526 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4428 mSDsluCounter, 12428 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 16676 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:12,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 16676 Invalid, 642 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:01:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-12-28 02:01:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2364. [2021-12-28 02:01:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2322 states have (on average 1.8333333333333333) internal successors, (4257), 2325 states have internal predecessors, (4257), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-28 02:01:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4314 transitions. [2021-12-28 02:01:12,645 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4314 transitions. Word has length 68 [2021-12-28 02:01:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:12,646 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4314 transitions. [2021-12-28 02:01:12,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4314 transitions. [2021-12-28 02:01:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:01:12,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:12,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:12,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:01:12,654 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:12,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1597321137, now seen corresponding path program 1 times [2021-12-28 02:01:12,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:12,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978185307] [2021-12-28 02:01:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:12,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:12,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:12,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:12,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:12,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:12,758 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 02:01:12,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:12,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978185307] [2021-12-28 02:01:12,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978185307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:12,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:01:12,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:01:12,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560595879] [2021-12-28 02:01:12,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:12,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:01:12,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:01:12,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:01:12,761 INFO L87 Difference]: Start difference. First operand 2364 states and 4314 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:13,422 INFO L93 Difference]: Finished difference Result 2807 states and 4974 transitions. [2021-12-28 02:01:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:01:13,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-28 02:01:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:13,432 INFO L225 Difference]: With dead ends: 2807 [2021-12-28 02:01:13,432 INFO L226 Difference]: Without dead ends: 2574 [2021-12-28 02:01:13,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:01:13,434 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4351 mSDsluCounter, 16427 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 20673 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:13,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 20673 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:01:13,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-28 02:01:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2473. [2021-12-28 02:01:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2413 states have (on average 1.8188976377952757) internal successors, (4389), 2417 states have internal predecessors, (4389), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-28 02:01:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4470 transitions. [2021-12-28 02:01:13,484 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4470 transitions. Word has length 68 [2021-12-28 02:01:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:13,484 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 4470 transitions. [2021-12-28 02:01:13,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4470 transitions. [2021-12-28 02:01:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:01:13,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:13,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:13,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:01:13,486 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:13,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash -721302131, now seen corresponding path program 1 times [2021-12-28 02:01:13,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:13,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983192082] [2021-12-28 02:01:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:13,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:13,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:13,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:13,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:13,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:13,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:13,577 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 02:01:13,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:13,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983192082] [2021-12-28 02:01:13,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983192082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:13,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:01:13,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:01:13,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590706036] [2021-12-28 02:01:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:13,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:01:13,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:01:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:01:13,583 INFO L87 Difference]: Start difference. First operand 2473 states and 4470 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:14,291 INFO L93 Difference]: Finished difference Result 3193 states and 5538 transitions. [2021-12-28 02:01:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:01:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-28 02:01:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:14,302 INFO L225 Difference]: With dead ends: 3193 [2021-12-28 02:01:14,302 INFO L226 Difference]: Without dead ends: 2851 [2021-12-28 02:01:14,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:01:14,305 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4383 mSDsluCounter, 16249 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4392 SdHoareTripleChecker+Valid, 20418 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:14,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 20418 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:01:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-12-28 02:01:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2692. [2021-12-28 02:01:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2596 states have (on average 1.7927580893682589) internal successors, (4654), 2602 states have internal predecessors, (4654), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-28 02:01:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 4787 transitions. [2021-12-28 02:01:14,369 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 4787 transitions. Word has length 68 [2021-12-28 02:01:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:14,369 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 4787 transitions. [2021-12-28 02:01:14,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 4787 transitions. [2021-12-28 02:01:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:01:14,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:14,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:14,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:01:14,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash -277401457, now seen corresponding path program 1 times [2021-12-28 02:01:14,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:14,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603399388] [2021-12-28 02:01:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:14,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:14,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:14,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:14,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:14,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:14,436 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 02:01:14,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603399388] [2021-12-28 02:01:14,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603399388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:14,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:01:14,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:01:14,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781717016] [2021-12-28 02:01:14,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:14,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:01:14,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:14,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:01:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:01:14,439 INFO L87 Difference]: Start difference. First operand 2692 states and 4787 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:15,255 INFO L93 Difference]: Finished difference Result 4037 states and 6769 transitions. [2021-12-28 02:01:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:01:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-28 02:01:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:15,270 INFO L225 Difference]: With dead ends: 4037 [2021-12-28 02:01:15,271 INFO L226 Difference]: Without dead ends: 3476 [2021-12-28 02:01:15,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:01:15,282 INFO L933 BasicCegarLoop]: 4255 mSDtfsCounter, 4357 mSDsluCounter, 16416 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4365 SdHoareTripleChecker+Valid, 20671 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:15,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4365 Valid, 20671 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:01:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-28 02:01:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 3104. [2021-12-28 02:01:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2940 states have (on average 1.7530612244897958) internal successors, (5154), 2950 states have internal predecessors, (5154), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-28 02:01:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5389 transitions. [2021-12-28 02:01:15,437 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5389 transitions. Word has length 68 [2021-12-28 02:01:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:15,438 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5389 transitions. [2021-12-28 02:01:15,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5389 transitions. [2021-12-28 02:01:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:01:15,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:15,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:15,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:01:15,439 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1988979729, now seen corresponding path program 1 times [2021-12-28 02:01:15,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:15,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122444162] [2021-12-28 02:01:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:15,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:15,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:15,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:15,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:15,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:15,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:15,500 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 02:01:15,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:15,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122444162] [2021-12-28 02:01:15,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122444162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:15,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:01:15,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:01:15,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554834925] [2021-12-28 02:01:15,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:15,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:01:15,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:01:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:01:15,502 INFO L87 Difference]: Start difference. First operand 3104 states and 5389 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:16,206 INFO L93 Difference]: Finished difference Result 5435 states and 8809 transitions. [2021-12-28 02:01:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:01:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-28 02:01:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:16,222 INFO L225 Difference]: With dead ends: 5435 [2021-12-28 02:01:16,222 INFO L226 Difference]: Without dead ends: 4462 [2021-12-28 02:01:16,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:01:16,227 INFO L933 BasicCegarLoop]: 4224 mSDtfsCounter, 4362 mSDsluCounter, 16419 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 20643 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:16,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4374 Valid, 20643 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:01:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-12-28 02:01:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 3941. [2021-12-28 02:01:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3645 states have (on average 1.696570644718793) internal successors, (6184), 3663 states have internal predecessors, (6184), 176 states have call successors, (176), 102 states have call predecessors, (176), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2021-12-28 02:01:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 6633 transitions. [2021-12-28 02:01:16,330 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 6633 transitions. Word has length 68 [2021-12-28 02:01:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:16,331 INFO L470 AbstractCegarLoop]: Abstraction has 3941 states and 6633 transitions. [2021-12-28 02:01:16,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 6633 transitions. [2021-12-28 02:01:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:01:16,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:16,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:16,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:01:16,334 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:16,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1507899471, now seen corresponding path program 1 times [2021-12-28 02:01:16,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:16,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810122416] [2021-12-28 02:01:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:16,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:16,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:16,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:16,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:16,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:16,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:16,387 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 02:01:16,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810122416] [2021-12-28 02:01:16,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810122416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:16,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:01:16,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:01:16,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203506640] [2021-12-28 02:01:16,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:16,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:01:16,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:01:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:01:16,389 INFO L87 Difference]: Start difference. First operand 3941 states and 6633 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:17,006 INFO L93 Difference]: Finished difference Result 7278 states and 11576 transitions. [2021-12-28 02:01:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:01:17,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-28 02:01:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:17,025 INFO L225 Difference]: With dead ends: 7278 [2021-12-28 02:01:17,025 INFO L226 Difference]: Without dead ends: 5469 [2021-12-28 02:01:17,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:01:17,032 INFO L933 BasicCegarLoop]: 4300 mSDtfsCounter, 4485 mSDsluCounter, 12242 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4510 SdHoareTripleChecker+Valid, 16542 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:17,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4510 Valid, 16542 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:01:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2021-12-28 02:01:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 4882. [2021-12-28 02:01:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4882 states, 4428 states have (on average 1.6456639566395663) internal successors, (7287), 4463 states have internal predecessors, (7287), 272 states have call successors, (272), 156 states have call predecessors, (272), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2021-12-28 02:01:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4882 states to 4882 states and 7956 transitions. [2021-12-28 02:01:17,160 INFO L78 Accepts]: Start accepts. Automaton has 4882 states and 7956 transitions. Word has length 68 [2021-12-28 02:01:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:17,161 INFO L470 AbstractCegarLoop]: Abstraction has 4882 states and 7956 transitions. [2021-12-28 02:01:17,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:01:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4882 states and 7956 transitions. [2021-12-28 02:01:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 02:01:17,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:17,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:17,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:01:17,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1262348608, now seen corresponding path program 1 times [2021-12-28 02:01:17,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:17,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723224471] [2021-12-28 02:01:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:17,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:01:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:01:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 02:01:17,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:17,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723224471] [2021-12-28 02:01:17,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723224471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:01:17,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113189441] [2021-12-28 02:01:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:17,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:17,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:17,253 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 02:01:17,259 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 02:01:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:01:17,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:01:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 02:01:17,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:01:17,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113189441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:17,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:01:17,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 02:01:17,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934688168] [2021-12-28 02:01:17,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:17,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:01:17,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:17,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:01:17,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:17,480 INFO L87 Difference]: Start difference. First operand 4882 states and 7956 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:01:17,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:17,617 INFO L93 Difference]: Finished difference Result 10239 states and 15790 transitions. [2021-12-28 02:01:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:01:17,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-12-28 02:01:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:17,644 INFO L225 Difference]: With dead ends: 10239 [2021-12-28 02:01:17,644 INFO L226 Difference]: Without dead ends: 7489 [2021-12-28 02:01:17,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:17,654 INFO L933 BasicCegarLoop]: 4150 mSDtfsCounter, 4098 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4309 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:17,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4309 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:01:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7489 states. [2021-12-28 02:01:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7489 to 7435. [2021-12-28 02:01:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 6567 states have (on average 1.5784985533729252) internal successors, (10366), 6635 states have internal predecessors, (10366), 510 states have call successors, (510), 308 states have call predecessors, (510), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2021-12-28 02:01:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 11621 transitions. [2021-12-28 02:01:17,974 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 11621 transitions. Word has length 110 [2021-12-28 02:01:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:17,975 INFO L470 AbstractCegarLoop]: Abstraction has 7435 states and 11621 transitions. [2021-12-28 02:01:17,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:01:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 11621 transitions. [2021-12-28 02:01:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 02:01:17,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:17,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:18,003 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 02:01:18,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:18,200 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1095009120, now seen corresponding path program 1 times [2021-12-28 02:01:18,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:18,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357649867] [2021-12-28 02:01:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:18,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:01:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:01:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 02:01:18,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357649867] [2021-12-28 02:01:18,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357649867] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:01:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832487422] [2021-12-28 02:01:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:18,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:18,291 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 02:01:18,292 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 02:01:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:18,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:01:18,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:01:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:01:18,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:01:18,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832487422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:18,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:01:18,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:01:18,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375571470] [2021-12-28 02:01:18,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:18,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:01:18,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:01:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:18,496 INFO L87 Difference]: Start difference. First operand 7435 states and 11621 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:01:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:18,751 INFO L93 Difference]: Finished difference Result 17751 states and 26795 transitions. [2021-12-28 02:01:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:01:18,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2021-12-28 02:01:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:18,804 INFO L225 Difference]: With dead ends: 17751 [2021-12-28 02:01:18,805 INFO L226 Difference]: Without dead ends: 12449 [2021-12-28 02:01:18,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:18,823 INFO L933 BasicCegarLoop]: 4299 mSDtfsCounter, 154 mSDsluCounter, 4138 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8437 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:18,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 8437 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:01:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-12-28 02:01:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 12449. [2021-12-28 02:01:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12449 states, 10768 states have (on average 1.5169947994056463) internal successors, (16335), 10885 states have internal predecessors, (16335), 975 states have call successors, (975), 608 states have call predecessors, (975), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2021-12-28 02:01:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12449 states to 12449 states and 18906 transitions. [2021-12-28 02:01:19,328 INFO L78 Accepts]: Start accepts. Automaton has 12449 states and 18906 transitions. Word has length 110 [2021-12-28 02:01:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:19,329 INFO L470 AbstractCegarLoop]: Abstraction has 12449 states and 18906 transitions. [2021-12-28 02:01:19,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:01:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 12449 states and 18906 transitions. [2021-12-28 02:01:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-28 02:01:19,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:19,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:19,375 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 02:01:19,575 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,SelfDestructingSolverStorable7 [2021-12-28 02:01:19,575 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:19,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1627368555, now seen corresponding path program 1 times [2021-12-28 02:01:19,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:19,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759872593] [2021-12-28 02:01:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:19,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:01:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:01:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:01:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 02:01:19,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:19,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759872593] [2021-12-28 02:01:19,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759872593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:01:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186454285] [2021-12-28 02:01:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:19,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:19,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:19,698 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 02:01:19,699 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 02:01:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:19,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:01:19,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:01:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:01:19,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:01:19,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186454285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:19,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:01:19,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 02:01:19,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329049595] [2021-12-28 02:01:19,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:19,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:01:19,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:19,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:01:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:19,972 INFO L87 Difference]: Start difference. First operand 12449 states and 18906 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 02:01:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:20,592 INFO L93 Difference]: Finished difference Result 32641 states and 48463 transitions. [2021-12-28 02:01:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:01:20,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 142 [2021-12-28 02:01:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:20,680 INFO L225 Difference]: With dead ends: 32641 [2021-12-28 02:01:20,681 INFO L226 Difference]: Without dead ends: 22329 [2021-12-28 02:01:20,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:20,730 INFO L933 BasicCegarLoop]: 4159 mSDtfsCounter, 4056 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4056 SdHoareTripleChecker+Valid, 4318 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:20,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4056 Valid, 4318 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:01:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22329 states. [2021-12-28 02:01:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22329 to 22119. [2021-12-28 02:01:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22119 states, 18858 states have (on average 1.4761374482978047) internal successors, (27837), 19089 states have internal predecessors, (27837), 1869 states have call successors, (1869), 1198 states have call predecessors, (1869), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2021-12-28 02:01:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22119 states to 22119 states and 32744 transitions. [2021-12-28 02:01:21,579 INFO L78 Accepts]: Start accepts. Automaton has 22119 states and 32744 transitions. Word has length 142 [2021-12-28 02:01:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:21,580 INFO L470 AbstractCegarLoop]: Abstraction has 22119 states and 32744 transitions. [2021-12-28 02:01:21,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 02:01:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 22119 states and 32744 transitions. [2021-12-28 02:01:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 02:01:21,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:21,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:21,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:01:21,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:21,851 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2072719309, now seen corresponding path program 1 times [2021-12-28 02:01:21,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:21,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4203420] [2021-12-28 02:01:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:21,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 02:01:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:01:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 02:01:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 02:01:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-28 02:01:21,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:21,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4203420] [2021-12-28 02:01:21,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4203420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:01:21,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831491321] [2021-12-28 02:01:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:21,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:21,964 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 02:01:21,965 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 02:01:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:22,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:01:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:01:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:01:22,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:01:22,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831491321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:22,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:01:22,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:01:22,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607235227] [2021-12-28 02:01:22,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:22,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:01:22,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:01:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:22,233 INFO L87 Difference]: Start difference. First operand 22119 states and 32744 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:01:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:22,967 INFO L93 Difference]: Finished difference Result 44457 states and 65784 transitions. [2021-12-28 02:01:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:01:22,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2021-12-28 02:01:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:23,052 INFO L225 Difference]: With dead ends: 44457 [2021-12-28 02:01:23,052 INFO L226 Difference]: Without dead ends: 24473 [2021-12-28 02:01:23,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:23,104 INFO L933 BasicCegarLoop]: 4137 mSDtfsCounter, 4075 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4075 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:23,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4075 Valid, 4171 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:01:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24473 states. [2021-12-28 02:01:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24473 to 24473. [2021-12-28 02:01:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24473 states, 21000 states have (on average 1.4191904761904761) internal successors, (29803), 21231 states have internal predecessors, (29803), 1923 states have call successors, (1923), 1356 states have call predecessors, (1923), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2021-12-28 02:01:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24473 states to 24473 states and 34832 transitions. [2021-12-28 02:01:24,021 INFO L78 Accepts]: Start accepts. Automaton has 24473 states and 34832 transitions. Word has length 159 [2021-12-28 02:01:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:24,021 INFO L470 AbstractCegarLoop]: Abstraction has 24473 states and 34832 transitions. [2021-12-28 02:01:24,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:01:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 24473 states and 34832 transitions. [2021-12-28 02:01:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 02:01:24,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:24,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:24,108 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 02:01:24,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:24,309 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash -830749066, now seen corresponding path program 1 times [2021-12-28 02:01:24,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:24,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719972309] [2021-12-28 02:01:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:24,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 02:01:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:01:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 02:01:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 02:01:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-28 02:01:24,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:24,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719972309] [2021-12-28 02:01:24,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719972309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:01:24,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861904226] [2021-12-28 02:01:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:24,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:24,422 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 02:01:24,423 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 02:01:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:24,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:01:24,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:01:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-28 02:01:24,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:01:24,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861904226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:24,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:01:24,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:01:24,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041241433] [2021-12-28 02:01:24,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:24,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:01:24,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:01:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:24,717 INFO L87 Difference]: Start difference. First operand 24473 states and 34832 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:01:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:25,563 INFO L93 Difference]: Finished difference Result 41324 states and 58008 transitions. [2021-12-28 02:01:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:01:25,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2021-12-28 02:01:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:25,649 INFO L225 Difference]: With dead ends: 41324 [2021-12-28 02:01:25,650 INFO L226 Difference]: Without dead ends: 26013 [2021-12-28 02:01:25,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:25,685 INFO L933 BasicCegarLoop]: 4159 mSDtfsCounter, 4088 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4325 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:25,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 4325 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:01:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26013 states. [2021-12-28 02:01:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26013 to 25873. [2021-12-28 02:01:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25873 states, 22288 states have (on average 1.3940685570710696) internal successors, (31071), 22519 states have internal predecessors, (31071), 1943 states have call successors, (1943), 1448 states have call predecessors, (1943), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2021-12-28 02:01:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25873 states to 25873 states and 36232 transitions. [2021-12-28 02:01:26,830 INFO L78 Accepts]: Start accepts. Automaton has 25873 states and 36232 transitions. Word has length 159 [2021-12-28 02:01:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:26,831 INFO L470 AbstractCegarLoop]: Abstraction has 25873 states and 36232 transitions. [2021-12-28 02:01:26,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:01:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 25873 states and 36232 transitions. [2021-12-28 02:01:26,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:01:26,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:26,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:26,889 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 02:01:27,087 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,SelfDestructingSolverStorable10 [2021-12-28 02:01:27,087 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash -609804947, now seen corresponding path program 1 times [2021-12-28 02:01:27,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:27,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723543612] [2021-12-28 02:01:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:27,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:01:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:01:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 02:01:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:01:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-28 02:01:27,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:27,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723543612] [2021-12-28 02:01:27,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723543612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:01:27,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870752032] [2021-12-28 02:01:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:27,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:27,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:27,176 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 02:01:27,195 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 02:01:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:27,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:01:27,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:01:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-28 02:01:27,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:01:27,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870752032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:27,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:01:27,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:01:27,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467010858] [2021-12-28 02:01:27,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:27,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:01:27,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:01:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:27,421 INFO L87 Difference]: Start difference. First operand 25873 states and 36232 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:01:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:28,585 INFO L93 Difference]: Finished difference Result 70245 states and 97750 transitions. [2021-12-28 02:01:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:01:28,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-28 02:01:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:28,752 INFO L225 Difference]: With dead ends: 70245 [2021-12-28 02:01:28,753 INFO L226 Difference]: Without dead ends: 46511 [2021-12-28 02:01:28,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:28,806 INFO L933 BasicCegarLoop]: 4172 mSDtfsCounter, 4102 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 4334 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:28,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4102 Valid, 4334 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:01:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46511 states. [2021-12-28 02:01:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46511 to 45781. [2021-12-28 02:01:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45781 states, 39030 states have (on average 1.3636945939021266) internal successors, (53225), 39491 states have internal predecessors, (53225), 3677 states have call successors, (3677), 2688 states have call predecessors, (3677), 3072 states have return successors, (7178), 3665 states have call predecessors, (7178), 3677 states have call successors, (7178) [2021-12-28 02:01:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45781 states to 45781 states and 64080 transitions. [2021-12-28 02:01:30,528 INFO L78 Accepts]: Start accepts. Automaton has 45781 states and 64080 transitions. Word has length 160 [2021-12-28 02:01:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:30,529 INFO L470 AbstractCegarLoop]: Abstraction has 45781 states and 64080 transitions. [2021-12-28 02:01:30,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:01:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45781 states and 64080 transitions. [2021-12-28 02:01:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:01:30,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:30,608 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:30,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 02:01:30,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:30,824 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:30,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash -757749610, now seen corresponding path program 1 times [2021-12-28 02:01:30,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:30,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031248451] [2021-12-28 02:01:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:30,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:01:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:01:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:01:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:01:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-28 02:01:30,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031248451] [2021-12-28 02:01:30,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031248451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:01:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862038214] [2021-12-28 02:01:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:30,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:30,923 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 02:01:30,939 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 02:01:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:01:31,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:01:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 02:01:31,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:01:31,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862038214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:31,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:01:31,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:01:31,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542665007] [2021-12-28 02:01:31,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:31,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:01:31,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:01:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:31,227 INFO L87 Difference]: Start difference. First operand 45781 states and 64080 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:01:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:32,636 INFO L93 Difference]: Finished difference Result 75161 states and 105873 transitions. [2021-12-28 02:01:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:01:32,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-28 02:01:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:32,769 INFO L225 Difference]: With dead ends: 75161 [2021-12-28 02:01:32,769 INFO L226 Difference]: Without dead ends: 40527 [2021-12-28 02:01:32,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:32,843 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4089 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 4169 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:32,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 4169 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:01:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40527 states. [2021-12-28 02:01:34,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40527 to 29943. [2021-12-28 02:01:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29943 states, 25784 states have (on average 1.3390862550418865) internal successors, (34527), 26025 states have internal predecessors, (34527), 2245 states have call successors, (2245), 1720 states have call predecessors, (2245), 1912 states have return successors, (3934), 2229 states have call predecessors, (3934), 2245 states have call successors, (3934) [2021-12-28 02:01:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29943 states to 29943 states and 40706 transitions. [2021-12-28 02:01:34,273 INFO L78 Accepts]: Start accepts. Automaton has 29943 states and 40706 transitions. Word has length 160 [2021-12-28 02:01:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:34,274 INFO L470 AbstractCegarLoop]: Abstraction has 29943 states and 40706 transitions. [2021-12-28 02:01:34,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:01:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 29943 states and 40706 transitions. [2021-12-28 02:01:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:01:34,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:34,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:34,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 02:01:34,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:34,530 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1793650834, now seen corresponding path program 1 times [2021-12-28 02:01:34,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:34,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239150885] [2021-12-28 02:01:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:34,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:01:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:01:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:01:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:01:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-28 02:01:34,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:34,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239150885] [2021-12-28 02:01:34,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239150885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:01:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172175722] [2021-12-28 02:01:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:34,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:34,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:34,625 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:01:34,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 02:01:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:34,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:01:34,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:01:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 02:01:34,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:01:34,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172175722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:34,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:01:34,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:01:34,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181231419] [2021-12-28 02:01:34,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:34,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:01:34,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:01:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:34,927 INFO L87 Difference]: Start difference. First operand 29943 states and 40706 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:01:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:36,850 INFO L93 Difference]: Finished difference Result 82801 states and 112154 transitions. [2021-12-28 02:01:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:01:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-28 02:01:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:37,157 INFO L225 Difference]: With dead ends: 82801 [2021-12-28 02:01:37,157 INFO L226 Difference]: Without dead ends: 55005 [2021-12-28 02:01:37,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:37,208 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 4098 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4341 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:37,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4341 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:01:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55005 states. [2021-12-28 02:01:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55005 to 53491. [2021-12-28 02:01:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53491 states, 45624 states have (on average 1.3054751884972822) internal successors, (59561), 46105 states have internal predecessors, (59561), 4265 states have call successors, (4265), 3216 states have call predecessors, (4265), 3600 states have return successors, (8740), 4233 states have call predecessors, (8740), 4265 states have call successors, (8740) [2021-12-28 02:01:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53491 states to 53491 states and 72566 transitions. [2021-12-28 02:01:39,452 INFO L78 Accepts]: Start accepts. Automaton has 53491 states and 72566 transitions. Word has length 160 [2021-12-28 02:01:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:39,453 INFO L470 AbstractCegarLoop]: Abstraction has 53491 states and 72566 transitions. [2021-12-28 02:01:39,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:01:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 53491 states and 72566 transitions. [2021-12-28 02:01:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:01:39,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:39,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:39,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 02:01:39,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 02:01:39,764 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash -392345557, now seen corresponding path program 1 times [2021-12-28 02:01:39,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:39,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404923620] [2021-12-28 02:01:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:39,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:01:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:01:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 02:01:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:01:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-28 02:01:39,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404923620] [2021-12-28 02:01:39,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404923620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:39,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:01:39,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:01:39,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885961713] [2021-12-28 02:01:39,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:39,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:01:39,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:39,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:01:39,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:01:39,837 INFO L87 Difference]: Start difference. First operand 53491 states and 72566 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:01:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:41,908 INFO L93 Difference]: Finished difference Result 102539 states and 136687 transitions. [2021-12-28 02:01:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:01:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-28 02:01:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:42,077 INFO L225 Difference]: With dead ends: 102539 [2021-12-28 02:01:42,077 INFO L226 Difference]: Without dead ends: 51193 [2021-12-28 02:01:42,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:42,170 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 282 mSDsluCounter, 12001 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16137 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:42,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16137 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:01:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51193 states. [2021-12-28 02:01:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51193 to 48475. [2021-12-28 02:01:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48475 states, 41692 states have (on average 1.3054542837954524) internal successors, (54427), 42585 states have internal predecessors, (54427), 3253 states have call successors, (3253), 2472 states have call predecessors, (3253), 3528 states have return successors, (7133), 3449 states have call predecessors, (7133), 3253 states have call successors, (7133) [2021-12-28 02:01:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48475 states to 48475 states and 64813 transitions. [2021-12-28 02:01:44,592 INFO L78 Accepts]: Start accepts. Automaton has 48475 states and 64813 transitions. Word has length 160 [2021-12-28 02:01:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:44,593 INFO L470 AbstractCegarLoop]: Abstraction has 48475 states and 64813 transitions. [2021-12-28 02:01:44,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:01:44,593 INFO L276 IsEmpty]: Start isEmpty. Operand 48475 states and 64813 transitions. [2021-12-28 02:01:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:01:44,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:44,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:01:44,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:01:44,657 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash -809968940, now seen corresponding path program 1 times [2021-12-28 02:01:44,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:44,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303686445] [2021-12-28 02:01:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:44,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:01:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:01:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:01:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:01:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-28 02:01:44,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:44,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303686445] [2021-12-28 02:01:44,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303686445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:44,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:01:44,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:01:44,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554971951] [2021-12-28 02:01:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:44,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:01:44,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:01:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:01:44,714 INFO L87 Difference]: Start difference. First operand 48475 states and 64813 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:01:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:46,559 INFO L93 Difference]: Finished difference Result 86015 states and 113686 transitions. [2021-12-28 02:01:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:01:46,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-28 02:01:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:46,676 INFO L225 Difference]: With dead ends: 86015 [2021-12-28 02:01:46,677 INFO L226 Difference]: Without dead ends: 39677 [2021-12-28 02:01:46,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:46,751 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 282 mSDsluCounter, 12000 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16135 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:46,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16135 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:01:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39677 states. [2021-12-28 02:01:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39677 to 37027. [2021-12-28 02:01:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37027 states, 31990 states have (on average 1.3210690840887778) internal successors, (42261), 32627 states have internal predecessors, (42261), 2427 states have call successors, (2427), 1856 states have call predecessors, (2427), 2608 states have return successors, (4967), 2559 states have call predecessors, (4967), 2427 states have call successors, (4967) [2021-12-28 02:01:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37027 states to 37027 states and 49655 transitions. [2021-12-28 02:01:48,614 INFO L78 Accepts]: Start accepts. Automaton has 37027 states and 49655 transitions. Word has length 160 [2021-12-28 02:01:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:01:48,614 INFO L470 AbstractCegarLoop]: Abstraction has 37027 states and 49655 transitions. [2021-12-28 02:01:48,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:01:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 37027 states and 49655 transitions. [2021-12-28 02:01:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 02:01:48,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:01:48,656 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:48,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:01:48,656 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:01:48,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:01:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1498858591, now seen corresponding path program 1 times [2021-12-28 02:01:48,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:01:48,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984542567] [2021-12-28 02:01:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:48,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:01:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:01:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:01:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:01:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:01:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:01:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:01:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:01:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:01:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:01:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-28 02:01:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-28 02:01:48,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:01:48,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984542567] [2021-12-28 02:01:48,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984542567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:01:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479861316] [2021-12-28 02:01:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:01:48,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:01:48,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:01:48,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:01:48,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 02:01:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:01:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:01:48,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:01:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 02:01:49,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:01:49,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479861316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:01:49,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:01:49,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:01:49,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461790310] [2021-12-28 02:01:49,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:01:49,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:01:49,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:01:49,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:01:49,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:49,062 INFO L87 Difference]: Start difference. First operand 37027 states and 49655 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:01:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:01:50,377 INFO L93 Difference]: Finished difference Result 60935 states and 83299 transitions. [2021-12-28 02:01:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:01:50,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-28 02:01:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:01:50,481 INFO L225 Difference]: With dead ends: 60935 [2021-12-28 02:01:50,482 INFO L226 Difference]: Without dead ends: 37197 [2021-12-28 02:01:50,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:01:50,666 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 130 mSDsluCounter, 4115 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 8382 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:01:50,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 8382 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:01:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37197 states.