./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/loops-crafted-1/mono-crafted_13.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 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:54:02,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:54:02,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:54:02,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:54:02,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:54:02,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:54:02,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:54:02,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:54:02,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:54:02,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:54:02,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:54:02,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:54:02,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:54:02,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:54:02,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:54:02,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:54:02,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:54:02,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:54:02,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:54:02,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:54:02,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:54:02,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:54:02,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:54:02,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:54:02,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:54:02,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:54:02,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:54:02,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:54:02,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:54:02,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:54:02,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:54:02,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:54:02,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:54:02,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:54:02,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:54:02,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:54:02,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:54:02,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:54:02,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:54:02,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:54:02,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:54:02,370 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:54:02,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:54:02,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:54:02,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:54:02,394 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:54:02,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:54:02,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:54:02,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:54:02,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:54:02,395 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:54:02,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:54:02,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:54:02,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:54:02,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:54:02,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:54:02,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:54:02,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:54:02,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:54:02,397 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:54:02,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:54:02,397 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:54:02,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:54:02,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:54:02,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:54:02,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:54:02,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:54:02,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:54:02,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:54:02,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:54:02,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:54:02,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:54:02,399 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:54:02,399 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:54:02,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:54:02,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:54:02,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 [2021-12-14 13:54:02,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:54:02,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:54:02,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:54:02,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:54:02,623 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:54:02,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2021-12-14 13:54:02,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010618c9f/d5d1e98630dd4867bc0e3b9c9ab1c73e/FLAG226b900c1 [2021-12-14 13:54:03,026 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:54:03,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2021-12-14 13:54:03,029 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010618c9f/d5d1e98630dd4867bc0e3b9c9ab1c73e/FLAG226b900c1 [2021-12-14 13:54:03,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010618c9f/d5d1e98630dd4867bc0e3b9c9ab1c73e [2021-12-14 13:54:03,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:54:03,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:54:03,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:54:03,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:54:03,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:54:03,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a161f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03, skipping insertion in model container [2021-12-14 13:54:03,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:54:03,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:54:03,159 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/loops-crafted-1/mono-crafted_13.c[319,332] [2021-12-14 13:54:03,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:54:03,171 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:54:03,178 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/loops-crafted-1/mono-crafted_13.c[319,332] [2021-12-14 13:54:03,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:54:03,190 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:54:03,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03 WrapperNode [2021-12-14 13:54:03,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:54:03,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:54:03,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:54:03,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:54:03,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,209 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2021-12-14 13:54:03,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:54:03,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:54:03,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:54:03,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:54:03,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:54:03,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:54:03,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:54:03,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:54:03,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (1/1) ... [2021-12-14 13:54:03,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:54:03,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:03,241 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) [2021-12-14 13:54:03,245 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 [2021-12-14 13:54:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:54:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:54:03,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:54:03,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:54:03,312 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:54:03,313 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:54:03,405 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:54:03,410 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:54:03,411 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 13:54:03,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:54:03 BoogieIcfgContainer [2021-12-14 13:54:03,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:54:03,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:54:03,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:54:03,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:54:03,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:54:03" (1/3) ... [2021-12-14 13:54:03,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff1eeef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:54:03, skipping insertion in model container [2021-12-14 13:54:03,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:03" (2/3) ... [2021-12-14 13:54:03,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff1eeef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:54:03, skipping insertion in model container [2021-12-14 13:54:03,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:54:03" (3/3) ... [2021-12-14 13:54:03,419 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2021-12-14 13:54:03,426 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:54:03,426 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:54:03,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:54:03,459 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 [2021-12-14 13:54:03,459 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:54:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 13:54:03,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:03,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:03,483 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2021-12-14 13:54:03,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:03,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371531818] [2021-12-14 13:54:03,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:03,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:03,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:03,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371531818] [2021-12-14 13:54:03,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371531818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:54:03,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:54:03,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 13:54:03,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801049855] [2021-12-14 13:54:03,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:54:03,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 13:54:03,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 13:54:03,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:54:03,626 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:03,649 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-12-14 13:54:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 13:54:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 13:54:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:03,655 INFO L225 Difference]: With dead ends: 22 [2021-12-14 13:54:03,655 INFO L226 Difference]: Without dead ends: 9 [2021-12-14 13:54:03,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:54:03,659 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:03,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-14 13:54:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-14 13:54:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-12-14 13:54:03,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-12-14 13:54:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:03,678 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-12-14 13:54:03,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-12-14 13:54:03,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 13:54:03,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:03,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:03,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:54:03,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2021-12-14 13:54:03,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:03,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007823556] [2021-12-14 13:54:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:03,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:03,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:03,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007823556] [2021-12-14 13:54:03,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007823556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:54:03,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:54:03,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:54:03,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508075585] [2021-12-14 13:54:03,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:54:03,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:54:03,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:03,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:54:03,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:54:03,767 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:03,791 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2021-12-14 13:54:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:54:03,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 13:54:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:03,792 INFO L225 Difference]: With dead ends: 18 [2021-12-14 13:54:03,793 INFO L226 Difference]: Without dead ends: 11 [2021-12-14 13:54:03,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:54:03,794 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:03,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-14 13:54:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-14 13:54:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-12-14 13:54:03,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-12-14 13:54:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:03,801 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-12-14 13:54:03,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-12-14 13:54:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 13:54:03,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:03,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:03,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 13:54:03,805 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2021-12-14 13:54:03,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:03,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423236652] [2021-12-14 13:54:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:03,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:03,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:03,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423236652] [2021-12-14 13:54:03,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423236652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:03,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888662967] [2021-12-14 13:54:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:03,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:03,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:03,838 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) [2021-12-14 13:54:03,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:54:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 13:54:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:03,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:03,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888662967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:03,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:03,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 13:54:03,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467528618] [2021-12-14 13:54:03,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:03,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 13:54:03,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 13:54:03,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:54:03,971 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:03,997 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2021-12-14 13:54:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:54:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-14 13:54:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:03,998 INFO L225 Difference]: With dead ends: 22 [2021-12-14 13:54:03,999 INFO L226 Difference]: Without dead ends: 15 [2021-12-14 13:54:03,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:54:04,001 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:04,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:04,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-14 13:54:04,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-14 13:54:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-14 13:54:04,005 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2021-12-14 13:54:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:04,005 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-14 13:54:04,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-14 13:54:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 13:54:04,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:04,006 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:04,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:04,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:04,211 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:04,212 INFO L85 PathProgramCache]: Analyzing trace with hash 571958019, now seen corresponding path program 1 times [2021-12-14 13:54:04,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:04,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862197827] [2021-12-14 13:54:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:04,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:04,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862197827] [2021-12-14 13:54:04,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862197827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452767235] [2021-12-14 13:54:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:04,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:04,289 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) [2021-12-14 13:54:04,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:54:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:04,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:54:04,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:04,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:04,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452767235] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:04,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:04,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-14 13:54:04,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685509896] [2021-12-14 13:54:04,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:04,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 13:54:04,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:04,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 13:54:04,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:54:04,388 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:04,440 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-12-14 13:54:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 13:54:04,441 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-14 13:54:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:04,441 INFO L225 Difference]: With dead ends: 30 [2021-12-14 13:54:04,441 INFO L226 Difference]: Without dead ends: 22 [2021-12-14 13:54:04,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:54:04,442 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:04,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-14 13:54:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-14 13:54:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-14 13:54:04,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2021-12-14 13:54:04,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:04,450 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-14 13:54:04,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-14 13:54:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 13:54:04,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:04,451 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:04,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 13:54:04,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-14 13:54:04,659 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:04,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:04,659 INFO L85 PathProgramCache]: Analyzing trace with hash -870720137, now seen corresponding path program 2 times [2021-12-14 13:54:04,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:04,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897272926] [2021-12-14 13:54:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:04,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:04,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:04,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897272926] [2021-12-14 13:54:04,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897272926] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:04,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942585056] [2021-12-14 13:54:04,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:54:04,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:04,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:04,722 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) [2021-12-14 13:54:04,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:54:04,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:54:04,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 13:54:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:04,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:04,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942585056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:04,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:04,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-14 13:54:04,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425310145] [2021-12-14 13:54:04,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:04,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 13:54:04,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:04,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 13:54:04,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-14 13:54:04,932 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:04,978 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-12-14 13:54:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 13:54:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-14 13:54:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:04,980 INFO L225 Difference]: With dead ends: 46 [2021-12-14 13:54:04,980 INFO L226 Difference]: Without dead ends: 38 [2021-12-14 13:54:04,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-14 13:54:04,981 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:04,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-14 13:54:04,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-14 13:54:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-14 13:54:04,987 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2021-12-14 13:54:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:04,987 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-14 13:54:04,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-14 13:54:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 13:54:04,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:04,988 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:05,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:05,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:05,192 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:05,192 INFO L85 PathProgramCache]: Analyzing trace with hash 114013791, now seen corresponding path program 3 times [2021-12-14 13:54:05,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:05,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87518836] [2021-12-14 13:54:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:05,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:05,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:05,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87518836] [2021-12-14 13:54:05,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87518836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:05,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319961372] [2021-12-14 13:54:05,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:54:05,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:05,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:05,330 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) [2021-12-14 13:54:05,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:54:05,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 13:54:05,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:05,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:54:05,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-14 13:54:05,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:54:05,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319961372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:54:05,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 13:54:05,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2021-12-14 13:54:05,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690868500] [2021-12-14 13:54:05,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:54:05,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:54:05,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:05,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:54:05,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-12-14 13:54:05,521 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:05,531 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-12-14 13:54:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:54:05,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-14 13:54:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:05,532 INFO L225 Difference]: With dead ends: 46 [2021-12-14 13:54:05,532 INFO L226 Difference]: Without dead ends: 42 [2021-12-14 13:54:05,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-12-14 13:54:05,533 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 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 [2021-12-14 13:54:05,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-14 13:54:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-12-14 13:54:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-12-14 13:54:05,536 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2021-12-14 13:54:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:05,537 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-12-14 13:54:05,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-12-14 13:54:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 13:54:05,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:05,537 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:05,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:05,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:05,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:05,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2048604129, now seen corresponding path program 1 times [2021-12-14 13:54:05,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:05,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048316514] [2021-12-14 13:54:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:05,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:05,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:05,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048316514] [2021-12-14 13:54:05,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048316514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:05,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459218594] [2021-12-14 13:54:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:05,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:05,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:05,896 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) [2021-12-14 13:54:05,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:54:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:05,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 13:54:05,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:06,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:06,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459218594] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:06,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:06,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-14 13:54:06,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469651562] [2021-12-14 13:54:06,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:06,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 13:54:06,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:06,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 13:54:06,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 13:54:06,341 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:06,420 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2021-12-14 13:54:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 13:54:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 13:54:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:06,422 INFO L225 Difference]: With dead ends: 82 [2021-12-14 13:54:06,422 INFO L226 Difference]: Without dead ends: 72 [2021-12-14 13:54:06,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 13:54:06,423 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:06,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:54:06,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-14 13:54:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-14 13:54:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-12-14 13:54:06,429 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 39 [2021-12-14 13:54:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:06,429 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-12-14 13:54:06,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-12-14 13:54:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 13:54:06,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:06,431 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:06,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:06,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:06,632 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1608701423, now seen corresponding path program 2 times [2021-12-14 13:54:06,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:06,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600021776] [2021-12-14 13:54:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:06,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:07,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:07,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600021776] [2021-12-14 13:54:07,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600021776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:07,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946797417] [2021-12-14 13:54:07,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:54:07,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:07,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:07,047 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) [2021-12-14 13:54:07,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 13:54:07,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:54:07,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 13:54:07,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:07,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:08,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946797417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:08,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:08,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2021-12-14 13:54:08,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213296943] [2021-12-14 13:54:08,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:08,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-14 13:54:08,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-14 13:54:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-14 13:54:08,254 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:08,421 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2021-12-14 13:54:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-14 13:54:08,422 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-14 13:54:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:08,423 INFO L225 Difference]: With dead ends: 146 [2021-12-14 13:54:08,423 INFO L226 Difference]: Without dead ends: 136 [2021-12-14 13:54:08,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-14 13:54:08,424 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:08,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:54:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-14 13:54:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-12-14 13:54:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2021-12-14 13:54:08,433 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 71 [2021-12-14 13:54:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:08,433 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2021-12-14 13:54:08,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2021-12-14 13:54:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 13:54:08,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:08,435 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:08,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:08,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:08,651 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1000525425, now seen corresponding path program 3 times [2021-12-14 13:54:08,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:08,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119684474] [2021-12-14 13:54:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:08,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:09,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:09,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119684474] [2021-12-14 13:54:09,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119684474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:09,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219529487] [2021-12-14 13:54:09,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:54:09,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:09,958 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) [2021-12-14 13:54:09,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 13:54:09,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 13:54:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:09,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 13:54:09,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2021-12-14 13:54:10,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2021-12-14 13:54:10,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219529487] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:10,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:10,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 5, 5] total 71 [2021-12-14 13:54:10,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335307859] [2021-12-14 13:54:10,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:10,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-14 13:54:10,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:10,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-14 13:54:10,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=2863, Unknown=0, NotChecked=0, Total=4970 [2021-12-14 13:54:10,765 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:12,497 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2021-12-14 13:54:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-14 13:54:12,497 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-14 13:54:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:12,498 INFO L225 Difference]: With dead ends: 154 [2021-12-14 13:54:12,499 INFO L226 Difference]: Without dead ends: 144 [2021-12-14 13:54:12,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6454, Invalid=11368, Unknown=0, NotChecked=0, Total=17822 [2021-12-14 13:54:12,502 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:12,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:54:12,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-14 13:54:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2021-12-14 13:54:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-12-14 13:54:12,511 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2021-12-14 13:54:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:12,512 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-12-14 13:54:12,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-12-14 13:54:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-14 13:54:12,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:12,513 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:12,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:12,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:12,723 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:12,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1372821556, now seen corresponding path program 4 times [2021-12-14 13:54:12,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:12,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195698622] [2021-12-14 13:54:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:12,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 13:54:14,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195698622] [2021-12-14 13:54:14,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195698622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091422784] [2021-12-14 13:54:14,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:54:14,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:14,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:14,016 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) [2021-12-14 13:54:14,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 13:54:14,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:54:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:14,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-14 13:54:14,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 13:54:14,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 13:54:17,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091422784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:17,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:17,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2021-12-14 13:54:17,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469457062] [2021-12-14 13:54:17,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:17,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-14 13:54:17,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-14 13:54:17,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2021-12-14 13:54:17,992 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:18,447 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2021-12-14 13:54:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-12-14 13:54:18,448 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-14 13:54:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:18,449 INFO L225 Difference]: With dead ends: 286 [2021-12-14 13:54:18,449 INFO L226 Difference]: Without dead ends: 272 [2021-12-14 13:54:18,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2021-12-14 13:54:18,452 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:18,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 13:54:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-14 13:54:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-12-14 13:54:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 274 transitions. [2021-12-14 13:54:18,463 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 274 transitions. Word has length 141 [2021-12-14 13:54:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:18,463 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 274 transitions. [2021-12-14 13:54:18,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 274 transitions. [2021-12-14 13:54:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-14 13:54:18,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:18,466 INFO L514 BasicCegarLoop]: trace histogram [129, 128, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:18,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:18,683 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,SelfDestructingSolverStorable9 [2021-12-14 13:54:18,684 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2118041225, now seen corresponding path program 5 times [2021-12-14 13:54:18,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:18,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125710602] [2021-12-14 13:54:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:18,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 13:54:23,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:23,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125710602] [2021-12-14 13:54:23,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125710602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:23,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64936624] [2021-12-14 13:54:23,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:54:23,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:23,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:23,536 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) [2021-12-14 13:54:23,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 13:54:23,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2021-12-14 13:54:23,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:23,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-14 13:54:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 13:54:24,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 13:54:38,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64936624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:38,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:38,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2021-12-14 13:54:38,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512555080] [2021-12-14 13:54:38,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:38,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2021-12-14 13:54:38,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2021-12-14 13:54:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2021-12-14 13:54:38,247 INFO L87 Difference]: Start difference. First operand 272 states and 274 transitions. Second operand has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:39,215 INFO L93 Difference]: Finished difference Result 546 states and 680 transitions. [2021-12-14 13:54:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2021-12-14 13:54:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-12-14 13:54:39,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:39,218 INFO L225 Difference]: With dead ends: 546 [2021-12-14 13:54:39,218 INFO L226 Difference]: Without dead ends: 532 [2021-12-14 13:54:39,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2021-12-14 13:54:39,222 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:39,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 13:54:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-14 13:54:39,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2021-12-14 13:54:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.0056497175141244) internal successors, (534), 531 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 534 transitions. [2021-12-14 13:54:39,238 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 534 transitions. Word has length 271 [2021-12-14 13:54:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:39,238 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 534 transitions. [2021-12-14 13:54:39,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:54:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 534 transitions. [2021-12-14 13:54:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2021-12-14 13:54:39,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:39,244 INFO L514 BasicCegarLoop]: trace histogram [259, 258, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:39,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:39,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:39,459 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1610521155, now seen corresponding path program 6 times [2021-12-14 13:54:39,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:39,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173631379] [2021-12-14 13:54:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:39,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 259 proven. 66822 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 13:54:57,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:57,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173631379] [2021-12-14 13:54:57,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173631379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:57,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119991601] [2021-12-14 13:54:57,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:54:57,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:57,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:57,935 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:57,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 13:54:58,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-14 13:54:58,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:54:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2021-12-14 13:54:58,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2021-12-14 13:54:59,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119991601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:59,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:59,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [261, 4, 4] total 265 [2021-12-14 13:54:59,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093475950] [2021-12-14 13:54:59,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:59,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2021-12-14 13:54:59,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:59,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2021-12-14 13:54:59,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2021-12-14 13:54:59,508 INFO L87 Difference]: Start difference. First operand 532 states and 534 transitions. Second operand has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:55:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:55:00,642 INFO L93 Difference]: Finished difference Result 554 states and 565 transitions. [2021-12-14 13:55:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2021-12-14 13:55:00,642 INFO L78 Accepts]: Start accepts. Automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 531 [2021-12-14 13:55:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:55:00,645 INFO L225 Difference]: With dead ends: 554 [2021-12-14 13:55:00,645 INFO L226 Difference]: Without dead ends: 540 [2021-12-14 13:55:00,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1058 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2021-12-14 13:55:00,649 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 524 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 13:55:00,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 28 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 13:55:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-14 13:55:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-12-14 13:55:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.0111317254174397) internal successors, (545), 539 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:55:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 545 transitions. [2021-12-14 13:55:00,663 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 545 transitions. Word has length 531 [2021-12-14 13:55:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:55:00,664 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 545 transitions. [2021-12-14 13:55:00,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:55:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 545 transitions. [2021-12-14 13:55:00,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2021-12-14 13:55:00,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:55:00,670 INFO L514 BasicCegarLoop]: trace histogram [263, 259, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:55:00,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 13:55:00,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 13:55:00,886 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:55:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:55:00,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2107211535, now seen corresponding path program 7 times [2021-12-14 13:55:00,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:55:00,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547722912] [2021-12-14 13:55:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:55:00,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:55:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat