./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_14.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 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:44:24,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:44:24,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:44:24,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:44:24,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:44:24,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:44:24,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:44:24,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:44:24,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:44:24,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:44:24,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:44:24,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:44:24,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:44:24,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:44:24,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:44:24,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:44:24,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:44:24,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:44:24,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:44:24,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:44:24,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:44:24,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:44:24,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:44:24,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:44:24,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:44:24,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:44:24,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:44:24,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:44:24,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:44:24,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:44:24,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:44:24,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:44:24,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:44:24,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:44:24,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:44:24,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:44:24,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:44:24,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:44:24,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:44:24,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:44:24,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:44:24,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:44:24,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:44:24,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:44:24,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:44:24,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:44:24,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:44:24,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:44:24,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:44:24,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:44:24,411 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:44:24,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:44:24,412 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:44:24,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:44:24,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:44:24,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:44:24,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:44:24,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:44:24,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:44:24,413 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:44:24,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:44:24,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:44:24,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:44:24,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:44:24,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:44:24,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:44:24,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:44:24,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:44:24,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:44:24,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:44:24,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:44:24,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:44:24,415 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:44:24,416 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:44:24,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:44:24,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:44:24,416 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 [2021-12-22 10:44:24,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:44:24,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:44:24,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:44:24,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:44:24,598 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:44:24,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2021-12-22 10:44:24,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdd0cb49/cfb561320d6146419fc65af213855965/FLAG99e12736a [2021-12-22 10:44:25,007 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:44:25,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2021-12-22 10:44:25,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdd0cb49/cfb561320d6146419fc65af213855965/FLAG99e12736a [2021-12-22 10:44:25,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdd0cb49/cfb561320d6146419fc65af213855965 [2021-12-22 10:44:25,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:44:25,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:44:25,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:44:25,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:44:25,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:44:25,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28caf578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25, skipping insertion in model container [2021-12-22 10:44:25,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:44:25,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:44:25,160 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_14.c[319,332] [2021-12-22 10:44:25,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:44:25,181 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:44:25,188 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_14.c[319,332] [2021-12-22 10:44:25,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:44:25,202 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:44:25,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25 WrapperNode [2021-12-22 10:44:25,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:44:25,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:44:25,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:44:25,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:44:25,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,230 INFO L137 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2021-12-22 10:44:25,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:44:25,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:44:25,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:44:25,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:44:25,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:44:25,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:44:25,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:44:25,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:44:25,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (1/1) ... [2021-12-22 10:44:25,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:44:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:25,272 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) [2021-12-22 10:44:25,290 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 [2021-12-22 10:44:25,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:44:25,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:44:25,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:44:25,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:44:25,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 10:44:25,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 10:44:25,352 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:44:25,353 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:44:25,477 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:44:25,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:44:25,484 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 10:44:25,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:44:25 BoogieIcfgContainer [2021-12-22 10:44:25,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:44:25,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:44:25,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:44:25,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:44:25,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:44:25" (1/3) ... [2021-12-22 10:44:25,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa05700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:44:25, skipping insertion in model container [2021-12-22 10:44:25,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:44:25" (2/3) ... [2021-12-22 10:44:25,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa05700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:44:25, skipping insertion in model container [2021-12-22 10:44:25,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:44:25" (3/3) ... [2021-12-22 10:44:25,492 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2021-12-22 10:44:25,496 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:44:25,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:44:25,540 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:44:25,548 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 [2021-12-22 10:44:25,548 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:44:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:44:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 10:44:25,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:25,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:25,573 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash 537015905, now seen corresponding path program 1 times [2021-12-22 10:44:25,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:25,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096241819] [2021-12-22 10:44:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:25,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:44:25,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096241819] [2021-12-22 10:44:25,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096241819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:44:25,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:44:25,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:44:25,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443420696] [2021-12-22 10:44:25,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:44:25,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:44:25,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:44:25,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:44:25,746 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:25,771 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-12-22 10:44:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:44:25,782 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 10:44:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:25,786 INFO L225 Difference]: With dead ends: 30 [2021-12-22 10:44:25,787 INFO L226 Difference]: Without dead ends: 13 [2021-12-22 10:44:25,789 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 [2021-12-22 10:44:25,794 INFO L933 BasicCegarLoop]: 20 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, 20 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 [2021-12-22 10:44:25,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:44:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-22 10:44:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-22 10:44:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:44:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-12-22 10:44:25,828 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-12-22 10:44:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:25,829 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-12-22 10:44:25,829 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-12-22 10:44:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 10:44:25,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:25,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:25,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:44:25,830 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:25,831 INFO L85 PathProgramCache]: Analyzing trace with hash 250724395, now seen corresponding path program 1 times [2021-12-22 10:44:25,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:25,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335533312] [2021-12-22 10:44:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:25,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:44:25,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335533312] [2021-12-22 10:44:25,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335533312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:44:25,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:44:25,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 10:44:25,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315794029] [2021-12-22 10:44:25,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:44:25,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 10:44:25,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:25,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 10:44:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:44:25,861 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:25,883 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2021-12-22 10:44:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 10:44:25,883 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 10:44:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:25,884 INFO L225 Difference]: With dead ends: 26 [2021-12-22 10:44:25,884 INFO L226 Difference]: Without dead ends: 15 [2021-12-22 10:44:25,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:44:25,889 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:25,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:44:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-22 10:44:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-22 10:44:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:44:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-12-22 10:44:25,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-12-22 10:44:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:25,900 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-12-22 10:44:25,900 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-12-22 10:44:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 10:44:25,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:25,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:25,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:44:25,905 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash 697472654, now seen corresponding path program 1 times [2021-12-22 10:44:25,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:25,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736052748] [2021-12-22 10:44:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:25,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:44:25,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:25,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736052748] [2021-12-22 10:44:25,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736052748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:44:25,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:44:25,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 10:44:25,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766484860] [2021-12-22 10:44:25,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:44:25,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 10:44:25,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 10:44:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:44:25,943 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:25,955 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-12-22 10:44:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 10:44:25,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 10:44:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:25,972 INFO L225 Difference]: With dead ends: 24 [2021-12-22 10:44:25,972 INFO L226 Difference]: Without dead ends: 16 [2021-12-22 10:44:25,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:44:25,973 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:25,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:44:25,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-22 10:44:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-22 10:44:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:44:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-22 10:44:25,977 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2021-12-22 10:44:25,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:25,978 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-22 10:44:25,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-22 10:44:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 10:44:25,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:25,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:25,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:44:25,979 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash 183157912, now seen corresponding path program 1 times [2021-12-22 10:44:25,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:25,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511905359] [2021-12-22 10:44:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:25,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:44:26,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:26,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511905359] [2021-12-22 10:44:26,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511905359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:44:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890980397] [2021-12-22 10:44:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:26,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:26,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:44:26,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:44:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 10:44:26,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:44:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:44:26,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:44:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:44:26,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890980397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:44:26,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:44:26,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-22 10:44:26,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066916115] [2021-12-22 10:44:26,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:44:26,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 10:44:26,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 10:44:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:44:26,277 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:26,302 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-12-22 10:44:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:44:26,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-22 10:44:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:26,304 INFO L225 Difference]: With dead ends: 33 [2021-12-22 10:44:26,304 INFO L226 Difference]: Without dead ends: 21 [2021-12-22 10:44:26,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:44:26,305 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:26,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:44:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-22 10:44:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-22 10:44:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:44:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-22 10:44:26,309 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-12-22 10:44:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:26,309 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-22 10:44:26,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-22 10:44:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 10:44:26,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:26,310 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:26,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:44:26,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:26,530 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash -26222837, now seen corresponding path program 1 times [2021-12-22 10:44:26,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:26,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716571360] [2021-12-22 10:44:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:26,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:44:26,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:26,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716571360] [2021-12-22 10:44:26,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716571360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:44:26,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137682350] [2021-12-22 10:44:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:26,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:26,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:26,589 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) [2021-12-22 10:44:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:26,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 10:44:26,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 10:44:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:44:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:44:26,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:44:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:44:26,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137682350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:44:26,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:44:26,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-22 10:44:26,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933221754] [2021-12-22 10:44:26,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:44:26,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 10:44:26,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 10:44:26,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:44:26,768 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:26,811 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-12-22 10:44:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 10:44:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 10:44:26,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:26,812 INFO L225 Difference]: With dead ends: 44 [2021-12-22 10:44:26,812 INFO L226 Difference]: Without dead ends: 29 [2021-12-22 10:44:26,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:44:26,813 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:26,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:44:26,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-22 10:44:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-22 10:44:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:44:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-22 10:44:26,821 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-12-22 10:44:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:26,822 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-22 10:44:26,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-22 10:44:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 10:44:26,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:26,823 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:26,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:44:27,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:27,037 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:27,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:27,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1794637953, now seen corresponding path program 2 times [2021-12-22 10:44:27,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:27,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219669607] [2021-12-22 10:44:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:27,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:44:27,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:27,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219669607] [2021-12-22 10:44:27,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219669607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:44:27,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035157886] [2021-12-22 10:44:27,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:44:27,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:27,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:27,111 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) [2021-12-22 10:44:27,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 10:44:27,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:44:27,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:44:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 10:44:27,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:44:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:44:27,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:44:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:44:27,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035157886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:44:27,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:44:27,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-22 10:44:27,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220150009] [2021-12-22 10:44:27,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:44:27,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 10:44:27,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 10:44:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-22 10:44:27,332 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:27,385 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2021-12-22 10:44:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 10:44:27,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-22 10:44:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:27,387 INFO L225 Difference]: With dead ends: 60 [2021-12-22 10:44:27,387 INFO L226 Difference]: Without dead ends: 45 [2021-12-22 10:44:27,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-22 10:44:27,388 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:27,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:44:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-22 10:44:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-22 10:44:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:44:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-12-22 10:44:27,393 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 25 [2021-12-22 10:44:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:27,393 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-12-22 10:44:27,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-12-22 10:44:27,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 10:44:27,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:27,394 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:27,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 10:44:27,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:27,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:27,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2939801, now seen corresponding path program 3 times [2021-12-22 10:44:27,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:27,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100458983] [2021-12-22 10:44:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:27,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:44:27,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100458983] [2021-12-22 10:44:27,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100458983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:44:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151626007] [2021-12-22 10:44:27,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:44:27,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:27,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:27,785 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) [2021-12-22 10:44:27,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 10:44:27,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-22 10:44:27,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:44:27,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 10:44:27,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:44:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-22 10:44:27,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:44:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-22 10:44:28,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151626007] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:44:28,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:44:28,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2021-12-22 10:44:28,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739140812] [2021-12-22 10:44:28,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:44:28,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 10:44:28,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 10:44:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-12-22 10:44:28,010 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:28,188 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-12-22 10:44:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 10:44:28,189 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-22 10:44:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:28,190 INFO L225 Difference]: With dead ends: 71 [2021-12-22 10:44:28,190 INFO L226 Difference]: Without dead ends: 56 [2021-12-22 10:44:28,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 10:44:28,191 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:28,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:44:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-22 10:44:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-12-22 10:44:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.108695652173913) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:44:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-12-22 10:44:28,196 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2021-12-22 10:44:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:28,196 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-12-22 10:44:28,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-12-22 10:44:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 10:44:28,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:28,197 INFO L514 BasicCegarLoop]: trace histogram [17, 15, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:28,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:44:28,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:28,407 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:28,408 INFO L85 PathProgramCache]: Analyzing trace with hash 841794498, now seen corresponding path program 4 times [2021-12-22 10:44:28,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:28,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601683490] [2021-12-22 10:44:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:28,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 10:44:28,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:28,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601683490] [2021-12-22 10:44:28,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601683490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:44:28,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058119112] [2021-12-22 10:44:28,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 10:44:28,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:28,605 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) [2021-12-22 10:44:28,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 10:44:28,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 10:44:28,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:44:28,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 10:44:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:44:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 10:44:28,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:44:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 10:44:29,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058119112] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:44:29,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:44:29,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-12-22 10:44:29,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415905665] [2021-12-22 10:44:29,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:44:29,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-22 10:44:29,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:29,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-22 10:44:29,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 10:44:29,085 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:29,159 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2021-12-22 10:44:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 10:44:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-22 10:44:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:29,164 INFO L225 Difference]: With dead ends: 102 [2021-12-22 10:44:29,164 INFO L226 Difference]: Without dead ends: 84 [2021-12-22 10:44:29,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 10:44:29,165 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:29,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:44:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-22 10:44:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-22 10:44:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0625) internal successors, (85), 81 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:44:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-12-22 10:44:29,172 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 46 [2021-12-22 10:44:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:29,172 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-12-22 10:44:29,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-12-22 10:44:29,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 10:44:29,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:29,174 INFO L514 BasicCegarLoop]: trace histogram [34, 32, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:29,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 10:44:29,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:29,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:29,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1727450091, now seen corresponding path program 5 times [2021-12-22 10:44:29,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:29,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706092252] [2021-12-22 10:44:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:29,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 10:44:29,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706092252] [2021-12-22 10:44:29,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706092252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:44:29,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334437096] [2021-12-22 10:44:29,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 10:44:29,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:29,833 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) [2021-12-22 10:44:29,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 10:44:29,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-12-22 10:44:29,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:44:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-22 10:44:29,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:44:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 10:44:30,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:44:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 10:44:31,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334437096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:44:31,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:44:31,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2021-12-22 10:44:31,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868253079] [2021-12-22 10:44:31,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:44:31,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-22 10:44:31,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:31,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-22 10:44:31,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-12-22 10:44:31,105 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:31,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:31,248 INFO L93 Difference]: Finished difference Result 170 states and 212 transitions. [2021-12-22 10:44:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-22 10:44:31,248 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-22 10:44:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:31,249 INFO L225 Difference]: With dead ends: 170 [2021-12-22 10:44:31,249 INFO L226 Difference]: Without dead ends: 152 [2021-12-22 10:44:31,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-12-22 10:44:31,251 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:31,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:44:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-22 10:44:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-12-22 10:44:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.0337837837837838) internal successors, (153), 149 states have internal predecessors, (153), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:44:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-12-22 10:44:31,261 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 80 [2021-12-22 10:44:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:31,262 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-12-22 10:44:31,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-12-22 10:44:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-22 10:44:31,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:31,264 INFO L514 BasicCegarLoop]: trace histogram [68, 66, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:31,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 10:44:31,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:31,481 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash 438683259, now seen corresponding path program 6 times [2021-12-22 10:44:31,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:31,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323079899] [2021-12-22 10:44:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:31,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 10:44:32,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:32,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323079899] [2021-12-22 10:44:32,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323079899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:44:32,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707529308] [2021-12-22 10:44:32,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 10:44:32,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:32,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:32,900 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) [2021-12-22 10:44:32,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 10:44:32,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-22 10:44:32,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:44:32,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 10:44:32,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:44:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2021-12-22 10:44:33,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:44:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4628 trivial. 0 not checked. [2021-12-22 10:44:33,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707529308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:44:33,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:44:33,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 9, 6] total 78 [2021-12-22 10:44:33,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538988810] [2021-12-22 10:44:33,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:44:33,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-22 10:44:33,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:33,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-22 10:44:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=3637, Unknown=0, NotChecked=0, Total=6006 [2021-12-22 10:44:33,754 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:35,472 INFO L93 Difference]: Finished difference Result 182 states and 195 transitions. [2021-12-22 10:44:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-22 10:44:35,472 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-12-22 10:44:35,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:35,473 INFO L225 Difference]: With dead ends: 182 [2021-12-22 10:44:35,473 INFO L226 Difference]: Without dead ends: 164 [2021-12-22 10:44:35,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7130, Invalid=14040, Unknown=0, NotChecked=0, Total=21170 [2021-12-22 10:44:35,478 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:35,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:44:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-22 10:44:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2021-12-22 10:44:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0389610389610389) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:44:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2021-12-22 10:44:35,492 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 148 [2021-12-22 10:44:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:35,493 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2021-12-22 10:44:35,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2021-12-22 10:44:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-22 10:44:35,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:35,494 INFO L514 BasicCegarLoop]: trace histogram [69, 67, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:35,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 10:44:35,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:35,711 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:35,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:35,711 INFO L85 PathProgramCache]: Analyzing trace with hash -376920888, now seen corresponding path program 7 times [2021-12-22 10:44:35,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:35,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491161704] [2021-12-22 10:44:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:35,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 10:44:37,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:37,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491161704] [2021-12-22 10:44:37,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491161704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:44:37,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373732651] [2021-12-22 10:44:37,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 10:44:37,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:37,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:37,118 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) [2021-12-22 10:44:37,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 10:44:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:37,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-22 10:44:37,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:44:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 10:44:37,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:44:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 10:44:40,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373732651] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:44:40,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:44:40,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2021-12-22 10:44:40,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321729204] [2021-12-22 10:44:40,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:44:40,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-12-22 10:44:40,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:44:40,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-12-22 10:44:40,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2021-12-22 10:44:40,948 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:44:41,238 INFO L93 Difference]: Finished difference Result 322 states and 401 transitions. [2021-12-22 10:44:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-12-22 10:44:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-22 10:44:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:44:41,241 INFO L225 Difference]: With dead ends: 322 [2021-12-22 10:44:41,241 INFO L226 Difference]: Without dead ends: 298 [2021-12-22 10:44:41,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2021-12-22 10:44:41,243 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:44:41,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:44:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-22 10:44:41,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-12-22 10:44:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.0205479452054795) internal successors, (298), 294 states have internal predecessors, (298), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:44:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 303 transitions. [2021-12-22 10:44:41,255 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 303 transitions. Word has length 151 [2021-12-22 10:44:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:44:41,255 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 303 transitions. [2021-12-22 10:44:41,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:44:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 303 transitions. [2021-12-22 10:44:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-22 10:44:41,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:44:41,258 INFO L514 BasicCegarLoop]: trace histogram [138, 136, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:44:41,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 10:44:41,471 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,SelfDestructingSolverStorable10 [2021-12-22 10:44:41,471 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:44:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:44:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2063818681, now seen corresponding path program 8 times [2021-12-22 10:44:41,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:44:41,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082917130] [2021-12-22 10:44:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:44:41,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:44:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:44:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 10:44:46,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:44:46,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082917130] [2021-12-22 10:44:46,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082917130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:44:46,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463868025] [2021-12-22 10:44:46,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:44:46,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:44:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:44:46,854 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) [2021-12-22 10:44:46,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 10:44:46,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:44:46,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:44:46,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 138 conjunts are in the unsatisfiable core [2021-12-22 10:44:46,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:44:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 10:44:47,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:45:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 10:45:00,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463868025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:45:00,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:45:00,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2021-12-22 10:45:00,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097842975] [2021-12-22 10:45:00,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:45:00,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2021-12-22 10:45:00,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:45:00,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2021-12-22 10:45:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2021-12-22 10:45:00,711 INFO L87 Difference]: Start difference. First operand 298 states and 303 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:45:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:45:01,629 INFO L93 Difference]: Finished difference Result 598 states and 746 transitions. [2021-12-22 10:45:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2021-12-22 10:45:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2021-12-22 10:45:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:45:01,632 INFO L225 Difference]: With dead ends: 598 [2021-12-22 10:45:01,632 INFO L226 Difference]: Without dead ends: 574 [2021-12-22 10:45:01,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2021-12-22 10:45:01,635 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:45:01,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 10:45:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-12-22 10:45:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-12-22 10:45:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 568 states have (on average 1.0105633802816902) internal successors, (574), 570 states have internal predecessors, (574), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:45:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 579 transitions. [2021-12-22 10:45:01,653 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 579 transitions. Word has length 289 [2021-12-22 10:45:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:45:01,654 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 579 transitions. [2021-12-22 10:45:01,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:45:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 579 transitions. [2021-12-22 10:45:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2021-12-22 10:45:01,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:45:01,660 INFO L514 BasicCegarLoop]: trace histogram [276, 274, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:45:01,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 10:45:01,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:45:01,876 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:45:01,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:45:01,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2105112101, now seen corresponding path program 9 times [2021-12-22 10:45:01,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:45:01,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228905016] [2021-12-22 10:45:01,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:45:01,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:45:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:45:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 10:45:17,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:45:17,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228905016] [2021-12-22 10:45:17,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228905016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:45:17,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741302191] [2021-12-22 10:45:17,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:45:17,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:45:17,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:45:17,830 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) [2021-12-22 10:45:17,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 10:45:17,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-22 10:45:17,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:45:17,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 10:45:17,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:45:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 826 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2021-12-22 10:45:19,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:45:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 826 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2021-12-22 10:45:20,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741302191] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:45:20,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:45:20,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 9, 9] total 291 [2021-12-22 10:45:20,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030435136] [2021-12-22 10:45:20,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:45:20,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 291 states [2021-12-22 10:45:20,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:45:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 291 interpolants. [2021-12-22 10:45:20,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38345, Invalid=46045, Unknown=0, NotChecked=0, Total=84390 [2021-12-22 10:45:20,047 INFO L87 Difference]: Start difference. First operand 574 states and 579 transitions. Second operand has 291 states, 291 states have (on average 2.013745704467354) internal successors, (586), 291 states have internal predecessors, (586), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:45:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:45:39,023 INFO L93 Difference]: Finished difference Result 614 states and 636 transitions. [2021-12-22 10:45:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-12-22 10:45:39,024 INFO L78 Accepts]: Start accepts. Automaton has has 291 states, 291 states have (on average 2.013745704467354) internal successors, (586), 291 states have internal predecessors, (586), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 565 [2021-12-22 10:45:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:45:39,027 INFO L225 Difference]: With dead ends: 614 [2021-12-22 10:45:39,027 INFO L226 Difference]: Without dead ends: 590 [2021-12-22 10:45:39,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1680 GetRequests, 1116 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41830 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=117820, Invalid=201970, Unknown=0, NotChecked=0, Total=319790 [2021-12-22 10:45:39,040 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 558 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:45:39,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 144 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 10:45:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-12-22 10:45:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 584. [2021-12-22 10:45:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 578 states have (on average 1.0103806228373702) internal successors, (584), 580 states have internal predecessors, (584), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:45:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 589 transitions. [2021-12-22 10:45:39,059 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 589 transitions. Word has length 565 [2021-12-22 10:45:39,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:45:39,060 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 589 transitions. [2021-12-22 10:45:39,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 291 states, 291 states have (on average 2.013745704467354) internal successors, (586), 291 states have internal predecessors, (586), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:45:39,061 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 589 transitions. [2021-12-22 10:45:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-12-22 10:45:39,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:45:39,067 INFO L514 BasicCegarLoop]: trace histogram [277, 275, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:45:39,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 10:45:39,301 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,SelfDestructingSolverStorable12 [2021-12-22 10:45:39,302 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:45:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:45:39,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1558426456, now seen corresponding path program 10 times [2021-12-22 10:45:39,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:45:39,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058653814] [2021-12-22 10:45:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:45:39,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:45:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat