./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 8d970a6b46f522cdb24394c622109e56254d5436a464b2c277d963fe4612a422 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:46:10,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:46:10,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:46:10,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:46:10,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:46:10,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:46:10,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:46:10,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:46:10,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:46:10,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:46:10,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:46:10,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:46:10,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:46:10,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:46:10,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:46:10,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:46:10,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:46:10,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:46:10,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:46:10,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:46:10,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:46:10,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:46:10,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:46:10,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:46:10,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:46:10,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:46:10,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:46:10,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:46:10,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:46:10,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:46:10,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:46:10,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:46:10,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:46:10,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:46:10,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:46:10,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:46:10,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:46:10,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:46:10,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:46:10,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:46:10,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:46:10,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:46:10,454 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:46:10,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:46:10,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:46:10,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:46:10,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:46:10,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:46:10,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:46:10,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:46:10,458 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:46:10,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:46:10,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:46:10,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:46:10,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:46:10,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:46:10,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:46:10,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:46:10,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:46:10,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:46:10,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:46:10,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:46:10,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:46:10,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:46:10,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:46:10,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:46:10,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:46:10,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:46:10,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:46:10,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:46:10,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:46:10,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:46:10,463 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:46:10,463 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:46:10,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:46:10,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:46:10,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d970a6b46f522cdb24394c622109e56254d5436a464b2c277d963fe4612a422 [2021-12-21 13:46:10,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:46:10,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:46:10,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:46:10,692 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:46:10,693 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:46:10,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-21 13:46:10,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b7a27409/766a52951e304736bd9898eaf87b81a5/FLAGd7d3980d6 [2021-12-21 13:46:11,153 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:46:11,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-21 13:46:11,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b7a27409/766a52951e304736bd9898eaf87b81a5/FLAGd7d3980d6 [2021-12-21 13:46:11,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b7a27409/766a52951e304736bd9898eaf87b81a5 [2021-12-21 13:46:11,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:46:11,176 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:46:11,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:46:11,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:46:11,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:46:11,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab28f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11, skipping insertion in model container [2021-12-21 13:46:11,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:46:11,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:46:11,431 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6356,6369] [2021-12-21 13:46:11,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:46:11,470 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:46:11,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6356,6369] [2021-12-21 13:46:11,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:46:11,535 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:46:11,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11 WrapperNode [2021-12-21 13:46:11,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:46:11,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:46:11,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:46:11,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:46:11,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,611 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 519 [2021-12-21 13:46:11,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:46:11,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:46:11,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:46:11,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:46:11,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:46:11,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:46:11,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:46:11,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:46:11,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (1/1) ... [2021-12-21 13:46:11,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:46:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:46:11,675 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) [2021-12-21 13:46:11,684 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 [2021-12-21 13:46:11,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:46:11,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:46:11,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:46:11,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:46:11,794 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:46:11,795 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:46:12,190 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:46:12,198 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:46:12,198 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:46:12,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:46:12 BoogieIcfgContainer [2021-12-21 13:46:12,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:46:12,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:46:12,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:46:12,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:46:12,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:46:11" (1/3) ... [2021-12-21 13:46:12,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a36ac78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:46:12, skipping insertion in model container [2021-12-21 13:46:12,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:46:11" (2/3) ... [2021-12-21 13:46:12,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a36ac78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:46:12, skipping insertion in model container [2021-12-21 13:46:12,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:46:12" (3/3) ... [2021-12-21 13:46:12,218 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-21 13:46:12,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:46:12,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:46:12,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:46:12,290 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 [2021-12-21 13:46:12,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:46:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 1.6911764705882353) internal successors, (230), 137 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 13:46:12,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:12,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:12,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1025697732, now seen corresponding path program 1 times [2021-12-21 13:46:12,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:12,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520971237] [2021-12-21 13:46:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:12,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:12,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:12,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520971237] [2021-12-21 13:46:12,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520971237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:12,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:12,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:46:12,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652724818] [2021-12-21 13:46:12,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:12,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:46:12,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:46:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:46:12,720 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 1.6911764705882353) internal successors, (230), 137 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:12,820 INFO L93 Difference]: Finished difference Result 328 states and 528 transitions. [2021-12-21 13:46:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:46:12,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 13:46:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:12,834 INFO L225 Difference]: With dead ends: 328 [2021-12-21 13:46:12,834 INFO L226 Difference]: Without dead ends: 219 [2021-12-21 13:46:12,837 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 [2021-12-21 13:46:12,841 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 167 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:12,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 487 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:46:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-21 13:46:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2021-12-21 13:46:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.5046296296296295) internal successors, (325), 216 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2021-12-21 13:46:12,920 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 61 [2021-12-21 13:46:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:12,921 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2021-12-21 13:46:12,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2021-12-21 13:46:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 13:46:12,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:12,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:12,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:46:12,936 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1571099909, now seen corresponding path program 1 times [2021-12-21 13:46:12,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:12,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325483142] [2021-12-21 13:46:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:12,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:13,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:13,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325483142] [2021-12-21 13:46:13,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325483142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:13,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:13,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:46:13,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602889817] [2021-12-21 13:46:13,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:13,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:46:13,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:13,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:46:13,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:46:13,074 INFO L87 Difference]: Start difference. First operand 217 states and 325 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:13,149 INFO L93 Difference]: Finished difference Result 549 states and 853 transitions. [2021-12-21 13:46:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:46:13,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-21 13:46:13,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:13,154 INFO L225 Difference]: With dead ends: 549 [2021-12-21 13:46:13,154 INFO L226 Difference]: Without dead ends: 367 [2021-12-21 13:46:13,162 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 [2021-12-21 13:46:13,164 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 137 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:13,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 424 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:46:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-21 13:46:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-12-21 13:46:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.5384615384615385) internal successors, (560), 364 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 560 transitions. [2021-12-21 13:46:13,214 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 560 transitions. Word has length 62 [2021-12-21 13:46:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:13,216 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 560 transitions. [2021-12-21 13:46:13,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 560 transitions. [2021-12-21 13:46:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 13:46:13,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:13,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:13,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:46:13,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash 195770199, now seen corresponding path program 1 times [2021-12-21 13:46:13,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:13,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563248393] [2021-12-21 13:46:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:13,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:13,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563248393] [2021-12-21 13:46:13,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563248393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:13,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:13,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:46:13,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145090976] [2021-12-21 13:46:13,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:13,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:46:13,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:46:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:46:13,329 INFO L87 Difference]: Start difference. First operand 365 states and 560 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:13,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:13,376 INFO L93 Difference]: Finished difference Result 961 states and 1506 transitions. [2021-12-21 13:46:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:46:13,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-21 13:46:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:13,381 INFO L225 Difference]: With dead ends: 961 [2021-12-21 13:46:13,381 INFO L226 Difference]: Without dead ends: 631 [2021-12-21 13:46:13,383 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 [2021-12-21 13:46:13,389 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 132 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:13,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 409 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:46:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-12-21 13:46:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-12-21 13:46:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5541401273885351) internal successors, (976), 628 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 976 transitions. [2021-12-21 13:46:13,472 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 976 transitions. Word has length 63 [2021-12-21 13:46:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:13,473 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 976 transitions. [2021-12-21 13:46:13,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 976 transitions. [2021-12-21 13:46:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 13:46:13,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:13,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:13,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:46:13,477 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:13,477 INFO L85 PathProgramCache]: Analyzing trace with hash 92320152, now seen corresponding path program 1 times [2021-12-21 13:46:13,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:13,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618366850] [2021-12-21 13:46:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:13,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:13,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618366850] [2021-12-21 13:46:13,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618366850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:13,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:13,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:46:13,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906564279] [2021-12-21 13:46:13,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:13,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:46:13,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:46:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:46:13,593 INFO L87 Difference]: Start difference. First operand 629 states and 976 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:13,663 INFO L93 Difference]: Finished difference Result 1689 states and 2650 transitions. [2021-12-21 13:46:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:46:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 13:46:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:13,669 INFO L225 Difference]: With dead ends: 1689 [2021-12-21 13:46:13,669 INFO L226 Difference]: Without dead ends: 1095 [2021-12-21 13:46:13,672 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 [2021-12-21 13:46:13,677 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 127 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:13,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 394 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:46:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-12-21 13:46:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1093. [2021-12-21 13:46:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.5567765567765568) internal successors, (1700), 1092 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1700 transitions. [2021-12-21 13:46:13,760 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1700 transitions. Word has length 64 [2021-12-21 13:46:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:13,761 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1700 transitions. [2021-12-21 13:46:13,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1700 transitions. [2021-12-21 13:46:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 13:46:13,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:13,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:13,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:46:13,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1673406722, now seen corresponding path program 1 times [2021-12-21 13:46:13,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:13,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842570823] [2021-12-21 13:46:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:13,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:13,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:13,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842570823] [2021-12-21 13:46:13,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842570823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:13,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:13,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:46:13,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938810426] [2021-12-21 13:46:13,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:13,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:46:13,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:46:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:46:13,906 INFO L87 Difference]: Start difference. First operand 1093 states and 1700 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:14,463 INFO L93 Difference]: Finished difference Result 7441 states and 11690 transitions. [2021-12-21 13:46:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:46:14,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-21 13:46:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:14,492 INFO L225 Difference]: With dead ends: 7441 [2021-12-21 13:46:14,492 INFO L226 Difference]: Without dead ends: 6383 [2021-12-21 13:46:14,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:46:14,496 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 1477 mSDsluCounter, 2149 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:14,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 2341 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:46:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2021-12-21 13:46:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 2149. [2021-12-21 13:46:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2148 states have (on average 1.5512104283054005) internal successors, (3332), 2148 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 3332 transitions. [2021-12-21 13:46:14,748 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 3332 transitions. Word has length 65 [2021-12-21 13:46:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:14,750 INFO L470 AbstractCegarLoop]: Abstraction has 2149 states and 3332 transitions. [2021-12-21 13:46:14,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 3332 transitions. [2021-12-21 13:46:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 13:46:14,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:14,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:14,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:46:14,755 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:14,756 INFO L85 PathProgramCache]: Analyzing trace with hash -355457067, now seen corresponding path program 1 times [2021-12-21 13:46:14,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:14,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235394955] [2021-12-21 13:46:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:14,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:14,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235394955] [2021-12-21 13:46:14,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235394955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:14,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:14,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:46:14,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556267715] [2021-12-21 13:46:14,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:14,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:46:14,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:46:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:46:14,898 INFO L87 Difference]: Start difference. First operand 2149 states and 3332 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:16,043 INFO L93 Difference]: Finished difference Result 11279 states and 17449 transitions. [2021-12-21 13:46:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:46:16,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 13:46:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:16,080 INFO L225 Difference]: With dead ends: 11279 [2021-12-21 13:46:16,080 INFO L226 Difference]: Without dead ends: 9165 [2021-12-21 13:46:16,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:46:16,088 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 835 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:16,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 933 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:46:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9165 states. [2021-12-21 13:46:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9165 to 9157. [2021-12-21 13:46:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 9156 states have (on average 1.5417212756662297) internal successors, (14116), 9156 states have internal predecessors, (14116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:17,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 14116 transitions. [2021-12-21 13:46:17,186 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 14116 transitions. Word has length 66 [2021-12-21 13:46:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:17,186 INFO L470 AbstractCegarLoop]: Abstraction has 9157 states and 14116 transitions. [2021-12-21 13:46:17,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:17,187 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 14116 transitions. [2021-12-21 13:46:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 13:46:17,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:17,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:17,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:46:17,188 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:17,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1716189444, now seen corresponding path program 1 times [2021-12-21 13:46:17,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:17,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080741806] [2021-12-21 13:46:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:17,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:17,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:17,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080741806] [2021-12-21 13:46:17,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080741806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:17,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:17,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:46:17,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763320698] [2021-12-21 13:46:17,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:17,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:46:17,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:17,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:46:17,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:46:17,248 INFO L87 Difference]: Start difference. First operand 9157 states and 14116 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:19,198 INFO L93 Difference]: Finished difference Result 24681 states and 37894 transitions. [2021-12-21 13:46:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:46:19,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-21 13:46:19,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:19,266 INFO L225 Difference]: With dead ends: 24681 [2021-12-21 13:46:19,266 INFO L226 Difference]: Without dead ends: 15559 [2021-12-21 13:46:19,284 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 [2021-12-21 13:46:19,285 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 144 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:19,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 464 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:46:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15559 states. [2021-12-21 13:46:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15559 to 15557. [2021-12-21 13:46:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15557 states, 15556 states have (on average 1.5204422730779121) internal successors, (23652), 15556 states have internal predecessors, (23652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:21,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15557 states to 15557 states and 23652 transitions. [2021-12-21 13:46:21,061 INFO L78 Accepts]: Start accepts. Automaton has 15557 states and 23652 transitions. Word has length 67 [2021-12-21 13:46:21,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:21,061 INFO L470 AbstractCegarLoop]: Abstraction has 15557 states and 23652 transitions. [2021-12-21 13:46:21,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 15557 states and 23652 transitions. [2021-12-21 13:46:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 13:46:21,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:21,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:21,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:46:21,063 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1246735554, now seen corresponding path program 1 times [2021-12-21 13:46:21,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:21,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655512536] [2021-12-21 13:46:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:21,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:21,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:21,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655512536] [2021-12-21 13:46:21,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655512536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:21,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:21,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:46:21,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136195384] [2021-12-21 13:46:21,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:21,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:46:21,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:46:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:46:21,142 INFO L87 Difference]: Start difference. First operand 15557 states and 23652 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:23,788 INFO L93 Difference]: Finished difference Result 43881 states and 66790 transitions. [2021-12-21 13:46:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:46:23,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-21 13:46:23,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:23,869 INFO L225 Difference]: With dead ends: 43881 [2021-12-21 13:46:23,870 INFO L226 Difference]: Without dead ends: 28359 [2021-12-21 13:46:23,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:46:23,897 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 842 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:23,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 218 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:46:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28359 states. [2021-12-21 13:46:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28359 to 28357. [2021-12-21 13:46:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28357 states, 28356 states have (on average 1.5123430667230922) internal successors, (42884), 28356 states have internal predecessors, (42884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28357 states to 28357 states and 42884 transitions. [2021-12-21 13:46:26,742 INFO L78 Accepts]: Start accepts. Automaton has 28357 states and 42884 transitions. Word has length 68 [2021-12-21 13:46:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:26,742 INFO L470 AbstractCegarLoop]: Abstraction has 28357 states and 42884 transitions. [2021-12-21 13:46:26,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 28357 states and 42884 transitions. [2021-12-21 13:46:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 13:46:26,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:26,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:26,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:46:26,745 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:26,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1651275811, now seen corresponding path program 1 times [2021-12-21 13:46:26,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932250804] [2021-12-21 13:46:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:26,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:26,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932250804] [2021-12-21 13:46:26,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932250804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:26,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:26,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:46:26,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777803971] [2021-12-21 13:46:26,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:26,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:46:26,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:46:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:46:26,851 INFO L87 Difference]: Start difference. First operand 28357 states and 42884 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:31,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:31,906 INFO L93 Difference]: Finished difference Result 57831 states and 86885 transitions. [2021-12-21 13:46:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:46:31,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-21 13:46:31,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:32,056 INFO L225 Difference]: With dead ends: 57831 [2021-12-21 13:46:32,056 INFO L226 Difference]: Without dead ends: 57829 [2021-12-21 13:46:32,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:46:32,087 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 306 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:32,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 953 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:46:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57829 states. [2021-12-21 13:46:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57829 to 29509. [2021-12-21 13:46:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29509 states, 29508 states have (on average 1.4923410600515115) internal successors, (44036), 29508 states have internal predecessors, (44036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29509 states to 29509 states and 44036 transitions. [2021-12-21 13:46:35,344 INFO L78 Accepts]: Start accepts. Automaton has 29509 states and 44036 transitions. Word has length 68 [2021-12-21 13:46:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:35,344 INFO L470 AbstractCegarLoop]: Abstraction has 29509 states and 44036 transitions. [2021-12-21 13:46:35,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 29509 states and 44036 transitions. [2021-12-21 13:46:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 13:46:35,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:35,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:35,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:46:35,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash -339484320, now seen corresponding path program 1 times [2021-12-21 13:46:35,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545294467] [2021-12-21 13:46:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:35,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:35,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:35,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545294467] [2021-12-21 13:46:35,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545294467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:35,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:35,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:46:35,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636445339] [2021-12-21 13:46:35,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:35,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:46:35,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:46:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:46:35,399 INFO L87 Difference]: Start difference. First operand 29509 states and 44036 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:38,795 INFO L93 Difference]: Finished difference Result 66587 states and 99176 transitions. [2021-12-21 13:46:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:46:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-21 13:46:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:38,868 INFO L225 Difference]: With dead ends: 66587 [2021-12-21 13:46:38,868 INFO L226 Difference]: Without dead ends: 37113 [2021-12-21 13:46:38,907 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 [2021-12-21 13:46:38,908 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 114 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:38,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 345 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:46:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37113 states. [2021-12-21 13:46:42,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37113 to 36967. [2021-12-21 13:46:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36967 states, 36966 states have (on average 1.4808743169398908) internal successors, (54742), 36966 states have internal predecessors, (54742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36967 states to 36967 states and 54742 transitions. [2021-12-21 13:46:42,493 INFO L78 Accepts]: Start accepts. Automaton has 36967 states and 54742 transitions. Word has length 69 [2021-12-21 13:46:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:42,493 INFO L470 AbstractCegarLoop]: Abstraction has 36967 states and 54742 transitions. [2021-12-21 13:46:42,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 36967 states and 54742 transitions. [2021-12-21 13:46:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 13:46:42,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:42,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:42,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:46:42,510 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1573259719, now seen corresponding path program 1 times [2021-12-21 13:46:42,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:42,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951092928] [2021-12-21 13:46:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:42,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:42,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:42,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951092928] [2021-12-21 13:46:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951092928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:46:42,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:46:42,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:46:42,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142372786] [2021-12-21 13:46:42,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:46:42,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:46:42,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:46:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:46:42,552 INFO L87 Difference]: Start difference. First operand 36967 states and 54742 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:46:48,947 INFO L93 Difference]: Finished difference Result 99820 states and 147994 transitions. [2021-12-21 13:46:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:46:48,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-21 13:46:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:46:49,096 INFO L225 Difference]: With dead ends: 99820 [2021-12-21 13:46:49,096 INFO L226 Difference]: Without dead ends: 66410 [2021-12-21 13:46:49,145 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 [2021-12-21 13:46:49,146 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 117 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:46:49,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 481 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:46:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66410 states. [2021-12-21 13:46:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66410 to 66408. [2021-12-21 13:46:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66408 states, 66407 states have (on average 1.471290677187646) internal successors, (97704), 66407 states have internal predecessors, (97704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66408 states to 66408 states and 97704 transitions. [2021-12-21 13:46:56,025 INFO L78 Accepts]: Start accepts. Automaton has 66408 states and 97704 transitions. Word has length 96 [2021-12-21 13:46:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:46:56,026 INFO L470 AbstractCegarLoop]: Abstraction has 66408 states and 97704 transitions. [2021-12-21 13:46:56,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:46:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 66408 states and 97704 transitions. [2021-12-21 13:46:56,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 13:46:56,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:46:56,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:46:56,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:46:56,048 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:46:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:46:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1725865046, now seen corresponding path program 1 times [2021-12-21 13:46:56,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:46:56,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041123702] [2021-12-21 13:46:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:56,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:46:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:46:56,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:46:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041123702] [2021-12-21 13:46:56,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041123702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:46:56,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775541123] [2021-12-21 13:46:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:46:56,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:46:56,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:46:56,391 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) [2021-12-21 13:46:56,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:46:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:46:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 13:46:56,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:46:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:46:56,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:46:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:46:57,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775541123] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:46:57,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:46:57,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-21 13:46:57,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952944367] [2021-12-21 13:46:57,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:46:57,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 13:46:57,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:46:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 13:46:57,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:46:57,237 INFO L87 Difference]: Start difference. First operand 66408 states and 97704 transitions. Second operand has 14 states, 14 states have (on average 19.714285714285715) internal successors, (276), 14 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)