./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.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 a3df27f87602fca8935d2269a873dfd3f1a5195383d477434680a0bc703d239a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:12:21,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:12:21,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:12:21,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:12:21,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:12:21,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:12:21,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:12:21,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:12:21,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:12:21,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:12:21,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:12:21,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:12:21,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:12:21,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:12:21,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:12:21,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:12:21,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:12:21,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:12:21,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:12:21,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:12:21,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:12:21,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:12:21,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:12:21,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:12:21,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:12:21,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:12:21,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:12:21,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:12:21,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:12:21,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:12:21,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:12:21,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:12:21,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:12:21,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:12:21,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:12:21,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:12:21,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:12:21,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:12:21,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:12:21,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:12:21,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:12:21,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:12:21,713 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:12:21,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:12:21,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:12:21,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:12:21,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:12:21,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:12:21,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:12:21,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:12:21,718 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:12:21,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:12:21,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:12:21,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:12:21,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:12:21,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:12:21,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:12:21,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:12:21,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:12:21,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:12:21,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:12:21,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:12:21,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:12:21,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:12:21,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:12:21,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:12:21,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:12:21,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:12:21,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:12:21,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:12:21,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:12:21,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:12:21,730 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:12:21,730 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:12:21,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:12:21,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3df27f87602fca8935d2269a873dfd3f1a5195383d477434680a0bc703d239a [2021-12-28 01:12:22,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:12:22,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:12:22,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:12:22,073 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:12:22,073 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:12:22,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2021-12-28 01:12:22,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80c8f388/6ca07874c9674b418895f1cebd881d11/FLAG78e159371 [2021-12-28 01:12:22,550 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:12:22,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2021-12-28 01:12:22,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80c8f388/6ca07874c9674b418895f1cebd881d11/FLAG78e159371 [2021-12-28 01:12:22,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80c8f388/6ca07874c9674b418895f1cebd881d11 [2021-12-28 01:12:22,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:12:22,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:12:22,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:12:22,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:12:22,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:12:22,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:12:22" (1/1) ... [2021-12-28 01:12:22,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4abecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:22, skipping insertion in model container [2021-12-28 01:12:22,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:12:22" (1/1) ... [2021-12-28 01:12:22,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:12:23,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:12:23,184 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/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2021-12-28 01:12:23,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:12:23,195 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:12:23,274 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/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2021-12-28 01:12:23,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:12:23,289 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:12:23,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23 WrapperNode [2021-12-28 01:12:23,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:12:23,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:12:23,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:12:23,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:12:23,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,351 INFO L137 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 523 [2021-12-28 01:12:23,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:12:23,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:12:23,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:12:23,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:12:23,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:12:23,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:12:23,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:12:23,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:12:23,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (1/1) ... [2021-12-28 01:12:23,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:12:23,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:12:23,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:12:23,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:12:23,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:12:23,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:12:23,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:12:23,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:12:23,618 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:12:23,619 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:12:24,105 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:12:24,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:12:24,112 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:12:24,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:12:24 BoogieIcfgContainer [2021-12-28 01:12:24,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:12:24,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:12:24,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:12:24,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:12:24,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:12:22" (1/3) ... [2021-12-28 01:12:24,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5569a735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:12:24, skipping insertion in model container [2021-12-28 01:12:24,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:23" (2/3) ... [2021-12-28 01:12:24,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5569a735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:12:24, skipping insertion in model container [2021-12-28 01:12:24,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:12:24" (3/3) ... [2021-12-28 01:12:24,121 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2021-12-28 01:12:24,125 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:12:24,125 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:12:24,177 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:12:24,183 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:12:24,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:12:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.7619047619047619) internal successors, (259), 148 states have internal predecessors, (259), 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) [2021-12-28 01:12:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 01:12:24,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:24,224 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] [2021-12-28 01:12:24,224 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:24,229 INFO L85 PathProgramCache]: Analyzing trace with hash 118130595, now seen corresponding path program 1 times [2021-12-28 01:12:24,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:24,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251253387] [2021-12-28 01:12:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:24,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:24,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:24,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251253387] [2021-12-28 01:12:24,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251253387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:24,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:24,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:12:24,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76278520] [2021-12-28 01:12:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:24,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:12:24,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:12:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:12:24,541 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.7619047619047619) internal successors, (259), 148 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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) [2021-12-28 01:12:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:24,585 INFO L93 Difference]: Finished difference Result 228 states and 387 transitions. [2021-12-28 01:12:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:12:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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 45 [2021-12-28 01:12:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:24,600 INFO L225 Difference]: With dead ends: 228 [2021-12-28 01:12:24,601 INFO L226 Difference]: Without dead ends: 145 [2021-12-28 01:12:24,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:12:24,614 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:24,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-28 01:12:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-28 01:12:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.75) internal successors, (252), 144 states have internal predecessors, (252), 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) [2021-12-28 01:12:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 252 transitions. [2021-12-28 01:12:24,672 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 252 transitions. Word has length 45 [2021-12-28 01:12:24,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:24,672 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 252 transitions. [2021-12-28 01:12:24,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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) [2021-12-28 01:12:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 252 transitions. [2021-12-28 01:12:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 01:12:24,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:24,679 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] [2021-12-28 01:12:24,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:12:24,680 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:24,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1253676703, now seen corresponding path program 1 times [2021-12-28 01:12:24,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:24,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611122916] [2021-12-28 01:12:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:24,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:24,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:24,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611122916] [2021-12-28 01:12:24,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611122916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:24,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:24,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:12:24,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838271581] [2021-12-28 01:12:24,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:24,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:12:24,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:24,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:12:24,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:12:24,834 INFO L87 Difference]: Start difference. First operand 145 states and 252 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-12-28 01:12:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:24,961 INFO L93 Difference]: Finished difference Result 227 states and 380 transitions. [2021-12-28 01:12:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:12:24,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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 45 [2021-12-28 01:12:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:24,966 INFO L225 Difference]: With dead ends: 227 [2021-12-28 01:12:24,966 INFO L226 Difference]: Without dead ends: 145 [2021-12-28 01:12:24,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:12:24,972 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 3 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:24,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 936 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-28 01:12:24,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-28 01:12:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3263888888888888) internal successors, (191), 144 states have internal predecessors, (191), 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) [2021-12-28 01:12:24,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2021-12-28 01:12:24,986 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 45 [2021-12-28 01:12:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:24,987 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2021-12-28 01:12:24,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-12-28 01:12:24,987 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2021-12-28 01:12:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-28 01:12:24,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:24,990 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:24,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:12:24,990 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1781682001, now seen corresponding path program 1 times [2021-12-28 01:12:24,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:24,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595023235] [2021-12-28 01:12:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:24,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:25,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595023235] [2021-12-28 01:12:25,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595023235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:25,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:25,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:25,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551801004] [2021-12-28 01:12:25,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:25,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:25,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:25,151 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:25,168 INFO L93 Difference]: Finished difference Result 295 states and 429 transitions. [2021-12-28 01:12:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 105 [2021-12-28 01:12:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:25,170 INFO L225 Difference]: With dead ends: 295 [2021-12-28 01:12:25,170 INFO L226 Difference]: Without dead ends: 217 [2021-12-28 01:12:25,171 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 [2021-12-28 01:12:25,172 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 102 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 393 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 [2021-12-28 01:12:25,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 393 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:25,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-28 01:12:25,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2021-12-28 01:12:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4158878504672898) internal successors, (303), 214 states have internal predecessors, (303), 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) [2021-12-28 01:12:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 303 transitions. [2021-12-28 01:12:25,185 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 303 transitions. Word has length 105 [2021-12-28 01:12:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:25,186 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 303 transitions. [2021-12-28 01:12:25,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,186 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 303 transitions. [2021-12-28 01:12:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-28 01:12:25,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:25,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:25,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:12:25,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1036099271, now seen corresponding path program 1 times [2021-12-28 01:12:25,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:25,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631618870] [2021-12-28 01:12:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:25,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:25,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631618870] [2021-12-28 01:12:25,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631618870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:25,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:25,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:25,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181236724] [2021-12-28 01:12:25,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:25,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:25,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:25,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:25,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:25,294 INFO L87 Difference]: Start difference. First operand 215 states and 303 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:25,322 INFO L93 Difference]: Finished difference Result 499 states and 755 transitions. [2021-12-28 01:12:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:25,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 105 [2021-12-28 01:12:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:25,327 INFO L225 Difference]: With dead ends: 499 [2021-12-28 01:12:25,327 INFO L226 Difference]: Without dead ends: 351 [2021-12-28 01:12:25,330 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 [2021-12-28 01:12:25,339 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 98 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 392 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 [2021-12-28 01:12:25,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 392 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-28 01:12:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2021-12-28 01:12:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4827586206896552) internal successors, (516), 348 states have internal predecessors, (516), 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) [2021-12-28 01:12:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 516 transitions. [2021-12-28 01:12:25,361 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 516 transitions. Word has length 105 [2021-12-28 01:12:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:25,363 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 516 transitions. [2021-12-28 01:12:25,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 516 transitions. [2021-12-28 01:12:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-28 01:12:25,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:25,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:25,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:12:25,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash -903931587, now seen corresponding path program 1 times [2021-12-28 01:12:25,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:25,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241873402] [2021-12-28 01:12:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:25,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:25,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241873402] [2021-12-28 01:12:25,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241873402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:25,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:25,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:25,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851959123] [2021-12-28 01:12:25,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:25,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:25,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:25,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:25,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:25,481 INFO L87 Difference]: Start difference. First operand 349 states and 516 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:25,513 INFO L93 Difference]: Finished difference Result 889 states and 1374 transitions. [2021-12-28 01:12:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:25,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 105 [2021-12-28 01:12:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:25,518 INFO L225 Difference]: With dead ends: 889 [2021-12-28 01:12:25,518 INFO L226 Difference]: Without dead ends: 607 [2021-12-28 01:12:25,519 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 [2021-12-28 01:12:25,519 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 94 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 391 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 [2021-12-28 01:12:25,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 391 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-12-28 01:12:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 605. [2021-12-28 01:12:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.5231788079470199) internal successors, (920), 604 states have internal predecessors, (920), 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) [2021-12-28 01:12:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 920 transitions. [2021-12-28 01:12:25,546 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 920 transitions. Word has length 105 [2021-12-28 01:12:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:25,547 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 920 transitions. [2021-12-28 01:12:25,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 920 transitions. [2021-12-28 01:12:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-28 01:12:25,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:25,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:25,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:12:25,549 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:25,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1796751027, now seen corresponding path program 1 times [2021-12-28 01:12:25,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:25,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040154951] [2021-12-28 01:12:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:25,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:25,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040154951] [2021-12-28 01:12:25,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040154951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:25,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:25,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:25,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511170726] [2021-12-28 01:12:25,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:25,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:25,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:25,620 INFO L87 Difference]: Start difference. First operand 605 states and 920 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:25,664 INFO L93 Difference]: Finished difference Result 1633 states and 2546 transitions. [2021-12-28 01:12:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:25,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 105 [2021-12-28 01:12:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:25,669 INFO L225 Difference]: With dead ends: 1633 [2021-12-28 01:12:25,670 INFO L226 Difference]: Without dead ends: 1095 [2021-12-28 01:12:25,670 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 [2021-12-28 01:12:25,671 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 90 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 390 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 [2021-12-28 01:12:25,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 390 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-12-28 01:12:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1093. [2021-12-28 01:12:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.5421245421245422) internal successors, (1684), 1092 states have internal predecessors, (1684), 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) [2021-12-28 01:12:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1684 transitions. [2021-12-28 01:12:25,713 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1684 transitions. Word has length 105 [2021-12-28 01:12:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:25,714 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1684 transitions. [2021-12-28 01:12:25,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1684 transitions. [2021-12-28 01:12:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-28 01:12:25,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:25,715 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:25,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:12:25,716 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2134544169, now seen corresponding path program 1 times [2021-12-28 01:12:25,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:25,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928716964] [2021-12-28 01:12:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:25,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:25,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:25,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928716964] [2021-12-28 01:12:25,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928716964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:25,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:25,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:25,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848520612] [2021-12-28 01:12:25,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:25,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:25,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:25,793 INFO L87 Difference]: Start difference. First operand 1093 states and 1684 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:25,865 INFO L93 Difference]: Finished difference Result 3049 states and 4758 transitions. [2021-12-28 01:12:25,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 105 [2021-12-28 01:12:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:25,874 INFO L225 Difference]: With dead ends: 3049 [2021-12-28 01:12:25,874 INFO L226 Difference]: Without dead ends: 2023 [2021-12-28 01:12:25,875 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 [2021-12-28 01:12:25,876 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 86 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 389 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 [2021-12-28 01:12:25,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 389 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-12-28 01:12:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2021. [2021-12-28 01:12:25,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2020 states have (on average 1.5465346534653466) internal successors, (3124), 2020 states have internal predecessors, (3124), 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) [2021-12-28 01:12:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 3124 transitions. [2021-12-28 01:12:25,970 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 3124 transitions. Word has length 105 [2021-12-28 01:12:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:25,971 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 3124 transitions. [2021-12-28 01:12:25,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2021-12-28 01:12:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 3124 transitions. [2021-12-28 01:12:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-28 01:12:25,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:25,973 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:25,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:12:25,973 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash -942437729, now seen corresponding path program 1 times [2021-12-28 01:12:25,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:25,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433590170] [2021-12-28 01:12:25,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:25,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:26,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:26,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433590170] [2021-12-28 01:12:26,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433590170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:26,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:26,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 01:12:26,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109633599] [2021-12-28 01:12:26,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:26,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:12:26,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:12:26,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:12:26,108 INFO L87 Difference]: Start difference. First operand 2021 states and 3124 transitions. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 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) [2021-12-28 01:12:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:27,843 INFO L93 Difference]: Finished difference Result 33285 states and 52036 transitions. [2021-12-28 01:12:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 01:12:27,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 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 105 [2021-12-28 01:12:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:27,961 INFO L225 Difference]: With dead ends: 33285 [2021-12-28 01:12:27,961 INFO L226 Difference]: Without dead ends: 31331 [2021-12-28 01:12:27,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-12-28 01:12:27,979 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 3366 mSDsluCounter, 3113 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 3298 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:27,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3366 Valid, 3298 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:12:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31331 states. [2021-12-28 01:12:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31331 to 3973. [2021-12-28 01:12:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3973 states, 3972 states have (on average 1.539778449144008) internal successors, (6116), 3972 states have internal predecessors, (6116), 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) [2021-12-28 01:12:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 6116 transitions. [2021-12-28 01:12:28,535 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 6116 transitions. Word has length 105 [2021-12-28 01:12:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:28,535 INFO L470 AbstractCegarLoop]: Abstraction has 3973 states and 6116 transitions. [2021-12-28 01:12:28,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 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) [2021-12-28 01:12:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 6116 transitions. [2021-12-28 01:12:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:12:28,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:28,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:28,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:12:28,538 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:28,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -860244721, now seen corresponding path program 1 times [2021-12-28 01:12:28,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:28,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802005383] [2021-12-28 01:12:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:28,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:28,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802005383] [2021-12-28 01:12:28,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802005383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:28,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:28,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:28,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412424699] [2021-12-28 01:12:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:28,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:28,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:28,607 INFO L87 Difference]: Start difference. First operand 3973 states and 6116 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-28 01:12:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:29,248 INFO L93 Difference]: Finished difference Result 11433 states and 17606 transitions. [2021-12-28 01:12:29,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:29,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2021-12-28 01:12:29,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:29,263 INFO L225 Difference]: With dead ends: 11433 [2021-12-28 01:12:29,263 INFO L226 Difference]: Without dead ends: 7527 [2021-12-28 01:12:29,270 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 [2021-12-28 01:12:29,272 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 77 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:29,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 304 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2021-12-28 01:12:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 7461. [2021-12-28 01:12:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7461 states, 7460 states have (on average 1.5190348525469168) internal successors, (11332), 7460 states have internal predecessors, (11332), 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) [2021-12-28 01:12:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7461 states to 7461 states and 11332 transitions. [2021-12-28 01:12:29,770 INFO L78 Accepts]: Start accepts. Automaton has 7461 states and 11332 transitions. Word has length 107 [2021-12-28 01:12:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:29,771 INFO L470 AbstractCegarLoop]: Abstraction has 7461 states and 11332 transitions. [2021-12-28 01:12:29,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-28 01:12:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7461 states and 11332 transitions. [2021-12-28 01:12:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:12:29,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:29,772 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:29,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:12:29,773 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:29,774 INFO L85 PathProgramCache]: Analyzing trace with hash -793751209, now seen corresponding path program 1 times [2021-12-28 01:12:29,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:29,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137537171] [2021-12-28 01:12:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:29,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:30,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:30,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137537171] [2021-12-28 01:12:30,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137537171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:30,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:30,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 01:12:30,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691802928] [2021-12-28 01:12:30,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:30,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:12:30,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:30,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:12:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:12:30,045 INFO L87 Difference]: Start difference. First operand 7461 states and 11332 transitions. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 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) [2021-12-28 01:12:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:30,993 INFO L93 Difference]: Finished difference Result 14857 states and 22598 transitions. [2021-12-28 01:12:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:12:30,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 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 107 [2021-12-28 01:12:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:31,006 INFO L225 Difference]: With dead ends: 14857 [2021-12-28 01:12:31,007 INFO L226 Difference]: Without dead ends: 7463 [2021-12-28 01:12:31,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:12:31,015 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 652 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:31,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 1208 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7463 states. [2021-12-28 01:12:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7463 to 7461. [2021-12-28 01:12:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7461 states, 7460 states have (on average 1.510455764075067) internal successors, (11268), 7460 states have internal predecessors, (11268), 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) [2021-12-28 01:12:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7461 states to 7461 states and 11268 transitions. [2021-12-28 01:12:31,650 INFO L78 Accepts]: Start accepts. Automaton has 7461 states and 11268 transitions. Word has length 107 [2021-12-28 01:12:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:31,651 INFO L470 AbstractCegarLoop]: Abstraction has 7461 states and 11268 transitions. [2021-12-28 01:12:31,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 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) [2021-12-28 01:12:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 7461 states and 11268 transitions. [2021-12-28 01:12:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:12:31,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:31,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:31,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:12:31,660 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1539759597, now seen corresponding path program 1 times [2021-12-28 01:12:31,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:31,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079188604] [2021-12-28 01:12:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:31,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:31,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:31,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079188604] [2021-12-28 01:12:31,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079188604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:31,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:31,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:31,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858816882] [2021-12-28 01:12:31,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:31,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:31,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:31,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:31,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:31,718 INFO L87 Difference]: Start difference. First operand 7461 states and 11268 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-28 01:12:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:32,430 INFO L93 Difference]: Finished difference Result 21481 states and 32390 transitions. [2021-12-28 01:12:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:32,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2021-12-28 01:12:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:32,452 INFO L225 Difference]: With dead ends: 21481 [2021-12-28 01:12:32,453 INFO L226 Difference]: Without dead ends: 14087 [2021-12-28 01:12:32,462 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 [2021-12-28 01:12:32,463 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 106 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 403 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 [2021-12-28 01:12:32,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 403 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14087 states. [2021-12-28 01:12:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14087 to 14085. [2021-12-28 01:12:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14085 states, 14084 states have (on average 1.4953138312979268) internal successors, (21060), 14084 states have internal predecessors, (21060), 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) [2021-12-28 01:12:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14085 states to 14085 states and 21060 transitions. [2021-12-28 01:12:33,287 INFO L78 Accepts]: Start accepts. Automaton has 14085 states and 21060 transitions. Word has length 107 [2021-12-28 01:12:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:33,288 INFO L470 AbstractCegarLoop]: Abstraction has 14085 states and 21060 transitions. [2021-12-28 01:12:33,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-28 01:12:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 14085 states and 21060 transitions. [2021-12-28 01:12:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:12:33,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:33,289 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:33,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:12:33,289 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:33,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1642858163, now seen corresponding path program 1 times [2021-12-28 01:12:33,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:33,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355933259] [2021-12-28 01:12:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:33,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:33,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:33,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355933259] [2021-12-28 01:12:33,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355933259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:33,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:33,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:33,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412272371] [2021-12-28 01:12:33,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:33,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:33,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:33,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:33,339 INFO L87 Difference]: Start difference. First operand 14085 states and 21060 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-28 01:12:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:34,789 INFO L93 Difference]: Finished difference Result 40585 states and 60486 transitions. [2021-12-28 01:12:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2021-12-28 01:12:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:34,836 INFO L225 Difference]: With dead ends: 40585 [2021-12-28 01:12:34,836 INFO L226 Difference]: Without dead ends: 26567 [2021-12-28 01:12:34,857 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 [2021-12-28 01:12:34,858 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 110 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 412 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 [2021-12-28 01:12:34,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 412 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:34,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26567 states. [2021-12-28 01:12:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26567 to 26565. [2021-12-28 01:12:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26565 states, 26564 states have (on average 1.4770365908748682) internal successors, (39236), 26564 states have internal predecessors, (39236), 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) [2021-12-28 01:12:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26565 states to 26565 states and 39236 transitions. [2021-12-28 01:12:36,474 INFO L78 Accepts]: Start accepts. Automaton has 26565 states and 39236 transitions. Word has length 107 [2021-12-28 01:12:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:36,475 INFO L470 AbstractCegarLoop]: Abstraction has 26565 states and 39236 transitions. [2021-12-28 01:12:36,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-28 01:12:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 26565 states and 39236 transitions. [2021-12-28 01:12:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-28 01:12:36,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:36,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:36,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:12:36,477 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash 748793536, now seen corresponding path program 1 times [2021-12-28 01:12:36,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:36,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772462129] [2021-12-28 01:12:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:36,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:36,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:36,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772462129] [2021-12-28 01:12:36,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772462129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:36,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:36,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:12:36,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572873901] [2021-12-28 01:12:36,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:36,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:12:36,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:36,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:12:36,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:12:36,584 INFO L87 Difference]: Start difference. First operand 26565 states and 39236 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 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) [2021-12-28 01:12:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:39,674 INFO L93 Difference]: Finished difference Result 46191 states and 67897 transitions. [2021-12-28 01:12:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:12:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 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 108 [2021-12-28 01:12:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:39,747 INFO L225 Difference]: With dead ends: 46191 [2021-12-28 01:12:39,747 INFO L226 Difference]: Without dead ends: 46189 [2021-12-28 01:12:39,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:12:39,763 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 903 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:39,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 1001 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46189 states. [2021-12-28 01:12:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46189 to 27333. [2021-12-28 01:12:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27333 states, 27332 states have (on average 1.4589492170349774) internal successors, (39876), 27332 states have internal predecessors, (39876), 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) [2021-12-28 01:12:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27333 states to 27333 states and 39876 transitions. [2021-12-28 01:12:41,760 INFO L78 Accepts]: Start accepts. Automaton has 27333 states and 39876 transitions. Word has length 108 [2021-12-28 01:12:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:41,761 INFO L470 AbstractCegarLoop]: Abstraction has 27333 states and 39876 transitions. [2021-12-28 01:12:41,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 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) [2021-12-28 01:12:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 27333 states and 39876 transitions. [2021-12-28 01:12:41,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-28 01:12:41,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:41,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:41,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:12:41,762 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:41,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1878838190, now seen corresponding path program 1 times [2021-12-28 01:12:41,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:41,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112437808] [2021-12-28 01:12:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:41,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:41,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:41,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112437808] [2021-12-28 01:12:41,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112437808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:41,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:41,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:41,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652734619] [2021-12-28 01:12:41,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:41,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:41,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:41,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:41,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:41,814 INFO L87 Difference]: Start difference. First operand 27333 states and 39876 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-12-28 01:12:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:44,350 INFO L93 Difference]: Finished difference Result 54988 states and 80586 transitions. [2021-12-28 01:12:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:44,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2021-12-28 01:12:44,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:44,400 INFO L225 Difference]: With dead ends: 54988 [2021-12-28 01:12:44,400 INFO L226 Difference]: Without dead ends: 40137 [2021-12-28 01:12:44,424 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 [2021-12-28 01:12:44,425 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 111 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 416 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 [2021-12-28 01:12:44,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 416 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40137 states. [2021-12-28 01:12:47,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40137 to 40135. [2021-12-28 01:12:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40135 states, 40134 states have (on average 1.4528828424776996) internal successors, (58310), 40134 states have internal predecessors, (58310), 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) [2021-12-28 01:12:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40135 states to 40135 states and 58310 transitions. [2021-12-28 01:12:47,615 INFO L78 Accepts]: Start accepts. Automaton has 40135 states and 58310 transitions. Word has length 109 [2021-12-28 01:12:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:47,616 INFO L470 AbstractCegarLoop]: Abstraction has 40135 states and 58310 transitions. [2021-12-28 01:12:47,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-12-28 01:12:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 40135 states and 58310 transitions. [2021-12-28 01:12:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-28 01:12:47,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:47,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:47,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:12:47,636 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2146990555, now seen corresponding path program 1 times [2021-12-28 01:12:47,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:47,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019951173] [2021-12-28 01:12:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:47,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-28 01:12:47,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019951173] [2021-12-28 01:12:47,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019951173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:47,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:47,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 01:12:47,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017252761] [2021-12-28 01:12:47,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:47,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:12:47,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:47,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:12:47,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:12:47,775 INFO L87 Difference]: Start difference. First operand 40135 states and 58310 transitions. Second operand has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 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)