./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label23.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/eca-rers2012/Problem03_label23.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 f8d52330c815f141bcb84aeefc15b1687a66c0b13bb7dfec635891f85eb645e1 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:04:20,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:04:20,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:04:20,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:04:20,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:04:20,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:04:20,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:04:20,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:04:20,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:04:20,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:04:20,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:04:20,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:04:20,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:04:20,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:04:20,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:04:20,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:04:20,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:04:20,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:04:20,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:04:20,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:04:20,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:04:20,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:04:20,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:04:20,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:04:20,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:04:20,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:04:20,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:04:20,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:04:20,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:04:20,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:04:20,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:04:20,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:04:20,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:04:20,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:04:20,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:04:20,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:04:20,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:04:20,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:04:20,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:04:20,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:04:20,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:04:20,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:04:20,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:04:20,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:04:20,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:04:20,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:04:20,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:04:20,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:04:20,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:04:20,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:04:20,584 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:04:20,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:04:20,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:04:20,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:04:20,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:04:20,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:04:20,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:04:20,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:04:20,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:04:20,586 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:04:20,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:04:20,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:04:20,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:04:20,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:04:20,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:04:20,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:04:20,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:04:20,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:04:20,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:04:20,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:04:20,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:04:20,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:04:20,588 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:04:20,588 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:04:20,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:04:20,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:04:20,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d52330c815f141bcb84aeefc15b1687a66c0b13bb7dfec635891f85eb645e1 [2021-12-15 09:04:20,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:04:20,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:04:20,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:04:20,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:04:20,819 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:04:20,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label23.c [2021-12-15 09:04:20,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3adbea80a/a016ac9448eb4469bfb234e8586ec106/FLAGed6fa5412 [2021-12-15 09:04:21,315 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:04:21,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label23.c [2021-12-15 09:04:21,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3adbea80a/a016ac9448eb4469bfb234e8586ec106/FLAGed6fa5412 [2021-12-15 09:04:21,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3adbea80a/a016ac9448eb4469bfb234e8586ec106 [2021-12-15 09:04:21,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:04:21,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:04:21,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:04:21,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:04:21,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:04:21,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:21,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ceb09bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21, skipping insertion in model container [2021-12-15 09:04:21,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:21,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:04:21,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:04:21,775 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/eca-rers2012/Problem03_label23.c[57306,57319] [2021-12-15 09:04:21,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:04:21,809 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:04:21,928 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/eca-rers2012/Problem03_label23.c[57306,57319] [2021-12-15 09:04:21,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:04:21,949 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:04:21,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21 WrapperNode [2021-12-15 09:04:21,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:04:21,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:04:21,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:04:21,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:04:21,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,096 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:04:22,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:04:22,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:04:22,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:04:22,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:04:22,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:04:22,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:04:22,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:04:22,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:04:22,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (1/1) ... [2021-12-15 09:04:22,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:04:22,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:22,211 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) [2021-12-15 09:04:22,226 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 [2021-12-15 09:04:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:04:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:04:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:04:22,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:04:22,296 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:04:22,299 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:04:23,373 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:04:23,382 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:04:23,382 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:04:23,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:04:23 BoogieIcfgContainer [2021-12-15 09:04:23,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:04:23,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:04:23,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:04:23,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:04:23,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:04:21" (1/3) ... [2021-12-15 09:04:23,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa96e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:04:23, skipping insertion in model container [2021-12-15 09:04:23,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:21" (2/3) ... [2021-12-15 09:04:23,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa96e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:04:23, skipping insertion in model container [2021-12-15 09:04:23,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:04:23" (3/3) ... [2021-12-15 09:04:23,393 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label23.c [2021-12-15 09:04:23,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:04:23,397 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:04:23,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:04:23,446 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 [2021-12-15 09:04:23,447 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:04:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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) [2021-12-15 09:04:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-15 09:04:23,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:23,491 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:23,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash 552287235, now seen corresponding path program 1 times [2021-12-15 09:04:23,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:23,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675783645] [2021-12-15 09:04:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:23,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:23,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:23,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675783645] [2021-12-15 09:04:23,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675783645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:23,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:23,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:23,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138208552] [2021-12-15 09:04:23,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:23,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:23,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:23,930 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-12-15 09:04:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:24,753 INFO L93 Difference]: Finished difference Result 810 states and 1445 transitions. [2021-12-15 09:04:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 171 [2021-12-15 09:04:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:24,769 INFO L225 Difference]: With dead ends: 810 [2021-12-15 09:04:24,770 INFO L226 Difference]: Without dead ends: 444 [2021-12-15 09:04:24,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:24,780 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 83 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:24,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 231 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:04:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-15 09:04:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-12-15 09:04:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.4288939051918736) internal successors, (633), 443 states have internal predecessors, (633), 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) [2021-12-15 09:04:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 633 transitions. [2021-12-15 09:04:24,839 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 633 transitions. Word has length 171 [2021-12-15 09:04:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:24,841 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 633 transitions. [2021-12-15 09:04:24,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-12-15 09:04:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 633 transitions. [2021-12-15 09:04:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-15 09:04:24,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:24,849 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:24,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:04:24,849 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:24,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:24,850 INFO L85 PathProgramCache]: Analyzing trace with hash 48412932, now seen corresponding path program 1 times [2021-12-15 09:04:24,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:24,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607845792] [2021-12-15 09:04:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:24,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:24,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:24,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607845792] [2021-12-15 09:04:24,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607845792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:24,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:24,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:24,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047499957] [2021-12-15 09:04:24,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:24,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:24,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:24,936 INFO L87 Difference]: Start difference. First operand 444 states and 633 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2021-12-15 09:04:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:25,590 INFO L93 Difference]: Finished difference Result 1312 states and 1878 transitions. [2021-12-15 09:04:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:25,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 179 [2021-12-15 09:04:25,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:25,597 INFO L225 Difference]: With dead ends: 1312 [2021-12-15 09:04:25,597 INFO L226 Difference]: Without dead ends: 870 [2021-12-15 09:04:25,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:25,601 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:25,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-12-15 09:04:25,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2021-12-15 09:04:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3953216374269006) internal successors, (1193), 855 states have internal predecessors, (1193), 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) [2021-12-15 09:04:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1193 transitions. [2021-12-15 09:04:25,625 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1193 transitions. Word has length 179 [2021-12-15 09:04:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:25,626 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1193 transitions. [2021-12-15 09:04:25,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2021-12-15 09:04:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1193 transitions. [2021-12-15 09:04:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-15 09:04:25,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:25,629 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:25,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:04:25,630 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:25,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1529135225, now seen corresponding path program 1 times [2021-12-15 09:04:25,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:25,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060899544] [2021-12-15 09:04:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:25,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:25,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:25,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060899544] [2021-12-15 09:04:25,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060899544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:25,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:25,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:25,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524906345] [2021-12-15 09:04:25,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:25,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:25,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:25,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:25,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:25,754 INFO L87 Difference]: Start difference. First operand 856 states and 1193 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2021-12-15 09:04:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:26,321 INFO L93 Difference]: Finished difference Result 2535 states and 3534 transitions. [2021-12-15 09:04:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:26,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 186 [2021-12-15 09:04:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:26,327 INFO L225 Difference]: With dead ends: 2535 [2021-12-15 09:04:26,328 INFO L226 Difference]: Without dead ends: 1681 [2021-12-15 09:04:26,329 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 [2021-12-15 09:04:26,330 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 114 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:26,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 365 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:26,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2021-12-15 09:04:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1680. [2021-12-15 09:04:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 1.3097081596188207) internal successors, (2199), 1679 states have internal predecessors, (2199), 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) [2021-12-15 09:04:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2199 transitions. [2021-12-15 09:04:26,361 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2199 transitions. Word has length 186 [2021-12-15 09:04:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:26,361 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2199 transitions. [2021-12-15 09:04:26,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2021-12-15 09:04:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2199 transitions. [2021-12-15 09:04:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-15 09:04:26,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:26,365 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:26,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:04:26,365 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:26,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1891170029, now seen corresponding path program 1 times [2021-12-15 09:04:26,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:26,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743769859] [2021-12-15 09:04:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:26,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:26,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:26,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743769859] [2021-12-15 09:04:26,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743769859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:26,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:26,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:26,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001787858] [2021-12-15 09:04:26,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:26,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:26,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:26,450 INFO L87 Difference]: Start difference. First operand 1680 states and 2199 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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) [2021-12-15 09:04:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:27,089 INFO L93 Difference]: Finished difference Result 4182 states and 5462 transitions. [2021-12-15 09:04:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 192 [2021-12-15 09:04:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:27,098 INFO L225 Difference]: With dead ends: 4182 [2021-12-15 09:04:27,098 INFO L226 Difference]: Without dead ends: 2504 [2021-12-15 09:04:27,100 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 [2021-12-15 09:04:27,101 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 224 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:27,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 369 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-12-15 09:04:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2499. [2021-12-15 09:04:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 1.2618094475580464) internal successors, (3152), 2498 states have internal predecessors, (3152), 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) [2021-12-15 09:04:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 3152 transitions. [2021-12-15 09:04:27,136 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 3152 transitions. Word has length 192 [2021-12-15 09:04:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:27,136 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 3152 transitions. [2021-12-15 09:04:27,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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) [2021-12-15 09:04:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 3152 transitions. [2021-12-15 09:04:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-15 09:04:27,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:27,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:27,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:04:27,140 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:27,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash -275852577, now seen corresponding path program 1 times [2021-12-15 09:04:27,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:27,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110243255] [2021-12-15 09:04:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:27,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:27,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:27,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110243255] [2021-12-15 09:04:27,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110243255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:27,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:27,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:27,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492959528] [2021-12-15 09:04:27,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:27,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:27,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:27,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:27,197 INFO L87 Difference]: Start difference. First operand 2499 states and 3152 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 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) [2021-12-15 09:04:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:27,812 INFO L93 Difference]: Finished difference Result 4969 states and 6268 transitions. [2021-12-15 09:04:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:27,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 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) Word has length 196 [2021-12-15 09:04:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:27,818 INFO L225 Difference]: With dead ends: 4969 [2021-12-15 09:04:27,819 INFO L226 Difference]: Without dead ends: 2472 [2021-12-15 09:04:27,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:27,828 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 472 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:27,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 44 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-12-15 09:04:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2468. [2021-12-15 09:04:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 1.2160518848804216) internal successors, (3000), 2467 states have internal predecessors, (3000), 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) [2021-12-15 09:04:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3000 transitions. [2021-12-15 09:04:27,870 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3000 transitions. Word has length 196 [2021-12-15 09:04:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:27,871 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3000 transitions. [2021-12-15 09:04:27,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 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) [2021-12-15 09:04:27,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3000 transitions. [2021-12-15 09:04:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-15 09:04:27,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:27,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:27,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:04:27,878 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:27,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash 694043869, now seen corresponding path program 1 times [2021-12-15 09:04:27,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:27,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198779972] [2021-12-15 09:04:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:27,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:27,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198779972] [2021-12-15 09:04:27,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198779972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:27,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:27,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:27,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536609253] [2021-12-15 09:04:27,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:27,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:27,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:27,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:27,943 INFO L87 Difference]: Start difference. First operand 2468 states and 3000 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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) [2021-12-15 09:04:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:28,497 INFO L93 Difference]: Finished difference Result 7381 states and 8973 transitions. [2021-12-15 09:04:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 199 [2021-12-15 09:04:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:28,511 INFO L225 Difference]: With dead ends: 7381 [2021-12-15 09:04:28,511 INFO L226 Difference]: Without dead ends: 4915 [2021-12-15 09:04:28,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:28,515 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:28,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 114 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2021-12-15 09:04:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4909. [2021-12-15 09:04:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4908 states have (on average 1.176242868785656) internal successors, (5773), 4908 states have internal predecessors, (5773), 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) [2021-12-15 09:04:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 5773 transitions. [2021-12-15 09:04:28,601 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 5773 transitions. Word has length 199 [2021-12-15 09:04:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:28,601 INFO L470 AbstractCegarLoop]: Abstraction has 4909 states and 5773 transitions. [2021-12-15 09:04:28,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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) [2021-12-15 09:04:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 5773 transitions. [2021-12-15 09:04:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-15 09:04:28,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:28,608 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:28,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:04:28,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:28,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1665057800, now seen corresponding path program 1 times [2021-12-15 09:04:28,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:28,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029689498] [2021-12-15 09:04:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:28,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:28,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:28,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029689498] [2021-12-15 09:04:28,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029689498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:28,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:28,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:28,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638030170] [2021-12-15 09:04:28,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:28,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:28,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:28,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:28,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:28,681 INFO L87 Difference]: Start difference. First operand 4909 states and 5773 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-12-15 09:04:29,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:29,526 INFO L93 Difference]: Finished difference Result 10432 states and 12347 transitions. [2021-12-15 09:04:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:29,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 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 208 [2021-12-15 09:04:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:29,540 INFO L225 Difference]: With dead ends: 10432 [2021-12-15 09:04:29,540 INFO L226 Difference]: Without dead ends: 5525 [2021-12-15 09:04:29,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:29,546 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 418 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:29,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 96 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:04:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-12-15 09:04:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 4909. [2021-12-15 09:04:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4908 states have (on average 1.176242868785656) internal successors, (5773), 4908 states have internal predecessors, (5773), 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) [2021-12-15 09:04:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 5773 transitions. [2021-12-15 09:04:29,637 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 5773 transitions. Word has length 208 [2021-12-15 09:04:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:29,637 INFO L470 AbstractCegarLoop]: Abstraction has 4909 states and 5773 transitions. [2021-12-15 09:04:29,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-12-15 09:04:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 5773 transitions. [2021-12-15 09:04:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-15 09:04:29,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:29,646 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:29,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:04:29,646 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1373146291, now seen corresponding path program 1 times [2021-12-15 09:04:29,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:29,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599009406] [2021-12-15 09:04:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:29,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:04:29,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599009406] [2021-12-15 09:04:29,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599009406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921845903] [2021-12-15 09:04:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:29,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:29,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:29,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:29,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:04:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:29,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:30,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:30,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921845903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:30,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:30,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:30,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319395343] [2021-12-15 09:04:30,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:30,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:30,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:30,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:30,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:30,179 INFO L87 Difference]: Start difference. First operand 4909 states and 5773 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-15 09:04:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:30,761 INFO L93 Difference]: Finished difference Result 12257 states and 14661 transitions. [2021-12-15 09:04:30,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:30,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 215 [2021-12-15 09:04:30,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:30,778 INFO L225 Difference]: With dead ends: 12257 [2021-12-15 09:04:30,778 INFO L226 Difference]: Without dead ends: 7350 [2021-12-15 09:04:30,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:30,783 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 215 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:30,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 370 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7350 states. [2021-12-15 09:04:30,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7350 to 7345. [2021-12-15 09:04:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7345 states, 7344 states have (on average 1.142020697167756) internal successors, (8387), 7344 states have internal predecessors, (8387), 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) [2021-12-15 09:04:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7345 states to 7345 states and 8387 transitions. [2021-12-15 09:04:30,862 INFO L78 Accepts]: Start accepts. Automaton has 7345 states and 8387 transitions. Word has length 215 [2021-12-15 09:04:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:30,863 INFO L470 AbstractCegarLoop]: Abstraction has 7345 states and 8387 transitions. [2021-12-15 09:04:30,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-15 09:04:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7345 states and 8387 transitions. [2021-12-15 09:04:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-15 09:04:30,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:30,869 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:30,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:31,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:31,091 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:31,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1740772773, now seen corresponding path program 1 times [2021-12-15 09:04:31,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:31,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422813860] [2021-12-15 09:04:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:31,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 09:04:31,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422813860] [2021-12-15 09:04:31,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422813860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369291105] [2021-12-15 09:04:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:31,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:31,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:31,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:31,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:04:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:31,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:04:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 09:04:31,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:31,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369291105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:31,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:31,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:31,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686909083] [2021-12-15 09:04:31,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:31,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:31,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:31,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:04:31,600 INFO L87 Difference]: Start difference. First operand 7345 states and 8387 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-15 09:04:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:32,365 INFO L93 Difference]: Finished difference Result 23048 states and 26486 transitions. [2021-12-15 09:04:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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 219 [2021-12-15 09:04:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:32,394 INFO L225 Difference]: With dead ends: 23048 [2021-12-15 09:04:32,395 INFO L226 Difference]: Without dead ends: 15705 [2021-12-15 09:04:32,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:04:32,406 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 523 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:32,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 478 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:04:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15705 states. [2021-12-15 09:04:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15705 to 15694. [2021-12-15 09:04:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15694 states, 15693 states have (on average 1.146052380042057) internal successors, (17985), 15693 states have internal predecessors, (17985), 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) [2021-12-15 09:04:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15694 states to 15694 states and 17985 transitions. [2021-12-15 09:04:32,647 INFO L78 Accepts]: Start accepts. Automaton has 15694 states and 17985 transitions. Word has length 219 [2021-12-15 09:04:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:32,648 INFO L470 AbstractCegarLoop]: Abstraction has 15694 states and 17985 transitions. [2021-12-15 09:04:32,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-15 09:04:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 15694 states and 17985 transitions. [2021-12-15 09:04:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-15 09:04:32,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:32,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:32,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:32,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 09:04:32,864 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:32,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1801431692, now seen corresponding path program 1 times [2021-12-15 09:04:32,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:32,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677679065] [2021-12-15 09:04:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:32,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:32,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:32,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677679065] [2021-12-15 09:04:32,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677679065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:32,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:32,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:32,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116115590] [2021-12-15 09:04:32,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:32,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:32,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:32,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:32,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:32,926 INFO L87 Difference]: Start difference. First operand 15694 states and 17985 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2021-12-15 09:04:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:33,550 INFO L93 Difference]: Finished difference Result 36685 states and 41963 transitions. [2021-12-15 09:04:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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 222 [2021-12-15 09:04:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:33,582 INFO L225 Difference]: With dead ends: 36685 [2021-12-15 09:04:33,583 INFO L226 Difference]: Without dead ends: 20993 [2021-12-15 09:04:33,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:33,600 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 210 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:33,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 91 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20993 states. [2021-12-15 09:04:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20993 to 20987. [2021-12-15 09:04:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20987 states, 20986 states have (on average 1.1403793004860383) internal successors, (23932), 20986 states have internal predecessors, (23932), 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) [2021-12-15 09:04:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20987 states to 20987 states and 23932 transitions. [2021-12-15 09:04:33,880 INFO L78 Accepts]: Start accepts. Automaton has 20987 states and 23932 transitions. Word has length 222 [2021-12-15 09:04:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:33,880 INFO L470 AbstractCegarLoop]: Abstraction has 20987 states and 23932 transitions. [2021-12-15 09:04:33,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2021-12-15 09:04:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 20987 states and 23932 transitions. [2021-12-15 09:04:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-15 09:04:33,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:33,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:33,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:04:33,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:33,894 INFO L85 PathProgramCache]: Analyzing trace with hash 365918053, now seen corresponding path program 1 times [2021-12-15 09:04:33,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:33,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292414620] [2021-12-15 09:04:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:33,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:34,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:34,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292414620] [2021-12-15 09:04:34,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292414620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:34,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:34,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:34,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932968095] [2021-12-15 09:04:34,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:34,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:34,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:34,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:34,025 INFO L87 Difference]: Start difference. First operand 20987 states and 23932 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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) [2021-12-15 09:04:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:34,616 INFO L93 Difference]: Finished difference Result 45236 states and 51527 transitions. [2021-12-15 09:04:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:34,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 225 [2021-12-15 09:04:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:34,657 INFO L225 Difference]: With dead ends: 45236 [2021-12-15 09:04:34,657 INFO L226 Difference]: Without dead ends: 24860 [2021-12-15 09:04:34,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:34,678 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 180 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:34,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 146 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24860 states. [2021-12-15 09:04:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24860 to 24851. [2021-12-15 09:04:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24851 states, 24850 states have (on average 1.1348088531187124) internal successors, (28200), 24850 states have internal predecessors, (28200), 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) [2021-12-15 09:04:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24851 states to 24851 states and 28200 transitions. [2021-12-15 09:04:35,048 INFO L78 Accepts]: Start accepts. Automaton has 24851 states and 28200 transitions. Word has length 225 [2021-12-15 09:04:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:35,049 INFO L470 AbstractCegarLoop]: Abstraction has 24851 states and 28200 transitions. [2021-12-15 09:04:35,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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) [2021-12-15 09:04:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 24851 states and 28200 transitions. [2021-12-15 09:04:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-15 09:04:35,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:35,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:35,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:04:35,065 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash 56798790, now seen corresponding path program 1 times [2021-12-15 09:04:35,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:35,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848429485] [2021-12-15 09:04:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:35,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:35,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:35,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848429485] [2021-12-15 09:04:35,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848429485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:35,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156770562] [2021-12-15 09:04:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:35,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:35,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:35,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:35,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:04:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:35,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-15 09:04:35,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:35,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156770562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:35,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:35,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:04:35,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889069082] [2021-12-15 09:04:35,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:35,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:35,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:35,637 INFO L87 Difference]: Start difference. First operand 24851 states and 28200 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-12-15 09:04:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:36,379 INFO L93 Difference]: Finished difference Result 59074 states and 67503 transitions. [2021-12-15 09:04:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:36,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 233 [2021-12-15 09:04:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:36,424 INFO L225 Difference]: With dead ends: 59074 [2021-12-15 09:04:36,424 INFO L226 Difference]: Without dead ends: 35243 [2021-12-15 09:04:36,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:36,444 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 84 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:36,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 100 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35243 states. [2021-12-15 09:04:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35243 to 31568. [2021-12-15 09:04:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31568 states, 31567 states have (on average 1.1326701935565622) internal successors, (35755), 31567 states have internal predecessors, (35755), 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) [2021-12-15 09:04:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31568 states to 31568 states and 35755 transitions. [2021-12-15 09:04:36,867 INFO L78 Accepts]: Start accepts. Automaton has 31568 states and 35755 transitions. Word has length 233 [2021-12-15 09:04:36,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:36,868 INFO L470 AbstractCegarLoop]: Abstraction has 31568 states and 35755 transitions. [2021-12-15 09:04:36,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-12-15 09:04:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 31568 states and 35755 transitions. [2021-12-15 09:04:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-15 09:04:36,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:36,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:36,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:37,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:37,096 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:37,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1368992567, now seen corresponding path program 1 times [2021-12-15 09:04:37,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:37,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775862773] [2021-12-15 09:04:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:37,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-15 09:04:37,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775862773] [2021-12-15 09:04:37,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775862773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:37,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:37,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:37,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128728296] [2021-12-15 09:04:37,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:37,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:37,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:37,150 INFO L87 Difference]: Start difference. First operand 31568 states and 35755 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2021-12-15 09:04:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:37,914 INFO L93 Difference]: Finished difference Result 74525 states and 84804 transitions. [2021-12-15 09:04:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 234 [2021-12-15 09:04:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:37,966 INFO L225 Difference]: With dead ends: 74525 [2021-12-15 09:04:37,967 INFO L226 Difference]: Without dead ends: 43570 [2021-12-15 09:04:37,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:37,992 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 231 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:37,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 143 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43570 states. [2021-12-15 09:04:38,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43570 to 41530. [2021-12-15 09:04:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41530 states, 41529 states have (on average 1.127934696236365) internal successors, (46842), 41529 states have internal predecessors, (46842), 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) [2021-12-15 09:04:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41530 states to 41530 states and 46842 transitions. [2021-12-15 09:04:38,633 INFO L78 Accepts]: Start accepts. Automaton has 41530 states and 46842 transitions. Word has length 234 [2021-12-15 09:04:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:38,633 INFO L470 AbstractCegarLoop]: Abstraction has 41530 states and 46842 transitions. [2021-12-15 09:04:38,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2021-12-15 09:04:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 41530 states and 46842 transitions. [2021-12-15 09:04:38,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-15 09:04:38,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:38,647 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:38,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:04:38,648 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash -147714927, now seen corresponding path program 1 times [2021-12-15 09:04:38,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:38,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840622529] [2021-12-15 09:04:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:38,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 84 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 09:04:38,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:38,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840622529] [2021-12-15 09:04:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840622529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:38,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185073818] [2021-12-15 09:04:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:38,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:38,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:38,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:38,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:04:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:38,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 09:04:39,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:39,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185073818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:39,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:39,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:04:39,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481532826] [2021-12-15 09:04:39,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:39,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:39,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:39,108 INFO L87 Difference]: Start difference. First operand 41530 states and 46842 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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) [2021-12-15 09:04:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:39,864 INFO L93 Difference]: Finished difference Result 82859 states and 93472 transitions. [2021-12-15 09:04:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:39,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 245 [2021-12-15 09:04:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:39,912 INFO L225 Difference]: With dead ends: 82859 [2021-12-15 09:04:39,912 INFO L226 Difference]: Without dead ends: 41534 [2021-12-15 09:04:39,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:39,933 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 215 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:39,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 87 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41534 states. [2021-12-15 09:04:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41534 to 41530. [2021-12-15 09:04:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41530 states, 41529 states have (on average 1.1131980062125262) internal successors, (46230), 41529 states have internal predecessors, (46230), 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) [2021-12-15 09:04:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41530 states to 41530 states and 46230 transitions. [2021-12-15 09:04:40,403 INFO L78 Accepts]: Start accepts. Automaton has 41530 states and 46230 transitions. Word has length 245 [2021-12-15 09:04:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:40,403 INFO L470 AbstractCegarLoop]: Abstraction has 41530 states and 46230 transitions. [2021-12-15 09:04:40,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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) [2021-12-15 09:04:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 41530 states and 46230 transitions. [2021-12-15 09:04:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-15 09:04:40,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:40,414 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:40,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:40,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:40,618 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:40,618 INFO L85 PathProgramCache]: Analyzing trace with hash -582406873, now seen corresponding path program 1 times [2021-12-15 09:04:40,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:40,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302246525] [2021-12-15 09:04:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:40,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 09:04:40,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:40,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302246525] [2021-12-15 09:04:40,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302246525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:40,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:40,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:40,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402747832] [2021-12-15 09:04:40,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:40,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:40,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:40,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:40,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:40,677 INFO L87 Difference]: Start difference. First operand 41530 states and 46230 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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) [2021-12-15 09:04:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:41,425 INFO L93 Difference]: Finished difference Result 82855 states and 92240 transitions. [2021-12-15 09:04:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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 252 [2021-12-15 09:04:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:41,479 INFO L225 Difference]: With dead ends: 82855 [2021-12-15 09:04:41,479 INFO L226 Difference]: Without dead ends: 41530 [2021-12-15 09:04:41,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:41,498 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:41,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 158 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41530 states. [2021-12-15 09:04:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41530 to 41530. [2021-12-15 09:04:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41530 states, 41529 states have (on average 1.1131739266536638) internal successors, (46229), 41529 states have internal predecessors, (46229), 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) [2021-12-15 09:04:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41530 states to 41530 states and 46229 transitions. [2021-12-15 09:04:42,025 INFO L78 Accepts]: Start accepts. Automaton has 41530 states and 46229 transitions. Word has length 252 [2021-12-15 09:04:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:42,025 INFO L470 AbstractCegarLoop]: Abstraction has 41530 states and 46229 transitions. [2021-12-15 09:04:42,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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) [2021-12-15 09:04:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 41530 states and 46229 transitions. [2021-12-15 09:04:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-15 09:04:42,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:42,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:04:42,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:04:42,036 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash 970509609, now seen corresponding path program 1 times [2021-12-15 09:04:42,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:42,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444912498] [2021-12-15 09:04:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:42,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 09:04:42,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:42,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444912498] [2021-12-15 09:04:42,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444912498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:42,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:42,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:42,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757752850] [2021-12-15 09:04:42,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:42,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:42,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:42,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:42,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:42,112 INFO L87 Difference]: Start difference. First operand 41530 states and 46229 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 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) [2021-12-15 09:04:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:42,792 INFO L93 Difference]: Finished difference Result 86124 states and 95920 transitions. [2021-12-15 09:04:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:42,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 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 258 [2021-12-15 09:04:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:42,846 INFO L225 Difference]: With dead ends: 86124 [2021-12-15 09:04:42,847 INFO L226 Difference]: Without dead ends: 44799 [2021-12-15 09:04:42,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:42,874 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 150 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:42,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 163 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44799 states. [2021-12-15 09:04:43,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44799 to 42958. [2021-12-15 09:04:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42958 states, 42957 states have (on average 1.1159066042786974) internal successors, (47936), 42957 states have internal predecessors, (47936), 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) [2021-12-15 09:04:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42958 states to 42958 states and 47936 transitions. [2021-12-15 09:04:43,589 INFO L78 Accepts]: Start accepts. Automaton has 42958 states and 47936 transitions. Word has length 258 [2021-12-15 09:04:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:43,589 INFO L470 AbstractCegarLoop]: Abstraction has 42958 states and 47936 transitions. [2021-12-15 09:04:43,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 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) [2021-12-15 09:04:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 42958 states and 47936 transitions. [2021-12-15 09:04:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-15 09:04:43,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:43,598 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:43,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:04:43,598 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash -340205230, now seen corresponding path program 1 times [2021-12-15 09:04:43,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353094114] [2021-12-15 09:04:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:43,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 09:04:43,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353094114] [2021-12-15 09:04:43,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353094114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:43,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003614783] [2021-12-15 09:04:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:43,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:43,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:43,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:43,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:04:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:04:43,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-15 09:04:44,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:44,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003614783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:44,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:44,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:44,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973836484] [2021-12-15 09:04:44,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:44,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:44,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:44,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:44,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:44,031 INFO L87 Difference]: Start difference. First operand 42958 states and 47936 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2021-12-15 09:04:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:44,689 INFO L93 Difference]: Finished difference Result 83656 states and 93248 transitions. [2021-12-15 09:04:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:44,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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 259 [2021-12-15 09:04:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:44,736 INFO L225 Difference]: With dead ends: 83656 [2021-12-15 09:04:44,737 INFO L226 Difference]: Without dead ends: 41107 [2021-12-15 09:04:44,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:44,763 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 219 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:44,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 311 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41107 states. [2021-12-15 09:04:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41107 to 38460. [2021-12-15 09:04:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38460 states, 38459 states have (on average 1.0907459892352895) internal successors, (41949), 38459 states have internal predecessors, (41949), 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) [2021-12-15 09:04:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38460 states to 38460 states and 41949 transitions. [2021-12-15 09:04:45,317 INFO L78 Accepts]: Start accepts. Automaton has 38460 states and 41949 transitions. Word has length 259 [2021-12-15 09:04:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:45,318 INFO L470 AbstractCegarLoop]: Abstraction has 38460 states and 41949 transitions. [2021-12-15 09:04:45,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2021-12-15 09:04:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 38460 states and 41949 transitions. [2021-12-15 09:04:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-15 09:04:45,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:45,328 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:45,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:45,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 09:04:45,529 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1138707456, now seen corresponding path program 1 times [2021-12-15 09:04:45,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:45,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443634737] [2021-12-15 09:04:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:45,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-15 09:04:45,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443634737] [2021-12-15 09:04:45,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443634737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:45,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:45,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:45,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764560200] [2021-12-15 09:04:45,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:45,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:45,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:45,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:45,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:45,710 INFO L87 Difference]: Start difference. First operand 38460 states and 41949 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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) [2021-12-15 09:04:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:46,573 INFO L93 Difference]: Finished difference Result 107810 states and 117682 transitions. [2021-12-15 09:04:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:46,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 280 [2021-12-15 09:04:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:46,660 INFO L225 Difference]: With dead ends: 107810 [2021-12-15 09:04:46,660 INFO L226 Difference]: Without dead ends: 69758 [2021-12-15 09:04:46,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:46,692 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 530 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:46,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 437 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69758 states. [2021-12-15 09:04:47,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69758 to 67720. [2021-12-15 09:04:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67720 states, 67719 states have (on average 1.0922931525864232) internal successors, (73969), 67719 states have internal predecessors, (73969), 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) [2021-12-15 09:04:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67720 states to 67720 states and 73969 transitions. [2021-12-15 09:04:47,619 INFO L78 Accepts]: Start accepts. Automaton has 67720 states and 73969 transitions. Word has length 280 [2021-12-15 09:04:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:47,620 INFO L470 AbstractCegarLoop]: Abstraction has 67720 states and 73969 transitions. [2021-12-15 09:04:47,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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) [2021-12-15 09:04:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 67720 states and 73969 transitions. [2021-12-15 09:04:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-15 09:04:47,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:47,635 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:47,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:04:47,635 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1138760523, now seen corresponding path program 1 times [2021-12-15 09:04:47,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590409238] [2021-12-15 09:04:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:47,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-15 09:04:47,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:47,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590409238] [2021-12-15 09:04:47,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590409238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:47,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263810415] [2021-12-15 09:04:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:47,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:47,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:47,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:47,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:04:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 09:04:48,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:48,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263810415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:48,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:48,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:48,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926649120] [2021-12-15 09:04:48,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:48,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:48,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:48,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:48,191 INFO L87 Difference]: Start difference. First operand 67720 states and 73969 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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) [2021-12-15 09:04:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:49,187 INFO L93 Difference]: Finished difference Result 153140 states and 167545 transitions. [2021-12-15 09:04:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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 299 [2021-12-15 09:04:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:49,310 INFO L225 Difference]: With dead ends: 153140 [2021-12-15 09:04:49,310 INFO L226 Difference]: Without dead ends: 86031 [2021-12-15 09:04:49,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:49,341 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:49,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 151 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86031 states. [2021-12-15 09:04:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86031 to 74626. [2021-12-15 09:04:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74626 states, 74625 states have (on average 1.095785594639866) internal successors, (81773), 74625 states have internal predecessors, (81773), 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) [2021-12-15 09:04:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74626 states to 74626 states and 81773 transitions. [2021-12-15 09:04:50,314 INFO L78 Accepts]: Start accepts. Automaton has 74626 states and 81773 transitions. Word has length 299 [2021-12-15 09:04:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:50,315 INFO L470 AbstractCegarLoop]: Abstraction has 74626 states and 81773 transitions. [2021-12-15 09:04:50,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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) [2021-12-15 09:04:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 74626 states and 81773 transitions. [2021-12-15 09:04:50,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-15 09:04:50,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:50,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:50,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:50,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:50,548 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:50,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash 54050235, now seen corresponding path program 1 times [2021-12-15 09:04:50,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:50,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972024797] [2021-12-15 09:04:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:50,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 143 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 09:04:50,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972024797] [2021-12-15 09:04:50,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972024797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105465273] [2021-12-15 09:04:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:50,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:50,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:50,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:50,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:04:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:50,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 09:04:51,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:51,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105465273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:51,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:51,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:04:51,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573591791] [2021-12-15 09:04:51,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:51,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:51,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:51,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:51,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:51,307 INFO L87 Difference]: Start difference. First operand 74626 states and 81773 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 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) [2021-12-15 09:04:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:52,091 INFO L93 Difference]: Finished difference Result 218792 states and 239888 transitions. [2021-12-15 09:04:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:52,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 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 311 [2021-12-15 09:04:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:52,272 INFO L225 Difference]: With dead ends: 218792 [2021-12-15 09:04:52,272 INFO L226 Difference]: Without dead ends: 144777 [2021-12-15 09:04:52,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:52,301 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 211 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:52,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 525 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:04:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144777 states. [2021-12-15 09:04:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144777 to 144567. [2021-12-15 09:04:54,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144567 states, 144566 states have (on average 1.0965925597996762) internal successors, (158530), 144566 states have internal predecessors, (158530), 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) [2021-12-15 09:04:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144567 states to 144567 states and 158530 transitions. [2021-12-15 09:04:54,458 INFO L78 Accepts]: Start accepts. Automaton has 144567 states and 158530 transitions. Word has length 311 [2021-12-15 09:04:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:54,459 INFO L470 AbstractCegarLoop]: Abstraction has 144567 states and 158530 transitions. [2021-12-15 09:04:54,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 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) [2021-12-15 09:04:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 144567 states and 158530 transitions. [2021-12-15 09:04:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-15 09:04:54,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:54,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:54,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:54,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:54,673 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:54,674 INFO L85 PathProgramCache]: Analyzing trace with hash -202236404, now seen corresponding path program 1 times [2021-12-15 09:04:54,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:54,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701170323] [2021-12-15 09:04:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:54,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 09:04:54,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:54,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701170323] [2021-12-15 09:04:54,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701170323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:54,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:54,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:54,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876626589] [2021-12-15 09:04:54,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:54,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:54,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:54,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:54,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:54,782 INFO L87 Difference]: Start difference. First operand 144567 states and 158530 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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) [2021-12-15 09:04:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:56,050 INFO L93 Difference]: Finished difference Result 288523 states and 316407 transitions. [2021-12-15 09:04:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:56,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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 322 [2021-12-15 09:04:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:56,244 INFO L225 Difference]: With dead ends: 288523 [2021-12-15 09:04:56,244 INFO L226 Difference]: Without dead ends: 144567 [2021-12-15 09:04:56,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:56,296 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 67 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:56,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 162 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144567 states. [2021-12-15 09:04:57,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144567 to 144567. [2021-12-15 09:04:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144567 states, 144566 states have (on average 1.09658564254389) internal successors, (158529), 144566 states have internal predecessors, (158529), 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) [2021-12-15 09:04:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144567 states to 144567 states and 158529 transitions. [2021-12-15 09:04:58,226 INFO L78 Accepts]: Start accepts. Automaton has 144567 states and 158529 transitions. Word has length 322 [2021-12-15 09:04:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:58,227 INFO L470 AbstractCegarLoop]: Abstraction has 144567 states and 158529 transitions. [2021-12-15 09:04:58,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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) [2021-12-15 09:04:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 144567 states and 158529 transitions. [2021-12-15 09:04:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-15 09:04:58,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:58,242 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:04:58,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 09:04:58,242 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:58,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1370838433, now seen corresponding path program 1 times [2021-12-15 09:04:58,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:58,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327202699] [2021-12-15 09:04:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:58,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 130 proven. 6 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-15 09:04:58,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327202699] [2021-12-15 09:04:58,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327202699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356157419] [2021-12-15 09:04:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:58,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:58,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:58,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:58,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:04:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:58,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:04:58,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-15 09:04:59,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:59,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356157419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:59,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:59,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:59,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625962129] [2021-12-15 09:04:59,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:59,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:59,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:59,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:04:59,228 INFO L87 Difference]: Start difference. First operand 144567 states and 158529 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-12-15 09:05:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:00,960 INFO L93 Difference]: Finished difference Result 379386 states and 415528 transitions. [2021-12-15 09:05:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:05:00,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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 328 [2021-12-15 09:05:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:01,304 INFO L225 Difference]: With dead ends: 379386 [2021-12-15 09:05:01,305 INFO L226 Difference]: Without dead ends: 235430 [2021-12-15 09:05:01,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:05:01,360 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 515 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:01,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 316 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235430 states. [2021-12-15 09:05:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235430 to 235012. [2021-12-15 09:05:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235012 states, 235011 states have (on average 1.0936296598882604) internal successors, (257015), 235011 states have internal predecessors, (257015), 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) [2021-12-15 09:05:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235012 states to 235012 states and 257015 transitions. [2021-12-15 09:05:04,628 INFO L78 Accepts]: Start accepts. Automaton has 235012 states and 257015 transitions. Word has length 328 [2021-12-15 09:05:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:04,629 INFO L470 AbstractCegarLoop]: Abstraction has 235012 states and 257015 transitions. [2021-12-15 09:05:04,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-12-15 09:05:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 235012 states and 257015 transitions. [2021-12-15 09:05:04,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-15 09:05:04,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:04,644 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:05:04,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:04,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-15 09:05:04,859 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:04,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash -374825101, now seen corresponding path program 1 times [2021-12-15 09:05:04,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:04,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120827439] [2021-12-15 09:05:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:04,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:05:04,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:04,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120827439] [2021-12-15 09:05:04,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120827439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:04,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:04,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:04,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658881721] [2021-12-15 09:05:04,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:04,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:05:04,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:04,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:05:04,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:04,958 INFO L87 Difference]: Start difference. First operand 235012 states and 257015 transitions. Second operand has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 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) [2021-12-15 09:05:07,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:07,183 INFO L93 Difference]: Finished difference Result 469616 states and 513584 transitions. [2021-12-15 09:05:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:05:07,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 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 328 [2021-12-15 09:05:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:07,565 INFO L225 Difference]: With dead ends: 469616 [2021-12-15 09:05:07,565 INFO L226 Difference]: Without dead ends: 235215 [2021-12-15 09:05:07,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:07,687 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 350 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:07,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 53 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:05:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235215 states. [2021-12-15 09:05:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235215 to 229937. [2021-12-15 09:05:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229937 states, 229936 states have (on average 1.0906948020318696) internal successors, (250790), 229936 states have internal predecessors, (250790), 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) [2021-12-15 09:05:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229937 states to 229937 states and 250790 transitions. [2021-12-15 09:05:11,014 INFO L78 Accepts]: Start accepts. Automaton has 229937 states and 250790 transitions. Word has length 328 [2021-12-15 09:05:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:11,014 INFO L470 AbstractCegarLoop]: Abstraction has 229937 states and 250790 transitions. [2021-12-15 09:05:11,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 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) [2021-12-15 09:05:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 229937 states and 250790 transitions. [2021-12-15 09:05:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-12-15 09:05:11,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:11,028 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:05:11,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 09:05:11,028 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash 495054327, now seen corresponding path program 1 times [2021-12-15 09:05:11,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:11,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248668945] [2021-12-15 09:05:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:11,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 163 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 09:05:11,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:11,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248668945] [2021-12-15 09:05:11,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248668945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:11,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646095675] [2021-12-15 09:05:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:11,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:11,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:11,135 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:11,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 09:05:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:11,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:05:11,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 09:05:11,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:11,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646095675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:11,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:11,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:11,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39256801] [2021-12-15 09:05:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:11,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:11,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:11,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:11,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:11,894 INFO L87 Difference]: Start difference. First operand 229937 states and 250790 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2021-12-15 09:05:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:13,847 INFO L93 Difference]: Finished difference Result 468030 states and 510785 transitions. [2021-12-15 09:05:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:13,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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 329 [2021-12-15 09:05:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted.