./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de42.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 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:08:09,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:08:09,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:08:09,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:08:09,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:08:09,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:08:09,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:08:09,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:08:09,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:08:09,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:08:09,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:08:09,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:08:09,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:08:09,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:08:09,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:08:09,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:08:09,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:08:09,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:08:09,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:08:09,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:08:09,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:08:09,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:08:09,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:08:09,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:08:09,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:08:09,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:08:09,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:08:09,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:08:09,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:08:09,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:08:09,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:08:09,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:08:09,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:08:09,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:08:09,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:08:09,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:08:09,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:08:09,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:08:09,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:08:09,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:08:09,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:08:09,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:08:09,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:08:09,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:08:09,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:08:09,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:08:09,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:08:09,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:08:09,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:08:09,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:08:09,609 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:08:09,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:08:09,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:08:09,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:08:09,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:08:09,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:08:09,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:08:09,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:08:09,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:08:09,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:08:09,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:08:09,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:08:09,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:08:09,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:08:09,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:08:09,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:08:09,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:08:09,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:08:09,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:08:09,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:08:09,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:08:09,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:08:09,613 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:08:09,613 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:08:09,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:08:09,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:08:09,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 [2021-12-16 00:08:09,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:08:09,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:08:09,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:08:09,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:08:09,841 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:08:09,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de42.c [2021-12-16 00:08:09,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5e3ba29/4b92f66d6b5342aab495c07839f4b8ad/FLAG563168e68 [2021-12-16 00:08:10,278 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:08:10,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c [2021-12-16 00:08:10,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5e3ba29/4b92f66d6b5342aab495c07839f4b8ad/FLAG563168e68 [2021-12-16 00:08:10,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5e3ba29/4b92f66d6b5342aab495c07839f4b8ad [2021-12-16 00:08:10,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:08:10,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:08:10,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:08:10,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:08:10,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:08:10,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0f24c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10, skipping insertion in model container [2021-12-16 00:08:10,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:08:10,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:08:10,405 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2021-12-16 00:08:10,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:08:10,424 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:08:10,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2021-12-16 00:08:10,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:08:10,443 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:08:10,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10 WrapperNode [2021-12-16 00:08:10,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:08:10,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:08:10,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:08:10,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:08:10,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,469 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-16 00:08:10,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:08:10,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:08:10,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:08:10,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:08:10,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:08:10,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:08:10,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:08:10,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:08:10,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (1/1) ... [2021-12-16 00:08:10,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:08:10,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:10,507 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) [2021-12-16 00:08:10,515 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 [2021-12-16 00:08:10,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:08:10,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:08:10,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:08:10,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:08:10,574 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:08:10,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:08:10,648 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:08:10,652 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:08:10,652 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 00:08:10,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:08:10 BoogieIcfgContainer [2021-12-16 00:08:10,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:08:10,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:08:10,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:08:10,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:08:10,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:08:10" (1/3) ... [2021-12-16 00:08:10,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182edbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:08:10, skipping insertion in model container [2021-12-16 00:08:10,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:10" (2/3) ... [2021-12-16 00:08:10,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182edbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:08:10, skipping insertion in model container [2021-12-16 00:08:10,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:08:10" (3/3) ... [2021-12-16 00:08:10,669 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de42.c [2021-12-16 00:08:10,674 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:08:10,674 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:08:10,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:08:10,720 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 [2021-12-16 00:08:10,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:08:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 00:08:10,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:10,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:10,748 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2021-12-16 00:08:10,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:10,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481219035] [2021-12-16 00:08:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:10,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:10,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:10,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481219035] [2021-12-16 00:08:10,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481219035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:08:10,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:08:10,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 00:08:10,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109082755] [2021-12-16 00:08:10,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:08:10,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:08:10,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:08:10,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:08:10,921 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:10,933 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2021-12-16 00:08:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:08:10,936 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-16 00:08:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:10,941 INFO L225 Difference]: With dead ends: 27 [2021-12-16 00:08:10,941 INFO L226 Difference]: Without dead ends: 11 [2021-12-16 00:08:10,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:08:10,948 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:10,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:08:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-16 00:08:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-16 00:08:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-12-16 00:08:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-12-16 00:08:10,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2021-12-16 00:08:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:10,987 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-12-16 00:08:10,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-12-16 00:08:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 00:08:10,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:10,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:10,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 00:08:10,991 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2021-12-16 00:08:10,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:10,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932619609] [2021-12-16 00:08:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:10,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:11,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:11,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932619609] [2021-12-16 00:08:11,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932619609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:08:11,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:08:11,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 00:08:11,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281439894] [2021-12-16 00:08:11,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:08:11,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:08:11,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:08:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:08:11,325 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:11,448 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-12-16 00:08:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:08:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-16 00:08:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:11,449 INFO L225 Difference]: With dead ends: 29 [2021-12-16 00:08:11,449 INFO L226 Difference]: Without dead ends: 21 [2021-12-16 00:08:11,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:08:11,450 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:11,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:08:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-16 00:08:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-12-16 00:08:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-12-16 00:08:11,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 10 [2021-12-16 00:08:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:11,455 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-12-16 00:08:11,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-12-16 00:08:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 00:08:11,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:11,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:11,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 00:08:11,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash 105287507, now seen corresponding path program 1 times [2021-12-16 00:08:11,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:11,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078271397] [2021-12-16 00:08:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:11,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:11,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078271397] [2021-12-16 00:08:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078271397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:08:11,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:08:11,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 00:08:11,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511315165] [2021-12-16 00:08:11,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:08:11,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 00:08:11,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 00:08:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 00:08:11,483 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:11,490 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-12-16 00:08:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 00:08:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 00:08:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:11,491 INFO L225 Difference]: With dead ends: 30 [2021-12-16 00:08:11,491 INFO L226 Difference]: Without dead ends: 21 [2021-12-16 00:08:11,491 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 [2021-12-16 00:08:11,492 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:11,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:08:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-16 00:08:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-12-16 00:08:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-12-16 00:08:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-12-16 00:08:11,495 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 11 [2021-12-16 00:08:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:11,495 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-12-16 00:08:11,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-12-16 00:08:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 00:08:11,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:11,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:11,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 00:08:11,497 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:11,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:11,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1508115906, now seen corresponding path program 1 times [2021-12-16 00:08:11,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:11,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231041020] [2021-12-16 00:08:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:11,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:11,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:11,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231041020] [2021-12-16 00:08:11,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231041020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:08:11,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:08:11,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 00:08:11,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016528110] [2021-12-16 00:08:11,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:08:11,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:08:11,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:11,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:08:11,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 00:08:11,523 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:11,538 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-12-16 00:08:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:08:11,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 00:08:11,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:11,539 INFO L225 Difference]: With dead ends: 21 [2021-12-16 00:08:11,539 INFO L226 Difference]: Without dead ends: 12 [2021-12-16 00:08:11,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:08:11,540 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:11,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:08:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-16 00:08:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-16 00:08:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-12-16 00:08:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-12-16 00:08:11,542 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 11 [2021-12-16 00:08:11,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:11,543 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-12-16 00:08:11,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:11,543 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-12-16 00:08:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 00:08:11,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:11,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:11,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 00:08:11,544 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:11,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2021-12-16 00:08:11,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:11,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492649329] [2021-12-16 00:08:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:11,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:11,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:11,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492649329] [2021-12-16 00:08:11,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492649329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:11,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354608281] [2021-12-16 00:08:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:11,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:11,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:11,597 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) [2021-12-16 00:08:11,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:08:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:11,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:08:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:11,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:11,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354608281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:11,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:11,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-16 00:08:11,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506654660] [2021-12-16 00:08:11,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:11,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 00:08:11,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 00:08:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:08:11,766 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:11,859 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2021-12-16 00:08:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 00:08:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 00:08:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:11,863 INFO L225 Difference]: With dead ends: 40 [2021-12-16 00:08:11,864 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 00:08:11,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:08:11,870 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:11,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 41 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:08:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 00:08:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-12-16 00:08:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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) [2021-12-16 00:08:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-12-16 00:08:11,881 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2021-12-16 00:08:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:11,881 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-12-16 00:08:11,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-12-16 00:08:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 00:08:11,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:11,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:11,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:12,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:12,083 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:12,083 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2021-12-16 00:08:12,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:12,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469366097] [2021-12-16 00:08:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:12,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:08:12,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:12,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469366097] [2021-12-16 00:08:12,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469366097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:12,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116986814] [2021-12-16 00:08:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:12,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:12,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:12,132 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) [2021-12-16 00:08:12,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:08:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:12,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 00:08:12,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:08:12,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:08:12,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116986814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:12,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:12,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-12-16 00:08:12,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866031425] [2021-12-16 00:08:12,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:12,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:08:12,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:08:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 00:08:12,277 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:12,301 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-12-16 00:08:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:08:12,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 00:08:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:12,302 INFO L225 Difference]: With dead ends: 39 [2021-12-16 00:08:12,302 INFO L226 Difference]: Without dead ends: 35 [2021-12-16 00:08:12,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 00:08:12,304 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:12,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:08:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-16 00:08:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-16 00:08:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 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) [2021-12-16 00:08:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-12-16 00:08:12,313 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2021-12-16 00:08:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:12,315 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-12-16 00:08:12,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-12-16 00:08:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 00:08:12,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:12,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:12,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:12,531 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,SelfDestructingSolverStorable5 [2021-12-16 00:08:12,532 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2021-12-16 00:08:12,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228401664] [2021-12-16 00:08:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:12,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:12,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:12,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228401664] [2021-12-16 00:08:12,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228401664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:12,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222424198] [2021-12-16 00:08:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:12,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:12,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:12,712 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) [2021-12-16 00:08:12,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:08:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 00:08:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:13,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:13,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222424198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:13,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:13,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 23 [2021-12-16 00:08:13,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520759038] [2021-12-16 00:08:13,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:13,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 00:08:13,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:13,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 00:08:13,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-16 00:08:13,481 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 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) [2021-12-16 00:08:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:13,937 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-12-16 00:08:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 00:08:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 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 14 [2021-12-16 00:08:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:13,938 INFO L225 Difference]: With dead ends: 45 [2021-12-16 00:08:13,938 INFO L226 Difference]: Without dead ends: 28 [2021-12-16 00:08:13,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-12-16 00:08:13,939 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:13,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 63 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 00:08:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-16 00:08:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-16 00:08:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2021-12-16 00:08:13,941 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 14 [2021-12-16 00:08:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:13,942 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2021-12-16 00:08:13,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 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) [2021-12-16 00:08:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2021-12-16 00:08:13,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 00:08:13,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:13,942 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:13,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 00:08:14,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:14,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2021-12-16 00:08:14,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:14,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879119525] [2021-12-16 00:08:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:14,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:14,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:14,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879119525] [2021-12-16 00:08:14,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879119525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:14,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115269809] [2021-12-16 00:08:14,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:08:14,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:14,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:14,213 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) [2021-12-16 00:08:14,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:08:14,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:08:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:14,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 00:08:14,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:14,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:14,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115269809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:14,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:14,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-16 00:08:14,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635174405] [2021-12-16 00:08:14,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:14,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 00:08:14,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 00:08:14,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:08:14,373 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:14,870 INFO L93 Difference]: Finished difference Result 109 states and 181 transitions. [2021-12-16 00:08:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 00:08:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-16 00:08:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:14,871 INFO L225 Difference]: With dead ends: 109 [2021-12-16 00:08:14,871 INFO L226 Difference]: Without dead ends: 99 [2021-12-16 00:08:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2021-12-16 00:08:14,872 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 135 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:14,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 98 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 00:08:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-16 00:08:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 54. [2021-12-16 00:08:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 53 states have internal predecessors, (77), 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) [2021-12-16 00:08:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2021-12-16 00:08:14,877 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 14 [2021-12-16 00:08:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:14,877 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2021-12-16 00:08:14,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2021-12-16 00:08:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 00:08:14,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:14,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:14,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:15,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:15,087 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:15,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 2 times [2021-12-16 00:08:15,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:15,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38732271] [2021-12-16 00:08:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:15,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:08:15,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:15,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38732271] [2021-12-16 00:08:15,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38732271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:15,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821905987] [2021-12-16 00:08:15,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:08:15,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:15,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:15,144 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) [2021-12-16 00:08:15,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:08:15,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:08:15,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 00:08:15,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:08:15,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:08:15,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821905987] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:15,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:15,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2021-12-16 00:08:15,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035541077] [2021-12-16 00:08:15,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:15,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 00:08:15,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 00:08:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:08:15,298 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2021-12-16 00:08:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:15,399 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2021-12-16 00:08:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 00:08:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 16 [2021-12-16 00:08:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:15,400 INFO L225 Difference]: With dead ends: 85 [2021-12-16 00:08:15,400 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 00:08:15,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:08:15,402 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:15,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:08:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 00:08:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2021-12-16 00:08:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 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) [2021-12-16 00:08:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2021-12-16 00:08:15,407 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 16 [2021-12-16 00:08:15,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:15,407 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2021-12-16 00:08:15,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2021-12-16 00:08:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2021-12-16 00:08:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 00:08:15,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:15,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:15,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:15,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:15,622 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 2 times [2021-12-16 00:08:15,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:15,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277855173] [2021-12-16 00:08:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:15,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 00:08:15,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:15,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277855173] [2021-12-16 00:08:15,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277855173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:15,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973891306] [2021-12-16 00:08:15,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:08:15,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:15,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:15,666 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) [2021-12-16 00:08:15,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:08:15,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:08:15,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:15,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 00:08:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 00:08:15,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 00:08:15,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973891306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:15,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:15,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2021-12-16 00:08:15,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409507012] [2021-12-16 00:08:15,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:15,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:08:15,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:08:15,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:08:15,775 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:15,806 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2021-12-16 00:08:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:08:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-16 00:08:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:15,807 INFO L225 Difference]: With dead ends: 72 [2021-12-16 00:08:15,807 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 00:08:15,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:08:15,808 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:15,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 44 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:08:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 00:08:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-12-16 00:08:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 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) [2021-12-16 00:08:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 90 transitions. [2021-12-16 00:08:15,812 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 90 transitions. Word has length 16 [2021-12-16 00:08:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:15,812 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 90 transitions. [2021-12-16 00:08:15,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 90 transitions. [2021-12-16 00:08:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 00:08:15,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:15,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:15,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:16,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:16,029 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 3 times [2021-12-16 00:08:16,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:16,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45696158] [2021-12-16 00:08:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:16,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:16,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45696158] [2021-12-16 00:08:16,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45696158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076264960] [2021-12-16 00:08:16,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 00:08:16,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:16,391 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) [2021-12-16 00:08:16,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 00:08:16,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 00:08:16,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:16,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 00:08:16,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:16,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:17,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076264960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:17,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:17,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 35 [2021-12-16 00:08:17,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141703877] [2021-12-16 00:08:17,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:17,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 00:08:17,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:17,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 00:08:17,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 00:08:17,568 INFO L87 Difference]: Start difference. First operand 64 states and 90 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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) [2021-12-16 00:08:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:18,486 INFO L93 Difference]: Finished difference Result 84 states and 113 transitions. [2021-12-16 00:08:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 00:08:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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 18 [2021-12-16 00:08:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:18,487 INFO L225 Difference]: With dead ends: 84 [2021-12-16 00:08:18,487 INFO L226 Difference]: Without dead ends: 62 [2021-12-16 00:08:18,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=306, Invalid=1674, Unknown=0, NotChecked=0, Total=1980 [2021-12-16 00:08:18,488 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:18,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 98 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 00:08:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-16 00:08:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-12-16 00:08:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 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) [2021-12-16 00:08:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2021-12-16 00:08:18,492 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 18 [2021-12-16 00:08:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:18,492 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2021-12-16 00:08:18,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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) [2021-12-16 00:08:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2021-12-16 00:08:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 00:08:18,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:18,493 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:18,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:18,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:18,699 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash 469660332, now seen corresponding path program 4 times [2021-12-16 00:08:18,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:18,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518236743] [2021-12-16 00:08:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:18,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 00:08:18,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518236743] [2021-12-16 00:08:18,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518236743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136059471] [2021-12-16 00:08:18,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 00:08:18,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:18,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:18,770 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) [2021-12-16 00:08:18,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 00:08:18,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 00:08:18,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:18,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 00:08:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 00:08:18,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 00:08:18,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136059471] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:18,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:18,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-16 00:08:18,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826023083] [2021-12-16 00:08:18,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:18,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 00:08:18,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:18,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 00:08:18,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-16 00:08:18,957 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 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) [2021-12-16 00:08:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:20,921 INFO L93 Difference]: Finished difference Result 167 states and 251 transitions. [2021-12-16 00:08:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-16 00:08:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 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 18 [2021-12-16 00:08:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:20,922 INFO L225 Difference]: With dead ends: 167 [2021-12-16 00:08:20,922 INFO L226 Difference]: Without dead ends: 145 [2021-12-16 00:08:20,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1018, Invalid=2764, Unknown=0, NotChecked=0, Total=3782 [2021-12-16 00:08:20,924 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 190 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:20,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 107 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 00:08:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-16 00:08:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 79. [2021-12-16 00:08:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.4102564102564104) internal successors, (110), 78 states have internal predecessors, (110), 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) [2021-12-16 00:08:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 110 transitions. [2021-12-16 00:08:20,930 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 110 transitions. Word has length 18 [2021-12-16 00:08:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:20,930 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 110 transitions. [2021-12-16 00:08:20,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 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) [2021-12-16 00:08:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 110 transitions. [2021-12-16 00:08:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 00:08:20,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:20,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:20,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:21,149 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,SelfDestructingSolverStorable11 [2021-12-16 00:08:21,150 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 3 times [2021-12-16 00:08:21,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:21,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638280080] [2021-12-16 00:08:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:21,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 00:08:21,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638280080] [2021-12-16 00:08:21,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638280080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336109915] [2021-12-16 00:08:21,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 00:08:21,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:21,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:21,227 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) [2021-12-16 00:08:21,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 00:08:21,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 00:08:21,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:21,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 00:08:21,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 00:08:21,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 00:08:21,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336109915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:21,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:21,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2021-12-16 00:08:21,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609150817] [2021-12-16 00:08:21,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:21,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 00:08:21,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 00:08:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:08:21,364 INFO L87 Difference]: Start difference. First operand 79 states and 110 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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) [2021-12-16 00:08:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:21,431 INFO L93 Difference]: Finished difference Result 105 states and 148 transitions. [2021-12-16 00:08:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 00:08:21,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 19 [2021-12-16 00:08:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:21,432 INFO L225 Difference]: With dead ends: 105 [2021-12-16 00:08:21,432 INFO L226 Difference]: Without dead ends: 101 [2021-12-16 00:08:21,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:08:21,432 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:21,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 82 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:08:21,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-16 00:08:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-12-16 00:08:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 93 states have internal predecessors, (132), 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) [2021-12-16 00:08:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 132 transitions. [2021-12-16 00:08:21,439 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 132 transitions. Word has length 19 [2021-12-16 00:08:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:21,439 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 132 transitions. [2021-12-16 00:08:21,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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) [2021-12-16 00:08:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 132 transitions. [2021-12-16 00:08:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 00:08:21,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:21,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:21,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:21,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 00:08:21,657 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:21,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 5 times [2021-12-16 00:08:21,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:21,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603476173] [2021-12-16 00:08:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:21,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:08:21,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603476173] [2021-12-16 00:08:21,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603476173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940045387] [2021-12-16 00:08:21,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 00:08:21,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:21,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:21,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:08:21,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 00:08:21,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-16 00:08:21,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:21,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 00:08:21,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:08:21,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:08:21,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940045387] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:21,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:21,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-12-16 00:08:21,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661001709] [2021-12-16 00:08:21,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:21,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 00:08:21,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:21,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 00:08:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:08:21,943 INFO L87 Difference]: Start difference. First operand 94 states and 132 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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) [2021-12-16 00:08:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:22,184 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2021-12-16 00:08:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 00:08:22,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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 20 [2021-12-16 00:08:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:22,185 INFO L225 Difference]: With dead ends: 143 [2021-12-16 00:08:22,185 INFO L226 Difference]: Without dead ends: 127 [2021-12-16 00:08:22,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-12-16 00:08:22,186 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:22,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 105 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:08:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-16 00:08:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2021-12-16 00:08:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4) internal successors, (126), 90 states have internal predecessors, (126), 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) [2021-12-16 00:08:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 126 transitions. [2021-12-16 00:08:22,196 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 126 transitions. Word has length 20 [2021-12-16 00:08:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:22,197 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 126 transitions. [2021-12-16 00:08:22,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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) [2021-12-16 00:08:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 126 transitions. [2021-12-16 00:08:22,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 00:08:22,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:22,198 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:22,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:22,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 00:08:22,411 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:22,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:22,412 INFO L85 PathProgramCache]: Analyzing trace with hash 401524257, now seen corresponding path program 3 times [2021-12-16 00:08:22,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:22,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834382795] [2021-12-16 00:08:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:22,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:22,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:22,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834382795] [2021-12-16 00:08:22,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834382795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:22,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670501464] [2021-12-16 00:08:22,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 00:08:22,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:22,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:22,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:08:22,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 00:08:22,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-16 00:08:22,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:22,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 00:08:22,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:22,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:22,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670501464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:22,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:22,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2021-12-16 00:08:22,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503425567] [2021-12-16 00:08:22,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:22,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 00:08:22,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:22,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 00:08:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-12-16 00:08:22,939 INFO L87 Difference]: Start difference. First operand 91 states and 126 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:34,783 INFO L93 Difference]: Finished difference Result 397 states and 609 transitions. [2021-12-16 00:08:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-16 00:08:34,783 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 00:08:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:34,784 INFO L225 Difference]: With dead ends: 397 [2021-12-16 00:08:34,784 INFO L226 Difference]: Without dead ends: 365 [2021-12-16 00:08:34,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=811, Invalid=1541, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 00:08:34,785 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 617 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:34,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 415 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 00:08:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-16 00:08:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 141. [2021-12-16 00:08:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3928571428571428) internal successors, (195), 140 states have internal predecessors, (195), 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) [2021-12-16 00:08:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 195 transitions. [2021-12-16 00:08:34,797 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 195 transitions. Word has length 21 [2021-12-16 00:08:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:34,797 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 195 transitions. [2021-12-16 00:08:34,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:08:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 195 transitions. [2021-12-16 00:08:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 00:08:34,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:34,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:34,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:35,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 00:08:35,002 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:35,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:35,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 6 times [2021-12-16 00:08:35,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:35,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885720188] [2021-12-16 00:08:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:35,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:35,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:35,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885720188] [2021-12-16 00:08:35,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885720188] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:35,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659234220] [2021-12-16 00:08:35,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 00:08:35,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:35,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:35,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:08:35,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 00:08:35,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-16 00:08:35,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:35,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-16 00:08:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:36,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:08:37,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659234220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:37,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:37,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15] total 41 [2021-12-16 00:08:37,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252705104] [2021-12-16 00:08:37,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:37,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 00:08:37,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 00:08:37,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 00:08:37,786 INFO L87 Difference]: Start difference. First operand 141 states and 195 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 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) [2021-12-16 00:08:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:40,328 INFO L93 Difference]: Finished difference Result 162 states and 219 transitions. [2021-12-16 00:08:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 00:08:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 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 22 [2021-12-16 00:08:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:40,330 INFO L225 Difference]: With dead ends: 162 [2021-12-16 00:08:40,330 INFO L226 Difference]: Without dead ends: 148 [2021-12-16 00:08:40,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=229, Invalid=2221, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 00:08:40,331 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:40,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 117 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-16 00:08:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-16 00:08:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2021-12-16 00:08:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.3732394366197183) internal successors, (195), 142 states have internal predecessors, (195), 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) [2021-12-16 00:08:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 195 transitions. [2021-12-16 00:08:40,339 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 195 transitions. Word has length 22 [2021-12-16 00:08:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:40,340 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 195 transitions. [2021-12-16 00:08:40,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 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) [2021-12-16 00:08:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 195 transitions. [2021-12-16 00:08:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 00:08:40,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:40,341 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:40,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:40,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 00:08:40,545 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 4 times [2021-12-16 00:08:40,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:40,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287925846] [2021-12-16 00:08:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:40,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:08:40,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:40,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287925846] [2021-12-16 00:08:40,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287925846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:40,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862146072] [2021-12-16 00:08:40,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 00:08:40,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:40,619 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:08:40,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 00:08:40,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 00:08:40,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:40,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 00:08:40,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:08:40,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:08:40,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862146072] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:40,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:40,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2021-12-16 00:08:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241474472] [2021-12-16 00:08:40,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:40,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 00:08:40,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 00:08:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:08:40,764 INFO L87 Difference]: Start difference. First operand 143 states and 195 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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) [2021-12-16 00:08:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:40,852 INFO L93 Difference]: Finished difference Result 183 states and 253 transitions. [2021-12-16 00:08:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 00:08:40,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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 22 [2021-12-16 00:08:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:40,853 INFO L225 Difference]: With dead ends: 183 [2021-12-16 00:08:40,853 INFO L226 Difference]: Without dead ends: 179 [2021-12-16 00:08:40,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:08:40,854 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:40,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 142 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:08:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-16 00:08:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2021-12-16 00:08:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.3950617283950617) internal successors, (226), 162 states have internal predecessors, (226), 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) [2021-12-16 00:08:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 226 transitions. [2021-12-16 00:08:40,864 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 226 transitions. Word has length 22 [2021-12-16 00:08:40,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:40,864 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 226 transitions. [2021-12-16 00:08:40,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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) [2021-12-16 00:08:40,865 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 226 transitions. [2021-12-16 00:08:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 00:08:40,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:40,866 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:40,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:41,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 00:08:41,086 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1482516206, now seen corresponding path program 7 times [2021-12-16 00:08:41,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:41,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279248855] [2021-12-16 00:08:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:41,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:08:41,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:41,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279248855] [2021-12-16 00:08:41,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279248855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:41,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096869929] [2021-12-16 00:08:41,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 00:08:41,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:41,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:41,140 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:08:41,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 00:08:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 00:08:41,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:08:41,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:08:41,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096869929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:41,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:41,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-12-16 00:08:41,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017926269] [2021-12-16 00:08:41,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:41,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 00:08:41,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 00:08:41,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:08:41,255 INFO L87 Difference]: Start difference. First operand 163 states and 226 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-16 00:08:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:41,293 INFO L93 Difference]: Finished difference Result 182 states and 246 transitions. [2021-12-16 00:08:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:08:41,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 23 [2021-12-16 00:08:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:41,295 INFO L225 Difference]: With dead ends: 182 [2021-12-16 00:08:41,295 INFO L226 Difference]: Without dead ends: 162 [2021-12-16 00:08:41,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:08:41,296 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:41,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:08:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-16 00:08:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2021-12-16 00:08:41,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3860759493670887) internal successors, (219), 158 states have internal predecessors, (219), 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) [2021-12-16 00:08:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 219 transitions. [2021-12-16 00:08:41,307 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 219 transitions. Word has length 23 [2021-12-16 00:08:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:41,307 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 219 transitions. [2021-12-16 00:08:41,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-16 00:08:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 219 transitions. [2021-12-16 00:08:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 00:08:41,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:41,308 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:41,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-16 00:08:41,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:41,523 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 5 times [2021-12-16 00:08:41,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:41,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200507597] [2021-12-16 00:08:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:41,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:08:41,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:41,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200507597] [2021-12-16 00:08:41,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200507597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:41,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141417711] [2021-12-16 00:08:41,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 00:08:41,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:41,616 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:08:41,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 00:08:41,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 00:08:41,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:08:41,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 00:08:41,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:08:41,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:08:42,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141417711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:42,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:42,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2021-12-16 00:08:42,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219382792] [2021-12-16 00:08:42,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:42,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 00:08:42,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:42,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 00:08:42,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-12-16 00:08:42,005 INFO L87 Difference]: Start difference. First operand 159 states and 219 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2021-12-16 00:08:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:08:42,523 INFO L93 Difference]: Finished difference Result 289 states and 365 transitions. [2021-12-16 00:08:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-16 00:08:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 23 [2021-12-16 00:08:42,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:08:42,524 INFO L225 Difference]: With dead ends: 289 [2021-12-16 00:08:42,524 INFO L226 Difference]: Without dead ends: 269 [2021-12-16 00:08:42,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 00:08:42,525 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 123 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:08:42,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 154 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 00:08:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-16 00:08:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 173. [2021-12-16 00:08:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4069767441860466) internal successors, (242), 172 states have internal predecessors, (242), 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) [2021-12-16 00:08:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 242 transitions. [2021-12-16 00:08:42,536 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 242 transitions. Word has length 23 [2021-12-16 00:08:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:08:42,536 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 242 transitions. [2021-12-16 00:08:42,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2021-12-16 00:08:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 242 transitions. [2021-12-16 00:08:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 00:08:42,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:08:42,537 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:08:42,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 00:08:42,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:42,741 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:08:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:08:42,741 INFO L85 PathProgramCache]: Analyzing trace with hash 418509715, now seen corresponding path program 1 times [2021-12-16 00:08:42,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:08:42,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757653966] [2021-12-16 00:08:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:42,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:08:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:08:42,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:08:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757653966] [2021-12-16 00:08:42,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757653966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:08:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143262871] [2021-12-16 00:08:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:08:42,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:08:42,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:08:42,881 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:08:42,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 00:08:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:08:42,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 00:08:42,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:08:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:08:42,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:08:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:08:43,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143262871] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:08:43,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:08:43,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-16 00:08:43,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907560575] [2021-12-16 00:08:43,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:08:43,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 00:08:43,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:08:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 00:08:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-12-16 00:08:43,267 INFO L87 Difference]: Start difference. First operand 173 states and 242 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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) [2021-12-16 00:09:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:09:23,825 INFO L93 Difference]: Finished difference Result 548 states and 838 transitions. [2021-12-16 00:09:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-16 00:09:23,825 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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 23 [2021-12-16 00:09:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:09:23,827 INFO L225 Difference]: With dead ends: 548 [2021-12-16 00:09:23,827 INFO L226 Difference]: Without dead ends: 520 [2021-12-16 00:09:23,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=1802, Invalid=4050, Unknown=0, NotChecked=0, Total=5852 [2021-12-16 00:09:23,829 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 761 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:09:23,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 369 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 00:09:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-16 00:09:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 184. [2021-12-16 00:09:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.4043715846994536) internal successors, (257), 183 states have internal predecessors, (257), 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) [2021-12-16 00:09:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 257 transitions. [2021-12-16 00:09:23,853 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 257 transitions. Word has length 23 [2021-12-16 00:09:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:09:23,855 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 257 transitions. [2021-12-16 00:09:23,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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) [2021-12-16 00:09:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 257 transitions. [2021-12-16 00:09:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 00:09:23,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:09:23,857 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:09:23,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 00:09:24,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:09:24,066 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:09:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:09:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 6 times [2021-12-16 00:09:24,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:09:24,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714043939] [2021-12-16 00:09:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:09:24,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:09:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:09:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 00:09:24,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:09:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714043939] [2021-12-16 00:09:24,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714043939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:09:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809872975] [2021-12-16 00:09:24,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 00:09:24,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:09:24,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:09:24,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:09:24,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 00:09:24,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-16 00:09:24,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:09:24,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 00:09:24,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:09:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 00:09:24,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:09:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 00:09:24,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809872975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:09:24,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:09:24,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2021-12-16 00:09:24,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434179176] [2021-12-16 00:09:24,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:09:24,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 00:09:24,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:09:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 00:09:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:09:24,372 INFO L87 Difference]: Start difference. First operand 184 states and 257 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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) [2021-12-16 00:09:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:09:24,474 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2021-12-16 00:09:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 00:09:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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 25 [2021-12-16 00:09:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:09:24,475 INFO L225 Difference]: With dead ends: 228 [2021-12-16 00:09:24,476 INFO L226 Difference]: Without dead ends: 224 [2021-12-16 00:09:24,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:09:24,477 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:09:24,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 131 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:09:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-16 00:09:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 215. [2021-12-16 00:09:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4158878504672898) internal successors, (303), 214 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:09:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 303 transitions. [2021-12-16 00:09:24,490 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 303 transitions. Word has length 25 [2021-12-16 00:09:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:09:24,490 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 303 transitions. [2021-12-16 00:09:24,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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) [2021-12-16 00:09:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 303 transitions. [2021-12-16 00:09:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 00:09:24,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:09:24,492 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:09:24,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 00:09:24,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:09:24,700 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:09:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:09:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 8 times [2021-12-16 00:09:24,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:09:24,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758334744] [2021-12-16 00:09:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:09:24,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:09:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:09:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:09:25,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:09:25,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758334744] [2021-12-16 00:09:25,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758334744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:09:25,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360786060] [2021-12-16 00:09:25,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:09:25,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:09:25,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:09:25,253 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:09:25,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 00:09:25,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:09:25,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:09:25,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-16 00:09:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:09:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:09:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates...