./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.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/recursive-simple/id_i20_o20-1.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 c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:25:02,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:25:02,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:25:02,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:25:02,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:25:02,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:25:02,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:25:02,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:25:02,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:25:02,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:25:02,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:25:02,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:25:02,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:25:02,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:25:02,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:25:02,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:25:02,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:25:02,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:25:02,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:25:02,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:25:02,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:25:02,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:25:02,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:25:02,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:25:02,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:25:02,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:25:02,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:25:02,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:25:02,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:25:02,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:25:02,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:25:02,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:25:02,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:25:02,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:25:02,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:25:02,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:25:02,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:25:02,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:25:02,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:25:02,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:25:02,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:25:02,515 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:25:02,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:25:02,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:25:02,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:25:02,558 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:25:02,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:25:02,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:25:02,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:25:02,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:25:02,560 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:25:02,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:25:02,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:25:02,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:25:02,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:25:02,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:25:02,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:25:02,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:25:02,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:25:02,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:25:02,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:25:02,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:25:02,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:25:02,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:25:02,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:25:02,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:25:02,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:25:02,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:25:02,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:25:02,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:25:02,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:25:02,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:25:02,567 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:25:02,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:25:02,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:25:02,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:25:02,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 [2021-12-17 15:25:02,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:25:02,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:25:02,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:25:02,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:25:02,805 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:25:02,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2021-12-17 15:25:02,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a81848565/d3ff20c2939344e2a8ab104af8a495ec/FLAG85db0152e [2021-12-17 15:25:03,207 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:25:03,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2021-12-17 15:25:03,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a81848565/d3ff20c2939344e2a8ab104af8a495ec/FLAG85db0152e [2021-12-17 15:25:03,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a81848565/d3ff20c2939344e2a8ab104af8a495ec [2021-12-17 15:25:03,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:25:03,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:25:03,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:25:03,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:25:03,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:25:03,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8371d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03, skipping insertion in model container [2021-12-17 15:25:03,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:25:03,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:25:03,376 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/recursive-simple/id_i20_o20-1.c[454,467] [2021-12-17 15:25:03,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:25:03,389 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:25:03,400 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/recursive-simple/id_i20_o20-1.c[454,467] [2021-12-17 15:25:03,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:25:03,411 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:25:03,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03 WrapperNode [2021-12-17 15:25:03,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:25:03,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:25:03,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:25:03,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:25:03,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,435 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2021-12-17 15:25:03,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:25:03,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:25:03,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:25:03,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:25:03,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:25:03,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:25:03,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:25:03,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:25:03,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (1/1) ... [2021-12-17 15:25:03,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:25:03,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:03,481 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) [2021-12-17 15:25:03,493 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 [2021-12-17 15:25:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:25:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:25:03,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:25:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:25:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-12-17 15:25:03,522 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-12-17 15:25:03,573 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:25:03,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:25:03,674 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:25:03,679 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:25:03,679 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 15:25:03,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:25:03 BoogieIcfgContainer [2021-12-17 15:25:03,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:25:03,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:25:03,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:25:03,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:25:03,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:25:03" (1/3) ... [2021-12-17 15:25:03,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ae0ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:25:03, skipping insertion in model container [2021-12-17 15:25:03,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:03" (2/3) ... [2021-12-17 15:25:03,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ae0ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:25:03, skipping insertion in model container [2021-12-17 15:25:03,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:25:03" (3/3) ... [2021-12-17 15:25:03,689 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2021-12-17 15:25:03,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:25:03,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:25:03,731 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:25:03,740 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 [2021-12-17 15:25:03,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:25:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 15:25:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 15:25:03,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:03,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:03,788 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-12-17 15:25:03,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:03,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779449677] [2021-12-17 15:25:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:03,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:03,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:25:04,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:04,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779449677] [2021-12-17 15:25:04,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779449677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:25:04,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:25:04,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:25:04,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422112344] [2021-12-17 15:25:04,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:25:04,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:25:04,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:04,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:25:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:25:04,088 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 15:25:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:04,157 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-12-17 15:25:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:25:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-12-17 15:25:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:04,167 INFO L225 Difference]: With dead ends: 25 [2021-12-17 15:25:04,167 INFO L226 Difference]: Without dead ends: 15 [2021-12-17 15:25:04,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:25:04,175 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:04,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:25:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-17 15:25:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-17 15:25:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 15:25:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-17 15:25:04,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-12-17 15:25:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:04,212 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-17 15:25:04,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 15:25:04,212 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-17 15:25:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 15:25:04,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:04,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:04,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:25:04,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:04,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:04,216 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-12-17 15:25:04,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:04,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772455297] [2021-12-17 15:25:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:04,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:04,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:04,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:25:04,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772455297] [2021-12-17 15:25:04,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772455297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:04,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268998189] [2021-12-17 15:25:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:04,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:04,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:04,298 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) [2021-12-17 15:25:04,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 15:25:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:04,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 15:25:04,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:25:04,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 15:25:04,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268998189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:04,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:04,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2021-12-17 15:25:04,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979383022] [2021-12-17 15:25:04,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:04,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 15:25:04,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:04,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 15:25:04,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:25:04,674 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 15:25:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:04,723 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-12-17 15:25:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 15:25:04,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2021-12-17 15:25:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:04,724 INFO L225 Difference]: With dead ends: 22 [2021-12-17 15:25:04,725 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 15:25:04,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:25:04,726 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:04,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:25:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 15:25:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 15:25:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 15:25:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-17 15:25:04,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-12-17 15:25:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:04,732 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-17 15:25:04,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 15:25:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-17 15:25:04,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 15:25:04,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:04,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:04,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:04,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:04,960 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-12-17 15:25:04,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:04,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093538093] [2021-12-17 15:25:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:04,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:05,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:05,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:05,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 15:25:05,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:05,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093538093] [2021-12-17 15:25:05,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093538093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:05,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28775311] [2021-12-17 15:25:05,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:25:05,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:05,123 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) [2021-12-17 15:25:05,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 15:25:05,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:25:05,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:05,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 15:25:05,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 15:25:05,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 15:25:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28775311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:05,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:05,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2021-12-17 15:25:05,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323059230] [2021-12-17 15:25:05,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:05,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 15:25:05,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:05,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 15:25:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:25:05,648 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 15:25:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:05,707 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-12-17 15:25:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:25:05,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2021-12-17 15:25:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:05,710 INFO L225 Difference]: With dead ends: 25 [2021-12-17 15:25:05,710 INFO L226 Difference]: Without dead ends: 21 [2021-12-17 15:25:05,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:25:05,714 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:05,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:25:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-17 15:25:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-17 15:25:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 15:25:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-17 15:25:05,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-12-17 15:25:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:05,728 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-17 15:25:05,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 15:25:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-17 15:25:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 15:25:05,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:05,730 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:05,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:05,943 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,SelfDestructingSolverStorable2 [2021-12-17 15:25:05,944 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-12-17 15:25:05,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:05,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137698953] [2021-12-17 15:25:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:05,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:05,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:06,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:06,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:06,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:25:06,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:06,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137698953] [2021-12-17 15:25:06,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137698953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:06,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488369011] [2021-12-17 15:25:06,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:25:06,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:06,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:06,105 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) [2021-12-17 15:25:06,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 15:25:06,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 15:25:06,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 15:25:06,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:25:06,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:25:06,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488369011] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:06,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:06,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 15 [2021-12-17 15:25:06,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133582491] [2021-12-17 15:25:06,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:06,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 15:25:06,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 15:25:06,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:25:06,671 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-17 15:25:06,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:06,735 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-12-17 15:25:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 15:25:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2021-12-17 15:25:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:06,737 INFO L225 Difference]: With dead ends: 28 [2021-12-17 15:25:06,742 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 15:25:06,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-17 15:25:06,746 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:06,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:25:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 15:25:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 15:25:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 15:25:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-17 15:25:06,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-12-17 15:25:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:06,756 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-17 15:25:06,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-17 15:25:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-17 15:25:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 15:25:06,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:06,759 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:06,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:06,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:06,977 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-12-17 15:25:06,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:06,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916403374] [2021-12-17 15:25:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:06,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:07,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:07,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:07,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:07,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:07,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:25:07,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:07,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916403374] [2021-12-17 15:25:07,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916403374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:07,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550530043] [2021-12-17 15:25:07,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:25:07,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:07,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:07,144 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) [2021-12-17 15:25:07,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 15:25:07,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:25:07,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:07,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 15:25:07,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:25:07,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 15:25:07,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550530043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:07,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:07,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 17 [2021-12-17 15:25:07,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019017010] [2021-12-17 15:25:07,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:07,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 15:25:07,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 15:25:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-12-17 15:25:07,934 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-17 15:25:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:08,006 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-12-17 15:25:08,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:25:08,006 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2021-12-17 15:25:08,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:08,007 INFO L225 Difference]: With dead ends: 31 [2021-12-17 15:25:08,008 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 15:25:08,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-12-17 15:25:08,009 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:08,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:25:08,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 15:25:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 15:25:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 15:25:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-17 15:25:08,014 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-12-17 15:25:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:08,015 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-17 15:25:08,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-17 15:25:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-17 15:25:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 15:25:08,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:08,016 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:08,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:08,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:08,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-12-17 15:25:08,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:08,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859344919] [2021-12-17 15:25:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:08,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:08,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:08,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:08,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:08,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:08,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 15:25:08,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:08,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859344919] [2021-12-17 15:25:08,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859344919] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:08,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150553886] [2021-12-17 15:25:08,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:25:08,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:08,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:08,432 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) [2021-12-17 15:25:08,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 15:25:08,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 15:25:08,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:08,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 15:25:08,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 15:25:08,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:25:09,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150553886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:09,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:09,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 19 [2021-12-17 15:25:09,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039575887] [2021-12-17 15:25:09,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:09,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 15:25:09,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 15:25:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-17 15:25:09,472 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-17 15:25:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:09,547 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-12-17 15:25:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 15:25:09,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2021-12-17 15:25:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:09,549 INFO L225 Difference]: With dead ends: 34 [2021-12-17 15:25:09,549 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 15:25:09,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-12-17 15:25:09,550 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:09,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 74 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:25:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 15:25:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-17 15:25:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 15:25:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-17 15:25:09,555 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-12-17 15:25:09,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:09,556 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-17 15:25:09,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-17 15:25:09,556 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-17 15:25:09,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 15:25:09,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:09,557 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:09,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:09,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:09,764 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:09,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:09,764 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-12-17 15:25:09,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:09,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634560499] [2021-12-17 15:25:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:09,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:09,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:09,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:09,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:09,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:09,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:09,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-17 15:25:09,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634560499] [2021-12-17 15:25:09,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634560499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610798222] [2021-12-17 15:25:09,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:25:09,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:09,950 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) [2021-12-17 15:25:09,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 15:25:10,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 15:25:10,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 15:25:10,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-17 15:25:10,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 15:25:11,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610798222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:11,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:11,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 21 [2021-12-17 15:25:11,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66890172] [2021-12-17 15:25:11,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:11,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 15:25:11,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:11,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 15:25:11,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-12-17 15:25:11,387 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-17 15:25:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:11,488 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-12-17 15:25:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 15:25:11,488 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2021-12-17 15:25:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:11,489 INFO L225 Difference]: With dead ends: 37 [2021-12-17 15:25:11,489 INFO L226 Difference]: Without dead ends: 33 [2021-12-17 15:25:11,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-12-17 15:25:11,491 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:11,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 69 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:25:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-17 15:25:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-17 15:25:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 15:25:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-17 15:25:11,496 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-12-17 15:25:11,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:11,496 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-17 15:25:11,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-17 15:25:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-17 15:25:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 15:25:11,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:11,498 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:11,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:11,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:11,724 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-12-17 15:25:11,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:11,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930059952] [2021-12-17 15:25:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:11,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-17 15:25:11,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:11,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930059952] [2021-12-17 15:25:11,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930059952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:11,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9932975] [2021-12-17 15:25:11,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:25:11,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:11,881 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) [2021-12-17 15:25:11,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 15:25:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 15:25:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-17 15:25:12,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 15:25:13,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9932975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:13,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:13,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 23 [2021-12-17 15:25:13,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429272684] [2021-12-17 15:25:13,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:13,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 15:25:13,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 15:25:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-12-17 15:25:13,712 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-12-17 15:25:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:13,810 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-12-17 15:25:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 15:25:13,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2021-12-17 15:25:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:13,812 INFO L225 Difference]: With dead ends: 40 [2021-12-17 15:25:13,812 INFO L226 Difference]: Without dead ends: 36 [2021-12-17 15:25:13,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2021-12-17 15:25:13,813 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:13,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 78 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:25:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-17 15:25:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-17 15:25:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 15:25:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-17 15:25:13,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-12-17 15:25:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:13,819 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-17 15:25:13,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-12-17 15:25:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-17 15:25:13,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 15:25:13,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:13,820 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:13,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:14,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:14,028 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-12-17 15:25:14,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:14,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857850910] [2021-12-17 15:25:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:14,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 15:25:14,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:14,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857850910] [2021-12-17 15:25:14,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857850910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:14,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099522969] [2021-12-17 15:25:14,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:25:14,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:14,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:14,212 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) [2021-12-17 15:25:14,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 15:25:14,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:25:14,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:14,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 15:25:14,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 15:25:14,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 15:25:16,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099522969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:16,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:16,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 25 [2021-12-17 15:25:16,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125246300] [2021-12-17 15:25:16,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:16,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 15:25:16,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:16,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 15:25:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-12-17 15:25:16,666 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-12-17 15:25:16,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:16,788 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-12-17 15:25:16,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 15:25:16,789 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2021-12-17 15:25:16,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:16,790 INFO L225 Difference]: With dead ends: 43 [2021-12-17 15:25:16,790 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 15:25:16,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=365, Invalid=757, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 15:25:16,791 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:16,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 88 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:25:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 15:25:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-17 15:25:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 15:25:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-12-17 15:25:16,802 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-12-17 15:25:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:16,803 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-12-17 15:25:16,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-12-17 15:25:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-12-17 15:25:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 15:25:16,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:16,806 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:16,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:17,011 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,SelfDestructingSolverStorable8 [2021-12-17 15:25:17,012 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-12-17 15:25:17,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947331218] [2021-12-17 15:25:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:17,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-17 15:25:17,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:17,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947331218] [2021-12-17 15:25:17,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947331218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:17,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291312459] [2021-12-17 15:25:17,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:25:17,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:17,241 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) [2021-12-17 15:25:17,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 15:25:17,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 15:25:17,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:17,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 15:25:17,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-17 15:25:17,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 15:25:20,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291312459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:20,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:20,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 27 [2021-12-17 15:25:20,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206382906] [2021-12-17 15:25:20,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:20,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 15:25:20,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:20,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 15:25:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:25:20,467 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-12-17 15:25:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:20,612 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-12-17 15:25:20,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:25:20,613 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2021-12-17 15:25:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:20,614 INFO L225 Difference]: With dead ends: 46 [2021-12-17 15:25:20,614 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 15:25:20,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=434, Invalid=898, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 15:25:20,615 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:20,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 85 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:25:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 15:25:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-17 15:25:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 15:25:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-12-17 15:25:20,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-12-17 15:25:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:20,621 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-12-17 15:25:20,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-12-17 15:25:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-12-17 15:25:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 15:25:20,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:20,622 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:20,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-17 15:25:20,835 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,SelfDestructingSolverStorable9 [2021-12-17 15:25:20,835 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-12-17 15:25:20,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:20,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713326243] [2021-12-17 15:25:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:20,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:20,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:20,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:20,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:20,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:20,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:20,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:21,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:21,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:21,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:21,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-17 15:25:21,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713326243] [2021-12-17 15:25:21,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713326243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422533736] [2021-12-17 15:25:21,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:25:21,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:21,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:21,072 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) [2021-12-17 15:25:21,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 15:25:21,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:25:21,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:21,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 15:25:21,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-17 15:25:21,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-17 15:25:24,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422533736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:24,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:24,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 29 [2021-12-17 15:25:24,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044651103] [2021-12-17 15:25:24,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:24,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 15:25:24,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:24,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 15:25:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-12-17 15:25:24,870 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-12-17 15:25:25,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:25,018 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-12-17 15:25:25,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:25:25,019 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2021-12-17 15:25:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:25,020 INFO L225 Difference]: With dead ends: 49 [2021-12-17 15:25:25,020 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 15:25:25,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=509, Invalid=1051, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 15:25:25,021 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:25,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 99 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:25:25,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 15:25:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-17 15:25:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 15:25:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-17 15:25:25,026 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-12-17 15:25:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:25,026 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-17 15:25:25,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-12-17 15:25:25,027 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-17 15:25:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 15:25:25,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:25,028 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:25,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:25,251 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,SelfDestructingSolverStorable10 [2021-12-17 15:25:25,251 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:25,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-12-17 15:25:25,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:25,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3219232] [2021-12-17 15:25:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:25,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-17 15:25:25,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:25,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3219232] [2021-12-17 15:25:25,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3219232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:25,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83224222] [2021-12-17 15:25:25,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:25:25,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:25,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:25,504 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) [2021-12-17 15:25:25,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 15:25:25,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-17 15:25:25,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 15:25:25,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-17 15:25:25,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-17 15:25:30,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83224222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:30,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:30,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 31 [2021-12-17 15:25:30,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722521636] [2021-12-17 15:25:30,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:30,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 15:25:30,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 15:25:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-12-17 15:25:30,186 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-17 15:25:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:30,351 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-12-17 15:25:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 15:25:30,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2021-12-17 15:25:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:30,353 INFO L225 Difference]: With dead ends: 52 [2021-12-17 15:25:30,353 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 15:25:30,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=590, Invalid=1216, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 15:25:30,354 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:30,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 116 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:25:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 15:25:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-17 15:25:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 15:25:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-12-17 15:25:30,358 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-12-17 15:25:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:30,359 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-12-17 15:25:30,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-17 15:25:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-12-17 15:25:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-17 15:25:30,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:30,360 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:30,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:30,567 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,SelfDestructingSolverStorable11 [2021-12-17 15:25:30,567 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-12-17 15:25:30,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:30,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130865838] [2021-12-17 15:25:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:30,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-12-17 15:25:30,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:30,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130865838] [2021-12-17 15:25:30,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130865838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:30,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634456966] [2021-12-17 15:25:30,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:25:30,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:30,872 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) [2021-12-17 15:25:30,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 15:25:31,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-17 15:25:31,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 15:25:31,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-12-17 15:25:31,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 15:25:36,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634456966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:36,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:36,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 33 [2021-12-17 15:25:36,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291843945] [2021-12-17 15:25:36,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:36,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 15:25:36,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:36,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 15:25:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 15:25:36,813 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-12-17 15:25:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:36,957 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-12-17 15:25:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 15:25:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2021-12-17 15:25:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:36,959 INFO L225 Difference]: With dead ends: 55 [2021-12-17 15:25:36,959 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 15:25:36,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 15:25:36,961 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:36,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 121 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:25:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 15:25:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-17 15:25:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:25:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-12-17 15:25:36,966 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-12-17 15:25:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:36,966 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-12-17 15:25:36,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-12-17 15:25:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-12-17 15:25:36,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-17 15:25:36,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:36,967 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:36,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:37,191 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,SelfDestructingSolverStorable12 [2021-12-17 15:25:37,191 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-12-17 15:25:37,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661270869] [2021-12-17 15:25:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:37,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-17 15:25:37,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:37,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661270869] [2021-12-17 15:25:37,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661270869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:37,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578752090] [2021-12-17 15:25:37,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:25:37,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:37,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:37,539 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) [2021-12-17 15:25:37,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 15:25:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:38,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 15:25:38,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-17 15:25:38,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-17 15:25:44,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578752090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:44,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:44,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 35 [2021-12-17 15:25:44,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664853926] [2021-12-17 15:25:44,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:44,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 15:25:44,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 15:25:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 15:25:44,867 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-12-17 15:25:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:45,007 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-12-17 15:25:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 15:25:45,008 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2021-12-17 15:25:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:45,009 INFO L225 Difference]: With dead ends: 58 [2021-12-17 15:25:45,009 INFO L226 Difference]: Without dead ends: 54 [2021-12-17 15:25:45,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=770, Invalid=1582, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 15:25:45,010 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:45,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 135 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:25:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-17 15:25:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-17 15:25:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 15:25:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-12-17 15:25:45,015 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-12-17 15:25:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:45,015 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-12-17 15:25:45,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-12-17 15:25:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-12-17 15:25:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-17 15:25:45,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:45,016 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:45,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:45,219 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,SelfDestructingSolverStorable13 [2021-12-17 15:25:45,219 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-12-17 15:25:45,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:45,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270974639] [2021-12-17 15:25:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:45,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-17 15:25:45,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:45,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270974639] [2021-12-17 15:25:45,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270974639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:45,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546159203] [2021-12-17 15:25:45,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:25:45,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:45,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:45,577 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) [2021-12-17 15:25:45,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 15:25:46,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:25:46,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 15:25:46,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-17 15:25:46,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-17 15:25:54,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546159203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:54,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:54,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 37 [2021-12-17 15:25:54,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762745091] [2021-12-17 15:25:54,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:54,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 15:25:54,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 15:25:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=974, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 15:25:54,363 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2021-12-17 15:25:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:54,552 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-12-17 15:25:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 15:25:54,552 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 94 [2021-12-17 15:25:54,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:54,553 INFO L225 Difference]: With dead ends: 61 [2021-12-17 15:25:54,553 INFO L226 Difference]: Without dead ends: 57 [2021-12-17 15:25:54,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=869, Invalid=1783, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 15:25:54,555 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:54,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 132 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:25:54,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-17 15:25:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-17 15:25:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-17 15:25:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-12-17 15:25:54,560 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-12-17 15:25:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:54,560 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-12-17 15:25:54,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2021-12-17 15:25:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-12-17 15:25:54,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-17 15:25:54,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:54,561 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:54,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:54,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:54,787 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-12-17 15:25:54,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:54,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045326115] [2021-12-17 15:25:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:54,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:54,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:54,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:54,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:54,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:54,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:54,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:54,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:54,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:54,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:55,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:55,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:55,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:55,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:55,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:55,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:55,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-12-17 15:25:55,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:55,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045326115] [2021-12-17 15:25:55,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045326115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:55,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564395547] [2021-12-17 15:25:55,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:25:55,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:55,138 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) [2021-12-17 15:25:55,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 15:25:55,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 15:25:55,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 15:25:55,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-12-17 15:25:56,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:26:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-17 15:26:05,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564395547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:26:05,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:26:05,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 39 [2021-12-17 15:26:05,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670863144] [2021-12-17 15:26:05,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:26:05,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 15:26:05,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:26:05,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 15:26:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 15:26:05,918 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2021-12-17 15:26:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:26:06,173 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-12-17 15:26:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:26:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 100 [2021-12-17 15:26:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:26:06,174 INFO L225 Difference]: With dead ends: 64 [2021-12-17 15:26:06,174 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 15:26:06,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=974, Invalid=1996, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 15:26:06,176 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 406 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:26:06,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 139 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:26:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 15:26:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-17 15:26:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-17 15:26:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-12-17 15:26:06,180 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-12-17 15:26:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:26:06,181 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-12-17 15:26:06,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2021-12-17 15:26:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-12-17 15:26:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 15:26:06,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:26:06,182 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:26:06,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 15:26:06,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 15:26:06,395 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:26:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:26:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-12-17 15:26:06,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:26:06,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644532597] [2021-12-17 15:26:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:26:06,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:26:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-12-17 15:26:06,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:26:06,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644532597] [2021-12-17 15:26:06,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644532597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:26:06,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267992412] [2021-12-17 15:26:06,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:26:06,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:26:06,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:26:06,817 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) [2021-12-17 15:26:06,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 15:26:07,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:26:07,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:26:07,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 15:26:07,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:26:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-12-17 15:26:07,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:26:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-17 15:26:19,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267992412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:26:19,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:26:19,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 41 [2021-12-17 15:26:19,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799367282] [2021-12-17 15:26:19,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:26:19,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 15:26:19,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:26:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 15:26:19,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 15:26:19,508 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2021-12-17 15:26:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:26:19,718 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-12-17 15:26:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 15:26:19,719 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 106 [2021-12-17 15:26:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:26:19,719 INFO L225 Difference]: With dead ends: 67 [2021-12-17 15:26:19,720 INFO L226 Difference]: Without dead ends: 63 [2021-12-17 15:26:19,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1085, Invalid=2221, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 15:26:19,721 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:26:19,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 136 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:26:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-17 15:26:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-17 15:26:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-17 15:26:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-12-17 15:26:19,725 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-12-17 15:26:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:26:19,726 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-12-17 15:26:19,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2021-12-17 15:26:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-12-17 15:26:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 15:26:19,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:26:19,741 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:26:19,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 15:26:19,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 15:26:19,942 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:26:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:26:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-12-17 15:26:19,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:26:19,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123847104] [2021-12-17 15:26:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:26:19,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:26:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:19,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-12-17 15:26:20,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:26:20,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123847104] [2021-12-17 15:26:20,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123847104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:26:20,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280514928] [2021-12-17 15:26:20,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:26:20,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:26:20,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:26:20,370 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) [2021-12-17 15:26:20,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 15:26:21,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-17 15:26:21,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:26:21,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 15:26:21,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:26:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-12-17 15:26:21,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:26:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-17 15:26:35,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280514928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:26:35,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:26:35,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 43 [2021-12-17 15:26:35,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774024304] [2021-12-17 15:26:35,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:26:35,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 15:26:35,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:26:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 15:26:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1325, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 15:26:35,488 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2021-12-17 15:26:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:26:35,702 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-17 15:26:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 15:26:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 112 [2021-12-17 15:26:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:26:35,703 INFO L225 Difference]: With dead ends: 70 [2021-12-17 15:26:35,703 INFO L226 Difference]: Without dead ends: 66 [2021-12-17 15:26:35,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1202, Invalid=2458, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 15:26:35,705 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:26:35,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 161 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:26:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-17 15:26:35,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-17 15:26:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-17 15:26:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-12-17 15:26:35,709 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-12-17 15:26:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:26:35,709 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-12-17 15:26:35,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2021-12-17 15:26:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-12-17 15:26:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-17 15:26:35,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:26:35,711 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:26:35,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 15:26:35,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 15:26:35,923 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:26:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:26:35,924 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-12-17 15:26:35,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:26:35,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634400835] [2021-12-17 15:26:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:26:35,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:26:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:35,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-12-17 15:26:36,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:26:36,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634400835] [2021-12-17 15:26:36,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634400835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:26:36,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679749629] [2021-12-17 15:26:36,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:26:36,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:26:36,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:26:36,416 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) [2021-12-17 15:26:36,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 15:26:37,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-17 15:26:37,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:26:37,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 15:26:37,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:26:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-12-17 15:26:37,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:26:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-17 15:26:54,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679749629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:26:54,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:26:54,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 45 [2021-12-17 15:26:54,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438667392] [2021-12-17 15:26:54,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:26:54,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 15:26:54,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:26:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 15:26:54,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1454, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 15:26:54,541 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2021-12-17 15:26:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:26:54,788 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-12-17 15:26:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 15:26:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) Word has length 118 [2021-12-17 15:26:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:26:54,789 INFO L225 Difference]: With dead ends: 73 [2021-12-17 15:26:54,790 INFO L226 Difference]: Without dead ends: 69 [2021-12-17 15:26:54,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1325, Invalid=2707, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 15:26:54,792 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:26:54,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 170 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:26:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-17 15:26:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-17 15:26:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-17 15:26:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-17 15:26:54,801 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-12-17 15:26:54,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:26:54,802 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-17 15:26:54,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2021-12-17 15:26:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-17 15:26:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-17 15:26:54,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:26:54,803 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:26:54,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 15:26:55,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:26:55,025 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:26:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:26:55,025 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-12-17 15:26:55,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:26:55,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729064298] [2021-12-17 15:26:55,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:26:55,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:26:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:26:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-12-17 15:26:55,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:26:55,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729064298] [2021-12-17 15:26:55,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729064298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:26:55,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852415224] [2021-12-17 15:26:55,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:26:55,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:26:55,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:26:55,548 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:26:55,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 15:26:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:26:57,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 15:26:57,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:26:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-12-17 15:26:57,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:27:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-17 15:27:16,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852415224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:27:16,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:27:16,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 46 [2021-12-17 15:27:16,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870908620] [2021-12-17 15:27:16,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:27:16,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 15:27:16,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:27:16,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 15:27:16,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1500, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 15:27:16,855 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2021-12-17 15:27:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:27:17,173 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-17 15:27:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 15:27:17,174 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) Word has length 124 [2021-12-17 15:27:17,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:27:17,175 INFO L225 Difference]: With dead ends: 76 [2021-12-17 15:27:17,175 INFO L226 Difference]: Without dead ends: 72 [2021-12-17 15:27:17,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 263 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1451, Invalid=2839, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 15:27:17,176 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 870 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:27:17,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 162 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:27:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-17 15:27:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-17 15:27:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-17 15:27:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-17 15:27:17,180 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-12-17 15:27:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:27:17,180 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-17 15:27:17,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2021-12-17 15:27:17,180 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-17 15:27:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-17 15:27:17,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:27:17,181 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:27:17,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 15:27:17,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:27:17,382 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:27:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:27:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-12-17 15:27:17,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:27:17,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661643273] [2021-12-17 15:27:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:27:17,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:27:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:17,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:17,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:17,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:17,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:17,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:17,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-12-17 15:27:18,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:27:18,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661643273] [2021-12-17 15:27:18,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661643273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:27:18,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111856014] [2021-12-17 15:27:18,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:27:18,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:27:18,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:27:18,884 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:27:18,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 15:27:20,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:27:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:27:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-17 15:27:20,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:27:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-12-17 15:27:21,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:27:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-12-17 15:27:23,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111856014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:27:23,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:27:23,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 45 [2021-12-17 15:27:23,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844393238] [2021-12-17 15:27:23,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:27:23,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 15:27:23,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:27:23,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 15:27:23,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 15:27:23,547 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-17 15:27:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:27:24,041 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-12-17 15:27:24,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 15:27:24,041 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) Word has length 130 [2021-12-17 15:27:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:27:24,042 INFO L225 Difference]: With dead ends: 79 [2021-12-17 15:27:24,042 INFO L226 Difference]: Without dead ends: 75 [2021-12-17 15:27:24,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 293 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 15:27:24,047 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1823 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:27:24,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1823 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 15:27:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-17 15:27:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-17 15:27:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-17 15:27:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-17 15:27:24,051 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-12-17 15:27:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:27:24,053 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-17 15:27:24,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-17 15:27:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-17 15:27:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-17 15:27:24,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:27:24,054 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:27:24,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 15:27:24,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-17 15:27:24,255 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:27:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:27:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-12-17 15:27:24,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:27:24,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004247080] [2021-12-17 15:27:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:27:24,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:27:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:27:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:27:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-12-17 15:27:24,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:27:24,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004247080] [2021-12-17 15:27:24,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004247080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:27:24,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452651967] [2021-12-17 15:27:24,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:27:24,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:27:24,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:27:24,909 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:27:24,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 15:27:26,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-17 15:27:26,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:27:26,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-17 15:27:26,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:27:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-12-17 15:27:27,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:27:27,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452651967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:27:27,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:27:27,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [26] total 28 [2021-12-17 15:27:27,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659606589] [2021-12-17 15:27:27,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:27:27,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 15:27:27,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:27:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 15:27:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2021-12-17 15:27:27,172 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-17 15:27:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:27:27,491 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-12-17 15:27:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 15:27:27,491 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) Word has length 136 [2021-12-17 15:27:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:27:27,491 INFO L225 Difference]: With dead ends: 75 [2021-12-17 15:27:27,492 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 15:27:27,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=836, Invalid=1614, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 15:27:27,493 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 4 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:27:27,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 234 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:27:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 15:27:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 15:27:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:27:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 15:27:27,494 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2021-12-17 15:27:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:27:27,494 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 15:27:27,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-17 15:27:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 15:27:27,494 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 15:27:27,496 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 15:27:27,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 15:27:27,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 15:27:27,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 15:27:27,711 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 15:27:27,711 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 15:27:27,711 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 15:27:27,711 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 15:27:27,711 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-12-17 15:27:27,711 INFO L858 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-12-17 15:27:27,711 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2021-12-17 15:27:27,715 INFO L854 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= 20 |ULTIMATE.start_main_~input~0#1|) (<= |ULTIMATE.start_main_~input~0#1| 20)) [2021-12-17 15:27:27,715 INFO L858 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-12-17 15:27:27,715 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2021-12-17 15:27:27,715 INFO L858 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2021-12-17 15:27:27,715 INFO L858 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2021-12-17 15:27:27,715 INFO L854 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-12-17 15:27:27,715 INFO L861 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2021-12-17 15:27:27,715 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-12-17 15:27:27,715 INFO L858 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-12-17 15:27:27,717 INFO L732 BasicCegarLoop]: Path program histogram: [21, 1] [2021-12-17 15:27:27,719 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 15:27:27,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 03:27:27 BoogieIcfgContainer [2021-12-17 15:27:27,726 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 15:27:27,726 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 15:27:27,726 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 15:27:27,727 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 15:27:27,727 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:25:03" (3/4) ... [2021-12-17 15:27:27,730 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 15:27:27,735 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-12-17 15:27:27,740 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-12-17 15:27:27,740 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 15:27:27,740 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 15:27:27,740 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 15:27:27,766 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 15:27:27,766 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 15:27:27,767 INFO L158 Benchmark]: Toolchain (without parser) took 144541.47ms. Allocated memory was 86.0MB in the beginning and 318.8MB in the end (delta: 232.8MB). Free memory was 52.6MB in the beginning and 101.4MB in the end (delta: -48.8MB). Peak memory consumption was 183.4MB. Max. memory is 16.1GB. [2021-12-17 15:27:27,771 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 86.0MB. Free memory was 57.0MB in the beginning and 57.0MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 15:27:27,771 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.20ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 52.3MB in the beginning and 82.2MB in the end (delta: -29.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 15:27:27,771 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.01ms. Allocated memory is still 104.9MB. Free memory was 82.2MB in the beginning and 80.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 15:27:27,771 INFO L158 Benchmark]: Boogie Preprocessor took 13.21ms. Allocated memory is still 104.9MB. Free memory was 80.6MB in the beginning and 79.9MB in the end (delta: 639.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 15:27:27,772 INFO L158 Benchmark]: RCFGBuilder took 231.29ms. Allocated memory is still 104.9MB. Free memory was 79.9MB in the beginning and 71.1MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 15:27:27,774 INFO L158 Benchmark]: TraceAbstraction took 144043.21ms. Allocated memory was 104.9MB in the beginning and 318.8MB in the end (delta: 213.9MB). Free memory was 70.7MB in the beginning and 103.5MB in the end (delta: -32.8MB). Peak memory consumption was 184.2MB. Max. memory is 16.1GB. [2021-12-17 15:27:27,774 INFO L158 Benchmark]: Witness Printer took 39.98ms. Allocated memory is still 318.8MB. Free memory was 103.5MB in the beginning and 101.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 15:27:27,780 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 86.0MB. Free memory was 57.0MB in the beginning and 57.0MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.20ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 52.3MB in the beginning and 82.2MB in the end (delta: -29.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.01ms. Allocated memory is still 104.9MB. Free memory was 82.2MB in the beginning and 80.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.21ms. Allocated memory is still 104.9MB. Free memory was 80.6MB in the beginning and 79.9MB in the end (delta: 639.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 231.29ms. Allocated memory is still 104.9MB. Free memory was 79.9MB in the beginning and 71.1MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 144043.21ms. Allocated memory was 104.9MB in the beginning and 318.8MB in the end (delta: 213.9MB). Free memory was 70.7MB in the beginning and 103.5MB in the end (delta: -32.8MB). Peak memory consumption was 184.2MB. Max. memory is 16.1GB. * Witness Printer took 39.98ms. Allocated memory is still 318.8MB. Free memory was 103.5MB in the beginning and 101.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 144.0s, OverallIterations: 22, TraceHistogramMax: 22, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.1s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2940 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2689 mSDsluCounter, 4055 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3752 mSDsCounter, 1138 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2716 IncrementalHoareTripleChecker+Invalid, 3854 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1138 mSolverCounterUnsat, 303 mSDtfsCounter, 2716 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4093 GetRequests, 3266 SyntacticMatches, 11 SemanticMatches, 816 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9045 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=21, InterpolantAutomatonStates: 361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 122.8s InterpolantComputationTime, 3202 NumberOfCodeBlocks, 3202 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 4599 ConstructedInterpolants, 0 QuantifiedInterpolants, 13935 SizeOfPredicates, 232 NumberOfNonLiveVariables, 4200 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 63 InterpolantComputations, 2 PerfectInterpolantSequences, 13406/29148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-17 15:27:27,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE