./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label45.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/eca-rers2012/Problem03_label45.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 e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:07:43,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:07:43,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:07:43,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:07:43,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:07:43,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:07:43,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:07:43,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:07:43,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:07:43,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:07:43,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:07:43,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:07:43,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:07:43,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:07:43,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:07:43,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:07:43,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:07:43,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:07:43,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:07:43,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:07:43,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:07:43,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:07:43,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:07:43,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:07:43,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:07:43,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:07:43,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:07:43,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:07:43,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:07:43,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:07:43,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:07:43,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:07:43,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:07:43,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:07:43,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:07:43,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:07:43,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:07:43,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:07:43,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:07:43,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:07:43,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:07:43,429 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:07:43,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:07:43,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:07:43,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:07:43,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:07:43,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:07:43,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:07:43,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:07:43,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:07:43,459 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:07:43,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:07:43,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:07:43,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:07:43,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:07:43,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:07:43,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:07:43,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:07:43,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:07:43,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:07:43,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:07:43,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:07:43,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:07:43,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:07:43,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:07:43,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:07:43,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:07:43,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:07:43,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:07:43,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:07:43,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:07:43,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:07:43,463 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:07:43,463 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:07:43,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:07:43,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:07:43,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af [2021-12-15 22:07:43,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:07:43,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:07:43,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:07:43,697 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:07:43,698 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:07:43,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2021-12-15 22:07:43,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28a6f1531/4bd297fcf70145eb99dabf08a1859755/FLAGee8966022 [2021-12-15 22:07:44,295 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:07:44,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2021-12-15 22:07:44,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28a6f1531/4bd297fcf70145eb99dabf08a1859755/FLAGee8966022 [2021-12-15 22:07:44,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28a6f1531/4bd297fcf70145eb99dabf08a1859755 [2021-12-15 22:07:44,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:07:44,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:07:44,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:07:44,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:07:44,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:07:44,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:07:44" (1/1) ... [2021-12-15 22:07:44,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee157a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:44, skipping insertion in model container [2021-12-15 22:07:44,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:07:44" (1/1) ... [2021-12-15 22:07:44,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:07:44,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:07:45,102 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label45.c[53653,53666] [2021-12-15 22:07:45,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:07:45,183 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:07:45,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label45.c[53653,53666] [2021-12-15 22:07:45,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:07:45,425 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:07:45,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45 WrapperNode [2021-12-15 22:07:45,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:07:45,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:07:45,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:07:45,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:07:45,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,541 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 22:07:45,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:07:45,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:07:45,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:07:45,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:07:45,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:07:45,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:07:45,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:07:45,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:07:45,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (1/1) ... [2021-12-15 22:07:45,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:07:45,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:07:45,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:07:45,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:07:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:07:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:07:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:07:45,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:07:45,788 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:07:45,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:07:47,133 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:07:47,147 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:07:47,148 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:07:47,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:07:47 BoogieIcfgContainer [2021-12-15 22:07:47,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:07:47,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:07:47,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:07:47,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:07:47,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:07:44" (1/3) ... [2021-12-15 22:07:47,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e473baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:07:47, skipping insertion in model container [2021-12-15 22:07:47,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:45" (2/3) ... [2021-12-15 22:07:47,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e473baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:07:47, skipping insertion in model container [2021-12-15 22:07:47,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:07:47" (3/3) ... [2021-12-15 22:07:47,159 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label45.c [2021-12-15 22:07:47,163 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:07:47,164 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:07:47,203 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:07:47,209 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:07:47,209 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:07:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-15 22:07:47,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:47,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:47,248 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:47,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1107694590, now seen corresponding path program 1 times [2021-12-15 22:07:47,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:47,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851313457] [2021-12-15 22:07:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:47,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:07:47,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:47,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851313457] [2021-12-15 22:07:47,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851313457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:47,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:47,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:47,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16923792] [2021-12-15 22:07:47,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:47,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:47,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:47,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:47,801 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:48,822 INFO L93 Difference]: Finished difference Result 829 states and 1478 transitions. [2021-12-15 22:07:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:48,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-12-15 22:07:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:48,843 INFO L225 Difference]: With dead ends: 829 [2021-12-15 22:07:48,843 INFO L226 Difference]: Without dead ends: 463 [2021-12-15 22:07:48,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:48,855 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 147 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:48,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 127 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:07:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-15 22:07:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2021-12-15 22:07:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6183035714285714) internal successors, (725), 448 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 725 transitions. [2021-12-15 22:07:48,936 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 725 transitions. Word has length 144 [2021-12-15 22:07:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:48,939 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 725 transitions. [2021-12-15 22:07:48,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 725 transitions. [2021-12-15 22:07:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-15 22:07:48,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:48,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:48,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:07:48,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 930993362, now seen corresponding path program 1 times [2021-12-15 22:07:48,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:48,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663621971] [2021-12-15 22:07:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:48,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:07:49,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:49,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663621971] [2021-12-15 22:07:49,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663621971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:49,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:49,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:49,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602047814] [2021-12-15 22:07:49,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:49,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:49,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:49,039 INFO L87 Difference]: Start difference. First operand 449 states and 725 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:49,723 INFO L93 Difference]: Finished difference Result 1323 states and 2147 transitions. [2021-12-15 22:07:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-15 22:07:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:49,733 INFO L225 Difference]: With dead ends: 1323 [2021-12-15 22:07:49,733 INFO L226 Difference]: Without dead ends: 876 [2021-12-15 22:07:49,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:49,735 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 267 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:49,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 132 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:07:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-12-15 22:07:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 868. [2021-12-15 22:07:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.5340253748558246) internal successors, (1330), 867 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1330 transitions. [2021-12-15 22:07:49,771 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1330 transitions. Word has length 149 [2021-12-15 22:07:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:49,771 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1330 transitions. [2021-12-15 22:07:49,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1330 transitions. [2021-12-15 22:07:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-15 22:07:49,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:49,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:49,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:07:49,774 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1297183571, now seen corresponding path program 1 times [2021-12-15 22:07:49,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:49,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517853796] [2021-12-15 22:07:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:49,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:07:49,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:49,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517853796] [2021-12-15 22:07:49,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517853796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:07:49,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301471486] [2021-12-15 22:07:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:49,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:49,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:07:49,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:07:49,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:07:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:07:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:07:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 22:07:50,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:07:50,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301471486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:50,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:07:50,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:07:50,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943756513] [2021-12-15 22:07:50,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:50,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:50,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:50,497 INFO L87 Difference]: Start difference. First operand 868 states and 1330 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:51,241 INFO L93 Difference]: Finished difference Result 2576 states and 3961 transitions. [2021-12-15 22:07:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:51,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-15 22:07:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:51,249 INFO L225 Difference]: With dead ends: 2576 [2021-12-15 22:07:51,249 INFO L226 Difference]: Without dead ends: 1710 [2021-12-15 22:07:51,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:51,255 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 99 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:51,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 176 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:07:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-12-15 22:07:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1692. [2021-12-15 22:07:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 1.5156712004730928) internal successors, (2563), 1691 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2563 transitions. [2021-12-15 22:07:51,299 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2563 transitions. Word has length 151 [2021-12-15 22:07:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:51,301 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2563 transitions. [2021-12-15 22:07:51,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:51,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2563 transitions. [2021-12-15 22:07:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-15 22:07:51,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:51,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:51,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:07:51,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:51,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:51,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:51,516 INFO L85 PathProgramCache]: Analyzing trace with hash 412120481, now seen corresponding path program 1 times [2021-12-15 22:07:51,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:51,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610732968] [2021-12-15 22:07:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:51,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:07:51,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610732968] [2021-12-15 22:07:51,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610732968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:51,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:51,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:51,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935149861] [2021-12-15 22:07:51,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:51,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:51,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:51,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:51,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:51,573 INFO L87 Difference]: Start difference. First operand 1692 states and 2563 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:52,242 INFO L93 Difference]: Finished difference Result 5047 states and 7658 transitions. [2021-12-15 22:07:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:52,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-12-15 22:07:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:52,255 INFO L225 Difference]: With dead ends: 5047 [2021-12-15 22:07:52,255 INFO L226 Difference]: Without dead ends: 3357 [2021-12-15 22:07:52,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:52,267 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:52,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 105 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:07:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-12-15 22:07:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3349. [2021-12-15 22:07:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 1.497610513739546) internal successors, (5014), 3348 states have internal predecessors, (5014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 5014 transitions. [2021-12-15 22:07:52,349 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 5014 transitions. Word has length 157 [2021-12-15 22:07:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:52,349 INFO L470 AbstractCegarLoop]: Abstraction has 3349 states and 5014 transitions. [2021-12-15 22:07:52,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 5014 transitions. [2021-12-15 22:07:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-15 22:07:52,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:52,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:52,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:07:52,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:52,358 INFO L85 PathProgramCache]: Analyzing trace with hash 31298572, now seen corresponding path program 1 times [2021-12-15 22:07:52,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:52,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682810673] [2021-12-15 22:07:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:52,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 22:07:52,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:52,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682810673] [2021-12-15 22:07:52,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682810673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:52,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:52,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:52,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909874946] [2021-12-15 22:07:52,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:52,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:52,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:52,433 INFO L87 Difference]: Start difference. First operand 3349 states and 5014 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:53,182 INFO L93 Difference]: Finished difference Result 9979 states and 14956 transitions. [2021-12-15 22:07:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:53,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-12-15 22:07:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:53,209 INFO L225 Difference]: With dead ends: 9979 [2021-12-15 22:07:53,210 INFO L226 Difference]: Without dead ends: 6632 [2021-12-15 22:07:53,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:53,217 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 233 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:53,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 149 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:07:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6632 states. [2021-12-15 22:07:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6632 to 6625. [2021-12-15 22:07:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 6624 states have (on average 1.4290458937198067) internal successors, (9466), 6624 states have internal predecessors, (9466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 9466 transitions. [2021-12-15 22:07:53,340 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 9466 transitions. Word has length 158 [2021-12-15 22:07:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:53,340 INFO L470 AbstractCegarLoop]: Abstraction has 6625 states and 9466 transitions. [2021-12-15 22:07:53,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 9466 transitions. [2021-12-15 22:07:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-15 22:07:53,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:53,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:53,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:07:53,350 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash -746804845, now seen corresponding path program 1 times [2021-12-15 22:07:53,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:53,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204247889] [2021-12-15 22:07:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:53,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:07:53,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204247889] [2021-12-15 22:07:53,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204247889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:53,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:53,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:53,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489390657] [2021-12-15 22:07:53,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:53,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:53,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:53,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:53,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:53,411 INFO L87 Difference]: Start difference. First operand 6625 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:54,153 INFO L93 Difference]: Finished difference Result 16536 states and 23558 transitions. [2021-12-15 22:07:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-15 22:07:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:54,183 INFO L225 Difference]: With dead ends: 16536 [2021-12-15 22:07:54,183 INFO L226 Difference]: Without dead ends: 9913 [2021-12-15 22:07:54,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:54,191 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 217 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:54,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:07:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9913 states. [2021-12-15 22:07:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9913 to 9903. [2021-12-15 22:07:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9903 states, 9902 states have (on average 1.4088063017572208) internal successors, (13950), 9902 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9903 states to 9903 states and 13950 transitions. [2021-12-15 22:07:54,353 INFO L78 Accepts]: Start accepts. Automaton has 9903 states and 13950 transitions. Word has length 161 [2021-12-15 22:07:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:54,353 INFO L470 AbstractCegarLoop]: Abstraction has 9903 states and 13950 transitions. [2021-12-15 22:07:54,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 9903 states and 13950 transitions. [2021-12-15 22:07:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-15 22:07:54,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:54,365 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:54,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:07:54,365 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:54,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1646465925, now seen corresponding path program 1 times [2021-12-15 22:07:54,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:54,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167576991] [2021-12-15 22:07:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:54,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 22:07:54,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:54,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167576991] [2021-12-15 22:07:54,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167576991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:54,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:54,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:54,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164452449] [2021-12-15 22:07:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:54,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:54,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:54,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:54,410 INFO L87 Difference]: Start difference. First operand 9903 states and 13950 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:55,208 INFO L93 Difference]: Finished difference Result 28935 states and 40804 transitions. [2021-12-15 22:07:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-12-15 22:07:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:55,251 INFO L225 Difference]: With dead ends: 28935 [2021-12-15 22:07:55,251 INFO L226 Difference]: Without dead ends: 19034 [2021-12-15 22:07:55,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:55,270 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:55,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 194 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:07:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19034 states. [2021-12-15 22:07:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19034 to 15989. [2021-12-15 22:07:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15989 states, 15988 states have (on average 1.2964098073555166) internal successors, (20727), 15988 states have internal predecessors, (20727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15989 states to 15989 states and 20727 transitions. [2021-12-15 22:07:55,597 INFO L78 Accepts]: Start accepts. Automaton has 15989 states and 20727 transitions. Word has length 163 [2021-12-15 22:07:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:55,597 INFO L470 AbstractCegarLoop]: Abstraction has 15989 states and 20727 transitions. [2021-12-15 22:07:55,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 15989 states and 20727 transitions. [2021-12-15 22:07:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-15 22:07:55,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:55,615 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:55,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:07:55,616 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash 389848661, now seen corresponding path program 1 times [2021-12-15 22:07:55,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:55,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161686087] [2021-12-15 22:07:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:55,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 22:07:55,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161686087] [2021-12-15 22:07:55,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161686087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:55,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:55,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:07:55,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463203229] [2021-12-15 22:07:55,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:55,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:55,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:55,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:55,671 INFO L87 Difference]: Start difference. First operand 15989 states and 20727 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:56,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:56,516 INFO L93 Difference]: Finished difference Result 35450 states and 46186 transitions. [2021-12-15 22:07:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-12-15 22:07:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:56,558 INFO L225 Difference]: With dead ends: 35450 [2021-12-15 22:07:56,558 INFO L226 Difference]: Without dead ends: 19463 [2021-12-15 22:07:56,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:56,581 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 222 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:56,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 370 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:07:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19463 states. [2021-12-15 22:07:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19463 to 19457. [2021-12-15 22:07:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19457 states, 19456 states have (on average 1.2723581414473684) internal successors, (24755), 19456 states have internal predecessors, (24755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19457 states to 19457 states and 24755 transitions. [2021-12-15 22:07:57,001 INFO L78 Accepts]: Start accepts. Automaton has 19457 states and 24755 transitions. Word has length 172 [2021-12-15 22:07:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:57,001 INFO L470 AbstractCegarLoop]: Abstraction has 19457 states and 24755 transitions. [2021-12-15 22:07:57,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 19457 states and 24755 transitions. [2021-12-15 22:07:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 22:07:57,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:57,025 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:57,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:07:57,025 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1622857335, now seen corresponding path program 1 times [2021-12-15 22:07:57,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:57,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104331412] [2021-12-15 22:07:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:57,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 22:07:57,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:57,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104331412] [2021-12-15 22:07:57,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104331412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:57,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:57,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:07:57,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399114479] [2021-12-15 22:07:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:57,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:07:57,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:07:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:07:57,100 INFO L87 Difference]: Start difference. First operand 19457 states and 24755 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:57,994 INFO L93 Difference]: Finished difference Result 38472 states and 49037 transitions. [2021-12-15 22:07:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:07:57,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-12-15 22:07:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:58,037 INFO L225 Difference]: With dead ends: 38472 [2021-12-15 22:07:58,038 INFO L226 Difference]: Without dead ends: 19017 [2021-12-15 22:07:58,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:07:58,063 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 472 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:58,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 44 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:07:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19017 states. [2021-12-15 22:07:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19017 to 19003. [2021-12-15 22:07:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19003 states, 19002 states have (on average 1.2341858751710346) internal successors, (23452), 19002 states have internal predecessors, (23452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19003 states to 19003 states and 23452 transitions. [2021-12-15 22:07:58,364 INFO L78 Accepts]: Start accepts. Automaton has 19003 states and 23452 transitions. Word has length 176 [2021-12-15 22:07:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:58,365 INFO L470 AbstractCegarLoop]: Abstraction has 19003 states and 23452 transitions. [2021-12-15 22:07:58,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 19003 states and 23452 transitions. [2021-12-15 22:07:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-15 22:07:58,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:58,386 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:58,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:07:58,386 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2123624759, now seen corresponding path program 1 times [2021-12-15 22:07:58,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947981874] [2021-12-15 22:07:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:58,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 22:07:58,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:58,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947981874] [2021-12-15 22:07:58,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947981874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:07:58,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985090368] [2021-12-15 22:07:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:58,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:58,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:07:58,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:07:58,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:07:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:58,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:07:58,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:07:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 22:07:58,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:07:58,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985090368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:58,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:07:58,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 22:07:58,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601778018] [2021-12-15 22:07:58,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:58,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:58,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:58,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:58,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:58,850 INFO L87 Difference]: Start difference. First operand 19003 states and 23452 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:59,668 INFO L93 Difference]: Finished difference Result 42256 states and 52987 transitions. [2021-12-15 22:07:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-12-15 22:07:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:59,708 INFO L225 Difference]: With dead ends: 42256 [2021-12-15 22:07:59,708 INFO L226 Difference]: Without dead ends: 23255 [2021-12-15 22:07:59,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:59,730 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 210 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:59,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 367 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:07:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23255 states. [2021-12-15 22:08:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23255 to 20207. [2021-12-15 22:08:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20207 states, 20206 states have (on average 1.2064733247550232) internal successors, (24378), 20206 states have internal predecessors, (24378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20207 states to 20207 states and 24378 transitions. [2021-12-15 22:08:00,270 INFO L78 Accepts]: Start accepts. Automaton has 20207 states and 24378 transitions. Word has length 185 [2021-12-15 22:08:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:00,270 INFO L470 AbstractCegarLoop]: Abstraction has 20207 states and 24378 transitions. [2021-12-15 22:08:00,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 20207 states and 24378 transitions. [2021-12-15 22:08:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-15 22:08:00,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:00,285 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:00,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:00,495 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,SelfDestructingSolverStorable9 [2021-12-15 22:08:00,496 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1261521695, now seen corresponding path program 1 times [2021-12-15 22:08:00,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:00,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154629245] [2021-12-15 22:08:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:00,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 58 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:08:00,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:00,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154629245] [2021-12-15 22:08:00,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154629245] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:00,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313008616] [2021-12-15 22:08:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:00,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:00,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:00,581 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:00,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 22:08:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:00,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 22:08:01,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:01,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313008616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:01,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:01,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:08:01,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182618987] [2021-12-15 22:08:01,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:01,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:01,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:01,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:01,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:01,101 INFO L87 Difference]: Start difference. First operand 20207 states and 24378 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:01,883 INFO L93 Difference]: Finished difference Result 50599 states and 61352 transitions. [2021-12-15 22:08:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:01,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-15 22:08:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:01,930 INFO L225 Difference]: With dead ends: 50599 [2021-12-15 22:08:01,931 INFO L226 Difference]: Without dead ends: 30394 [2021-12-15 22:08:01,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:01,954 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 214 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:01,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 138 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30394 states. [2021-12-15 22:08:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30394 to 30392. [2021-12-15 22:08:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30392 states, 30391 states have (on average 1.1945970846632226) internal successors, (36305), 30391 states have internal predecessors, (36305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30392 states to 30392 states and 36305 transitions. [2021-12-15 22:08:02,489 INFO L78 Accepts]: Start accepts. Automaton has 30392 states and 36305 transitions. Word has length 197 [2021-12-15 22:08:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:02,489 INFO L470 AbstractCegarLoop]: Abstraction has 30392 states and 36305 transitions. [2021-12-15 22:08:02,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 30392 states and 36305 transitions. [2021-12-15 22:08:02,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-15 22:08:02,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:02,519 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:02,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:02,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:02,736 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:02,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1690985565, now seen corresponding path program 1 times [2021-12-15 22:08:02,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:02,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350881075] [2021-12-15 22:08:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:02,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 22:08:02,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:02,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350881075] [2021-12-15 22:08:02,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350881075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809441166] [2021-12-15 22:08:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:02,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:02,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:02,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:02,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 22:08:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:02,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 22:08:03,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:03,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809441166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:03,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:03,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:03,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619416389] [2021-12-15 22:08:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:03,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:03,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:03,285 INFO L87 Difference]: Start difference. First operand 30392 states and 36305 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:04,127 INFO L93 Difference]: Finished difference Result 60786 states and 72615 transitions. [2021-12-15 22:08:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2021-12-15 22:08:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:04,171 INFO L225 Difference]: With dead ends: 60786 [2021-12-15 22:08:04,171 INFO L226 Difference]: Without dead ends: 30396 [2021-12-15 22:08:04,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:04,200 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 255 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:04,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30396 states. [2021-12-15 22:08:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30396 to 28971. [2021-12-15 22:08:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28971 states, 28970 states have (on average 1.1739385571280636) internal successors, (34009), 28970 states have internal predecessors, (34009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28971 states to 28971 states and 34009 transitions. [2021-12-15 22:08:04,650 INFO L78 Accepts]: Start accepts. Automaton has 28971 states and 34009 transitions. Word has length 262 [2021-12-15 22:08:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:04,650 INFO L470 AbstractCegarLoop]: Abstraction has 28971 states and 34009 transitions. [2021-12-15 22:08:04,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 28971 states and 34009 transitions. [2021-12-15 22:08:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-15 22:08:04,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:04,668 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:04,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:04,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:04,890 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 59935391, now seen corresponding path program 1 times [2021-12-15 22:08:04,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:04,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542872913] [2021-12-15 22:08:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:04,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 99 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-15 22:08:05,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:05,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542872913] [2021-12-15 22:08:05,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542872913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:05,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798642783] [2021-12-15 22:08:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:05,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:05,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:05,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 22:08:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:05,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:05,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 22:08:05,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:05,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798642783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:05,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:05,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:05,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161674778] [2021-12-15 22:08:05,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:05,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:05,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:05,520 INFO L87 Difference]: Start difference. First operand 28971 states and 34009 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:06,194 INFO L93 Difference]: Finished difference Result 53632 states and 62743 transitions. [2021-12-15 22:08:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:06,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2021-12-15 22:08:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:06,231 INFO L225 Difference]: With dead ends: 53632 [2021-12-15 22:08:06,231 INFO L226 Difference]: Without dead ends: 24663 [2021-12-15 22:08:06,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:06,254 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 188 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:06,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 327 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24663 states. [2021-12-15 22:08:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24663 to 24662. [2021-12-15 22:08:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24662 states, 24661 states have (on average 1.1327196788451401) internal successors, (27934), 24661 states have internal predecessors, (27934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:06,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24662 states to 24662 states and 27934 transitions. [2021-12-15 22:08:06,633 INFO L78 Accepts]: Start accepts. Automaton has 24662 states and 27934 transitions. Word has length 274 [2021-12-15 22:08:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:06,634 INFO L470 AbstractCegarLoop]: Abstraction has 24662 states and 27934 transitions. [2021-12-15 22:08:06,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:06,634 INFO L276 IsEmpty]: Start isEmpty. Operand 24662 states and 27934 transitions. [2021-12-15 22:08:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-15 22:08:06,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:06,652 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:06,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:06,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 22:08:06,868 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:06,868 INFO L85 PathProgramCache]: Analyzing trace with hash -836795370, now seen corresponding path program 1 times [2021-12-15 22:08:06,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:06,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85772094] [2021-12-15 22:08:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:06,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 139 proven. 6 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-12-15 22:08:06,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85772094] [2021-12-15 22:08:06,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85772094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851205243] [2021-12-15 22:08:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:06,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:06,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:06,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 22:08:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:07,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-15 22:08:07,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:07,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851205243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:07,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:07,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:07,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522331666] [2021-12-15 22:08:07,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:07,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:07,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:07,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:07,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:07,551 INFO L87 Difference]: Start difference. First operand 24662 states and 27934 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:08,334 INFO L93 Difference]: Finished difference Result 59470 states and 67270 transitions. [2021-12-15 22:08:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 308 [2021-12-15 22:08:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:08,373 INFO L225 Difference]: With dead ends: 59470 [2021-12-15 22:08:08,373 INFO L226 Difference]: Without dead ends: 34810 [2021-12-15 22:08:08,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:08,393 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 204 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:08,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 339 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34810 states. [2021-12-15 22:08:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34810 to 24437. [2021-12-15 22:08:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24437 states, 24436 states have (on average 1.1088148633164183) internal successors, (27095), 24436 states have internal predecessors, (27095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24437 states to 24437 states and 27095 transitions. [2021-12-15 22:08:08,669 INFO L78 Accepts]: Start accepts. Automaton has 24437 states and 27095 transitions. Word has length 308 [2021-12-15 22:08:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:08,669 INFO L470 AbstractCegarLoop]: Abstraction has 24437 states and 27095 transitions. [2021-12-15 22:08:08,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:08,670 INFO L276 IsEmpty]: Start isEmpty. Operand 24437 states and 27095 transitions. [2021-12-15 22:08:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-15 22:08:08,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:08,694 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:08,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:08,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:08,895 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:08,895 INFO L85 PathProgramCache]: Analyzing trace with hash 989884502, now seen corresponding path program 1 times [2021-12-15 22:08:08,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:08,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035513659] [2021-12-15 22:08:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:08,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 311 proven. 6 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-15 22:08:09,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035513659] [2021-12-15 22:08:09,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035513659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:09,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095168713] [2021-12-15 22:08:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:09,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:09,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:09,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:09,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 22:08:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:09,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 22:08:09,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:09,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095168713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:09,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:09,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:08:09,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288323091] [2021-12-15 22:08:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:09,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:09,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:09,849 INFO L87 Difference]: Start difference. First operand 24437 states and 27095 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:10,194 INFO L93 Difference]: Finished difference Result 73099 states and 81062 transitions. [2021-12-15 22:08:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:10,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 434 [2021-12-15 22:08:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:10,240 INFO L225 Difference]: With dead ends: 73099 [2021-12-15 22:08:10,241 INFO L226 Difference]: Without dead ends: 48664 [2021-12-15 22:08:10,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:10,262 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 211 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:10,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 525 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 22:08:10,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48664 states. [2021-12-15 22:08:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48664 to 47030. [2021-12-15 22:08:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47030 states, 47029 states have (on average 1.104701354483404) internal successors, (51953), 47029 states have internal predecessors, (51953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47030 states to 47030 states and 51953 transitions. [2021-12-15 22:08:10,936 INFO L78 Accepts]: Start accepts. Automaton has 47030 states and 51953 transitions. Word has length 434 [2021-12-15 22:08:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:10,937 INFO L470 AbstractCegarLoop]: Abstraction has 47030 states and 51953 transitions. [2021-12-15 22:08:10,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 47030 states and 51953 transitions. [2021-12-15 22:08:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-15 22:08:10,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:10,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:10,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 22:08:11,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:11,187 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1911495861, now seen corresponding path program 1 times [2021-12-15 22:08:11,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:11,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900072580] [2021-12-15 22:08:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:11,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 362 proven. 18 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-15 22:08:11,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:11,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900072580] [2021-12-15 22:08:11,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900072580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:11,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086342632] [2021-12-15 22:08:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:11,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:11,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:11,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:11,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 22:08:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:11,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:11,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 368 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-15 22:08:12,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:12,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086342632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:12,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:12,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 22:08:12,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808191392] [2021-12-15 22:08:12,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:12,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:12,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:12,266 INFO L87 Difference]: Start difference. First operand 47030 states and 51953 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:12,768 INFO L93 Difference]: Finished difference Result 129469 states and 142930 transitions. [2021-12-15 22:08:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 434 [2021-12-15 22:08:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:12,867 INFO L225 Difference]: With dead ends: 129469 [2021-12-15 22:08:12,867 INFO L226 Difference]: Without dead ends: 82441 [2021-12-15 22:08:12,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:12,899 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 322 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:12,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 564 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 22:08:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82441 states. [2021-12-15 22:08:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82441 to 82439. [2021-12-15 22:08:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82439 states, 82438 states have (on average 1.1022101458065454) internal successors, (90864), 82438 states have internal predecessors, (90864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82439 states to 82439 states and 90864 transitions. [2021-12-15 22:08:14,023 INFO L78 Accepts]: Start accepts. Automaton has 82439 states and 90864 transitions. Word has length 434 [2021-12-15 22:08:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:14,024 INFO L470 AbstractCegarLoop]: Abstraction has 82439 states and 90864 transitions. [2021-12-15 22:08:14,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 82439 states and 90864 transitions. [2021-12-15 22:08:14,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-12-15 22:08:14,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:14,208 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:14,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:14,408 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,SelfDestructingSolverStorable15 [2021-12-15 22:08:14,409 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1297717386, now seen corresponding path program 1 times [2021-12-15 22:08:14,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:14,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284968335] [2021-12-15 22:08:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:14,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-12-15 22:08:14,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:14,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284968335] [2021-12-15 22:08:14,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284968335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:14,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:14,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:08:14,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296975626] [2021-12-15 22:08:14,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:14,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:08:14,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:08:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:14,604 INFO L87 Difference]: Start difference. First operand 82439 states and 90864 transitions. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:16,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:16,027 INFO L93 Difference]: Finished difference Result 229994 states and 253393 transitions. [2021-12-15 22:08:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:08:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2021-12-15 22:08:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:16,215 INFO L225 Difference]: With dead ends: 229994 [2021-12-15 22:08:16,215 INFO L226 Difference]: Without dead ends: 147557 [2021-12-15 22:08:16,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:16,250 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 617 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:16,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 48 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:08:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147557 states. [2021-12-15 22:08:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147557 to 145923. [2021-12-15 22:08:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145923 states, 145922 states have (on average 1.1019585806115595) internal successors, (160800), 145922 states have internal predecessors, (160800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145923 states to 145923 states and 160800 transitions. [2021-12-15 22:08:18,491 INFO L78 Accepts]: Start accepts. Automaton has 145923 states and 160800 transitions. Word has length 455 [2021-12-15 22:08:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:18,492 INFO L470 AbstractCegarLoop]: Abstraction has 145923 states and 160800 transitions. [2021-12-15 22:08:18,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 145923 states and 160800 transitions. [2021-12-15 22:08:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-12-15 22:08:18,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:18,587 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:18,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:08:18,587 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2004461957, now seen corresponding path program 1 times [2021-12-15 22:08:18,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:18,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835493964] [2021-12-15 22:08:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:18,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 217 proven. 6 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-12-15 22:08:18,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:18,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835493964] [2021-12-15 22:08:18,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835493964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:18,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234771312] [2021-12-15 22:08:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:18,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:18,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:18,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 22:08:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:18,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-12-15 22:08:19,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:19,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234771312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:19,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:19,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:19,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38525445] [2021-12-15 22:08:19,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:19,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:19,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:19,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:19,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:19,545 INFO L87 Difference]: Start difference. First operand 145923 states and 160800 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:21,131 INFO L93 Difference]: Finished difference Result 398168 states and 438854 transitions. [2021-12-15 22:08:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:21,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 462 [2021-12-15 22:08:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:21,530 INFO L225 Difference]: With dead ends: 398168 [2021-12-15 22:08:21,531 INFO L226 Difference]: Without dead ends: 252247 [2021-12-15 22:08:21,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:21,584 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 286 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:21,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 806 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 22:08:21,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252247 states. [2021-12-15 22:08:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252247 to 252226. [2021-12-15 22:08:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252226 states, 252225 states have (on average 1.0930914857765883) internal successors, (275705), 252225 states have internal predecessors, (275705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252226 states to 252226 states and 275705 transitions. [2021-12-15 22:08:25,220 INFO L78 Accepts]: Start accepts. Automaton has 252226 states and 275705 transitions. Word has length 462 [2021-12-15 22:08:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:25,221 INFO L470 AbstractCegarLoop]: Abstraction has 252226 states and 275705 transitions. [2021-12-15 22:08:25,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 252226 states and 275705 transitions. [2021-12-15 22:08:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-12-15 22:08:25,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:25,338 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:25,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-15 22:08:25,538 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,SelfDestructingSolverStorable17 [2021-12-15 22:08:25,539 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1952337020, now seen corresponding path program 1 times [2021-12-15 22:08:25,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:25,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696829541] [2021-12-15 22:08:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:25,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 345 proven. 190 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-15 22:08:26,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:26,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696829541] [2021-12-15 22:08:26,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696829541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:26,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419978716] [2021-12-15 22:08:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:26,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:26,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:26,336 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) [2021-12-15 22:08:26,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 22:08:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 22:08:27,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:27,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419978716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:27,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:27,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:27,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154374384] [2021-12-15 22:08:27,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:27,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:27,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:27,143 INFO L87 Difference]: Start difference. First operand 252226 states and 275705 transitions. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:29,065 INFO L93 Difference]: Finished difference Result 535166 states and 584118 transitions. [2021-12-15 22:08:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 490 [2021-12-15 22:08:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:29,898 INFO L225 Difference]: With dead ends: 535166 [2021-12-15 22:08:29,898 INFO L226 Difference]: Without dead ends: 282942 [2021-12-15 22:08:29,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:29,970 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 115 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:29,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 352 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282942 states. [2021-12-15 22:08:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282942 to 274694. [2021-12-15 22:08:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274694 states, 274693 states have (on average 1.0842467773113986) internal successors, (297835), 274693 states have internal predecessors, (297835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274694 states to 274694 states and 297835 transitions. [2021-12-15 22:08:34,435 INFO L78 Accepts]: Start accepts. Automaton has 274694 states and 297835 transitions. Word has length 490 [2021-12-15 22:08:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:34,436 INFO L470 AbstractCegarLoop]: Abstraction has 274694 states and 297835 transitions. [2021-12-15 22:08:34,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 274694 states and 297835 transitions. [2021-12-15 22:08:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-12-15 22:08:34,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:34,636 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:34,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:34,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:34,842 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1820686194, now seen corresponding path program 1 times [2021-12-15 22:08:34,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:34,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217469749] [2021-12-15 22:08:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:34,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 590 proven. 154 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-15 22:08:35,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:35,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217469749] [2021-12-15 22:08:35,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217469749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:35,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196875996] [2021-12-15 22:08:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:35,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:35,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:35,293 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) [2021-12-15 22:08:35,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 22:08:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:35,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 22:08:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 744 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-15 22:08:36,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:36,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196875996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:36,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:36,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-15 22:08:36,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432679699] [2021-12-15 22:08:36,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:36,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:08:36,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:08:36,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:08:36,563 INFO L87 Difference]: Start difference. First operand 274694 states and 297835 transitions. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)