./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9db88713350d7306821dd75614e70e6b858505d66168ef8348e173e7f0890ab2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:09:29,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:09:29,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:09:29,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:09:29,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:09:29,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:09:29,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:09:29,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:09:29,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:09:29,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:09:29,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:09:29,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:09:29,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:09:29,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:09:29,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:09:29,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:09:29,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:09:29,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:09:29,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:09:29,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:09:29,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:09:29,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:09:29,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:09:29,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:09:29,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:09:29,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:09:29,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:09:29,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:09:29,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:09:29,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:09:29,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:09:29,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:09:29,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:09:29,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:09:29,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:09:29,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:09:29,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:09:29,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:09:29,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:09:29,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:09:29,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:09:29,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:09:29,419 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:09:29,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:09:29,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:09:29,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:09:29,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:09:29,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:09:29,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:09:29,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:09:29,422 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:09:29,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:09:29,423 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:09:29,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:09:29,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:09:29,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:09:29,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:09:29,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:09:29,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:09:29,424 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:09:29,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:09:29,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:09:29,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:09:29,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:09:29,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:09:29,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:09:29,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:29,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:09:29,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:09:29,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:09:29,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:09:29,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:09:29,426 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:09:29,426 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:09:29,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:09:29,427 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db88713350d7306821dd75614e70e6b858505d66168ef8348e173e7f0890ab2 [2021-12-28 01:09:29,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:09:29,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:09:29,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:09:29,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:09:29,719 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:09:29,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2021-12-28 01:09:29,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9dd66e83/001951e64be4482ab6ccbcaf76c69df2/FLAG2f9ee729e [2021-12-28 01:09:30,171 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:09:30,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2021-12-28 01:09:30,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9dd66e83/001951e64be4482ab6ccbcaf76c69df2/FLAG2f9ee729e [2021-12-28 01:09:30,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9dd66e83/001951e64be4482ab6ccbcaf76c69df2 [2021-12-28 01:09:30,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:09:30,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:09:30,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:30,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:09:30,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:09:30,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52591f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30, skipping insertion in model container [2021-12-28 01:09:30,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:09:30,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:09:30,757 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c[9529,9542] [2021-12-28 01:09:30,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:30,765 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:09:30,840 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c[9529,9542] [2021-12-28 01:09:30,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:30,851 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:09:30,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30 WrapperNode [2021-12-28 01:09:30,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:30,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:30,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:09:30,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:09:30,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,914 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 320 [2021-12-28 01:09:30,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:30,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:09:30,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:09:30,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:09:30,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:09:30,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:09:30,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:09:30,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:09:30,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (1/1) ... [2021-12-28 01:09:30,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:31,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:09:31,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:09:31,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:09:31,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:09:31,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:09:31,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:09:31,128 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:09:31,131 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:09:31,457 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:09:31,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:09:31,462 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:09:31,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:31 BoogieIcfgContainer [2021-12-28 01:09:31,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:09:31,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:09:31,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:09:31,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:09:31,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:09:30" (1/3) ... [2021-12-28 01:09:31,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f913f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:31, skipping insertion in model container [2021-12-28 01:09:31,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:30" (2/3) ... [2021-12-28 01:09:31,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f913f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:31, skipping insertion in model container [2021-12-28 01:09:31,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:31" (3/3) ... [2021-12-28 01:09:31,469 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2021-12-28 01:09:31,472 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:09:31,473 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:09:31,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:09:31,512 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:09:31,512 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:09:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 100 states have (on average 1.69) internal successors, (169), 101 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 01:09:31,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:31,546 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] [2021-12-28 01:09:31,546 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:31,553 INFO L85 PathProgramCache]: Analyzing trace with hash 773042370, now seen corresponding path program 1 times [2021-12-28 01:09:31,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:31,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920237372] [2021-12-28 01:09:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:31,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:31,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:31,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920237372] [2021-12-28 01:09:31,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920237372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:31,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:31,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:09:31,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4052269] [2021-12-28 01:09:31,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:31,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:09:31,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:09:31,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:09:31,776 INFO L87 Difference]: Start difference. First operand has 102 states, 100 states have (on average 1.69) internal successors, (169), 101 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:31,803 INFO L93 Difference]: Finished difference Result 171 states and 281 transitions. [2021-12-28 01:09:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:09:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-28 01:09:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:31,811 INFO L225 Difference]: With dead ends: 171 [2021-12-28 01:09:31,811 INFO L226 Difference]: Without dead ends: 98 [2021-12-28 01:09:31,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:09:31,820 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:31,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-28 01:09:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-28 01:09:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.6701030927835052) internal successors, (162), 97 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2021-12-28 01:09:31,860 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 30 [2021-12-28 01:09:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:31,861 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2021-12-28 01:09:31,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2021-12-28 01:09:31,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 01:09:31,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:31,864 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] [2021-12-28 01:09:31,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:09:31,865 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash 913590980, now seen corresponding path program 1 times [2021-12-28 01:09:31,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:31,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748027014] [2021-12-28 01:09:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:31,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:31,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:31,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748027014] [2021-12-28 01:09:31,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748027014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:31,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:31,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:31,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635870063] [2021-12-28 01:09:31,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:31,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:31,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:31,962 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,028 INFO L93 Difference]: Finished difference Result 170 states and 274 transitions. [2021-12-28 01:09:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:32,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-28 01:09:32,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,029 INFO L225 Difference]: With dead ends: 170 [2021-12-28 01:09:32,029 INFO L226 Difference]: Without dead ends: 98 [2021-12-28 01:09:32,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:32,031 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 3 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 613 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-28 01:09:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-28 01:09:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.422680412371134) internal successors, (138), 97 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 138 transitions. [2021-12-28 01:09:32,036 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 138 transitions. Word has length 30 [2021-12-28 01:09:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,036 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 138 transitions. [2021-12-28 01:09:32,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 138 transitions. [2021-12-28 01:09:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 01:09:32,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,037 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] [2021-12-28 01:09:32,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:09:32,038 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1508952555, now seen corresponding path program 1 times [2021-12-28 01:09:32,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266441993] [2021-12-28 01:09:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266441993] [2021-12-28 01:09:32,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266441993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:32,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570002379] [2021-12-28 01:09:32,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:32,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,110 INFO L87 Difference]: Start difference. First operand 98 states and 138 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,148 INFO L93 Difference]: Finished difference Result 222 states and 334 transitions. [2021-12-28 01:09:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:32,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-28 01:09:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,153 INFO L225 Difference]: With dead ends: 222 [2021-12-28 01:09:32,153 INFO L226 Difference]: Without dead ends: 154 [2021-12-28 01:09:32,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,154 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 91 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 299 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-28 01:09:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-12-28 01:09:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4834437086092715) internal successors, (224), 151 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 224 transitions. [2021-12-28 01:09:32,162 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 224 transitions. Word has length 53 [2021-12-28 01:09:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,162 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 224 transitions. [2021-12-28 01:09:32,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 224 transitions. [2021-12-28 01:09:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-28 01:09:32,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,164 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] [2021-12-28 01:09:32,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:09:32,164 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1759991574, now seen corresponding path program 1 times [2021-12-28 01:09:32,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755693806] [2021-12-28 01:09:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755693806] [2021-12-28 01:09:32,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755693806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:32,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722591166] [2021-12-28 01:09:32,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:32,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,262 INFO L87 Difference]: Start difference. First operand 152 states and 224 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,288 INFO L93 Difference]: Finished difference Result 372 states and 572 transitions. [2021-12-28 01:09:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:32,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-28 01:09:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,293 INFO L225 Difference]: With dead ends: 372 [2021-12-28 01:09:32,293 INFO L226 Difference]: Without dead ends: 250 [2021-12-28 01:09:32,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,296 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 86 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 290 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-28 01:09:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2021-12-28 01:09:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5182186234817814) internal successors, (375), 247 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 375 transitions. [2021-12-28 01:09:32,317 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 375 transitions. Word has length 54 [2021-12-28 01:09:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,318 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 375 transitions. [2021-12-28 01:09:32,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 375 transitions. [2021-12-28 01:09:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-28 01:09:32,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,322 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] [2021-12-28 01:09:32,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:09:32,322 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1078196827, now seen corresponding path program 1 times [2021-12-28 01:09:32,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855929192] [2021-12-28 01:09:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855929192] [2021-12-28 01:09:32,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855929192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:32,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832412554] [2021-12-28 01:09:32,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:32,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,405 INFO L87 Difference]: Start difference. First operand 248 states and 375 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,424 INFO L93 Difference]: Finished difference Result 636 states and 985 transitions. [2021-12-28 01:09:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:32,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-28 01:09:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,426 INFO L225 Difference]: With dead ends: 636 [2021-12-28 01:09:32,426 INFO L226 Difference]: Without dead ends: 418 [2021-12-28 01:09:32,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,428 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 81 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 281 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-28 01:09:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2021-12-28 01:09:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.5301204819277108) internal successors, (635), 415 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 635 transitions. [2021-12-28 01:09:32,446 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 635 transitions. Word has length 55 [2021-12-28 01:09:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,446 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 635 transitions. [2021-12-28 01:09:32,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 635 transitions. [2021-12-28 01:09:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 01:09:32,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,447 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] [2021-12-28 01:09:32,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:09:32,448 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1363611750, now seen corresponding path program 1 times [2021-12-28 01:09:32,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056415600] [2021-12-28 01:09:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056415600] [2021-12-28 01:09:32,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056415600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:32,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122103016] [2021-12-28 01:09:32,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:32,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:32,516 INFO L87 Difference]: Start difference. First operand 416 states and 635 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,652 INFO L93 Difference]: Finished difference Result 2346 states and 3660 transitions. [2021-12-28 01:09:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:32,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-28 01:09:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,659 INFO L225 Difference]: With dead ends: 2346 [2021-12-28 01:09:32,660 INFO L226 Difference]: Without dead ends: 1960 [2021-12-28 01:09:32,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:09:32,662 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 780 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 1152 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-12-28 01:09:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 800. [2021-12-28 01:09:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.5306633291614518) internal successors, (1223), 799 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1223 transitions. [2021-12-28 01:09:32,710 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1223 transitions. Word has length 56 [2021-12-28 01:09:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,711 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1223 transitions. [2021-12-28 01:09:32,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1223 transitions. [2021-12-28 01:09:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:09:32,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,712 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] [2021-12-28 01:09:32,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:09:32,713 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash 294385397, now seen corresponding path program 1 times [2021-12-28 01:09:32,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614939132] [2021-12-28 01:09:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614939132] [2021-12-28 01:09:32,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614939132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:32,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759344844] [2021-12-28 01:09:32,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:32,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:32,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:32,783 INFO L87 Difference]: Start difference. First operand 800 states and 1223 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,994 INFO L93 Difference]: Finished difference Result 3568 states and 5459 transitions. [2021-12-28 01:09:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:32,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-28 01:09:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:33,005 INFO L225 Difference]: With dead ends: 3568 [2021-12-28 01:09:33,005 INFO L226 Difference]: Without dead ends: 2798 [2021-12-28 01:09:33,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:33,013 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 356 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:33,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 652 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:33,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-12-28 01:09:33,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2792. [2021-12-28 01:09:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 1.5216768183446794) internal successors, (4247), 2791 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4247 transitions. [2021-12-28 01:09:33,166 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4247 transitions. Word has length 57 [2021-12-28 01:09:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:33,166 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 4247 transitions. [2021-12-28 01:09:33,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4247 transitions. [2021-12-28 01:09:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-28 01:09:33,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:33,168 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] [2021-12-28 01:09:33,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:09:33,168 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1296866655, now seen corresponding path program 1 times [2021-12-28 01:09:33,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:33,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886788072] [2021-12-28 01:09:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:33,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:33,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:33,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886788072] [2021-12-28 01:09:33,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886788072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:33,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:33,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:33,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920535190] [2021-12-28 01:09:33,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:33,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:33,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:33,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:33,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:33,214 INFO L87 Difference]: Start difference. First operand 2792 states and 4247 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:33,438 INFO L93 Difference]: Finished difference Result 7468 states and 11289 transitions. [2021-12-28 01:09:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:33,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-28 01:09:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:33,452 INFO L225 Difference]: With dead ends: 7468 [2021-12-28 01:09:33,452 INFO L226 Difference]: Without dead ends: 4706 [2021-12-28 01:09:33,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:33,455 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 93 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:33,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 318 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2021-12-28 01:09:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 4704. [2021-12-28 01:09:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 1.489900063789071) internal successors, (7007), 4703 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 7007 transitions. [2021-12-28 01:09:33,659 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 7007 transitions. Word has length 58 [2021-12-28 01:09:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:33,663 INFO L470 AbstractCegarLoop]: Abstraction has 4704 states and 7007 transitions. [2021-12-28 01:09:33,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 7007 transitions. [2021-12-28 01:09:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-28 01:09:33,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:33,664 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] [2021-12-28 01:09:33,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:09:33,665 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1866607497, now seen corresponding path program 1 times [2021-12-28 01:09:33,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:33,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688374537] [2021-12-28 01:09:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:33,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:33,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:33,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688374537] [2021-12-28 01:09:33,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688374537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:33,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:33,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:09:33,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574494626] [2021-12-28 01:09:33,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:33,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:09:33,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:09:33,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:09:33,799 INFO L87 Difference]: Start difference. First operand 4704 states and 7007 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:34,264 INFO L93 Difference]: Finished difference Result 9890 states and 14496 transitions. [2021-12-28 01:09:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:09:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-28 01:09:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:34,291 INFO L225 Difference]: With dead ends: 9890 [2021-12-28 01:09:34,292 INFO L226 Difference]: Without dead ends: 9888 [2021-12-28 01:09:34,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:09:34,294 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 783 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:34,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 663 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:34,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9888 states. [2021-12-28 01:09:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9888 to 5088. [2021-12-28 01:09:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 1.4529192058187537) internal successors, (7391), 5087 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 7391 transitions. [2021-12-28 01:09:34,610 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 7391 transitions. Word has length 58 [2021-12-28 01:09:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:34,610 INFO L470 AbstractCegarLoop]: Abstraction has 5088 states and 7391 transitions. [2021-12-28 01:09:34,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 7391 transitions. [2021-12-28 01:09:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-28 01:09:34,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:34,612 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] [2021-12-28 01:09:34,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:09:34,612 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2082836158, now seen corresponding path program 1 times [2021-12-28 01:09:34,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:34,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049971957] [2021-12-28 01:09:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:34,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:34,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:34,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049971957] [2021-12-28 01:09:34,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049971957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:34,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:34,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:34,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955344261] [2021-12-28 01:09:34,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:34,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:34,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:34,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:34,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:34,667 INFO L87 Difference]: Start difference. First operand 5088 states and 7391 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:35,009 INFO L93 Difference]: Finished difference Result 12334 states and 17947 transitions. [2021-12-28 01:09:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:35,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-28 01:09:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:35,029 INFO L225 Difference]: With dead ends: 12334 [2021-12-28 01:09:35,030 INFO L226 Difference]: Without dead ends: 7276 [2021-12-28 01:09:35,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:35,037 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 71 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:35,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 240 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-12-28 01:09:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 7218. [2021-12-28 01:09:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 1.4433975336012193) internal successors, (10417), 7217 states have internal predecessors, (10417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 10417 transitions. [2021-12-28 01:09:35,372 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 10417 transitions. Word has length 59 [2021-12-28 01:09:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:35,372 INFO L470 AbstractCegarLoop]: Abstraction has 7218 states and 10417 transitions. [2021-12-28 01:09:35,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 10417 transitions. [2021-12-28 01:09:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 01:09:35,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:35,376 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:09:35,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:09:35,377 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1385324011, now seen corresponding path program 1 times [2021-12-28 01:09:35,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:35,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584316694] [2021-12-28 01:09:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:35,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:35,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:35,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584316694] [2021-12-28 01:09:35,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584316694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:09:35,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100787114] [2021-12-28 01:09:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:35,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:35,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:35,504 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) [2021-12-28 01:09:35,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:09:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:35,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 01:09:35,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:09:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:35,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:09:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:36,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100787114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:09:36,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:09:36,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-28 01:09:36,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662363062] [2021-12-28 01:09:36,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:09:36,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 01:09:36,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 01:09:36,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:09:36,037 INFO L87 Difference]: Start difference. First operand 7218 states and 10417 transitions. Second operand has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:43,360 INFO L93 Difference]: Finished difference Result 91924 states and 132191 transitions. [2021-12-28 01:09:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-28 01:09:43,360 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-28 01:09:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:43,528 INFO L225 Difference]: With dead ends: 91924 [2021-12-28 01:09:43,529 INFO L226 Difference]: Without dead ends: 84994 [2021-12-28 01:09:43,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1857, Invalid=7455, Unknown=0, NotChecked=0, Total=9312 [2021-12-28 01:09:43,557 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 6778 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6778 SdHoareTripleChecker+Valid, 3173 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:43,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6778 Valid, 3173 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 01:09:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84994 states. [2021-12-28 01:09:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84994 to 49302. [2021-12-28 01:09:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49302 states, 49301 states have (on average 1.4253463418591914) internal successors, (70271), 49301 states have internal predecessors, (70271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49302 states to 49302 states and 70271 transitions. [2021-12-28 01:09:46,906 INFO L78 Accepts]: Start accepts. Automaton has 49302 states and 70271 transitions. Word has length 84 [2021-12-28 01:09:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:46,906 INFO L470 AbstractCegarLoop]: Abstraction has 49302 states and 70271 transitions. [2021-12-28 01:09:46,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 49302 states and 70271 transitions. [2021-12-28 01:09:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 01:09:46,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:46,913 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:09:46,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 01:09:47,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-28 01:09:47,114 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:47,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1919863804, now seen corresponding path program 1 times [2021-12-28 01:09:47,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:47,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63981618] [2021-12-28 01:09:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:47,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:47,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:47,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63981618] [2021-12-28 01:09:47,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63981618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:47,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:47,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:47,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054510393] [2021-12-28 01:09:47,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:47,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:47,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:47,149 INFO L87 Difference]: Start difference. First operand 49302 states and 70271 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:50,718 INFO L93 Difference]: Finished difference Result 95094 states and 135561 transitions. [2021-12-28 01:09:50,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:50,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-28 01:09:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:50,825 INFO L225 Difference]: With dead ends: 95094 [2021-12-28 01:09:50,825 INFO L226 Difference]: Without dead ends: 67714 [2021-12-28 01:09:50,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:50,850 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 72 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:50,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67714 states. [2021-12-28 01:09:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67714 to 63482. [2021-12-28 01:09:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63482 states, 63481 states have (on average 1.4087522250752194) internal successors, (89429), 63481 states have internal predecessors, (89429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63482 states to 63482 states and 89429 transitions. [2021-12-28 01:09:54,383 INFO L78 Accepts]: Start accepts. Automaton has 63482 states and 89429 transitions. Word has length 84 [2021-12-28 01:09:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:54,383 INFO L470 AbstractCegarLoop]: Abstraction has 63482 states and 89429 transitions. [2021-12-28 01:09:54,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 63482 states and 89429 transitions. [2021-12-28 01:09:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 01:09:54,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:54,393 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:09:54,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:09:54,393 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:54,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1033627306, now seen corresponding path program 1 times [2021-12-28 01:09:54,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:54,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712392204] [2021-12-28 01:09:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:54,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 01:09:54,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712392204] [2021-12-28 01:09:54,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712392204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:54,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:54,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:54,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964535371] [2021-12-28 01:09:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:54,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:54,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:54,451 INFO L87 Difference]: Start difference. First operand 63482 states and 89429 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:00,786 INFO L93 Difference]: Finished difference Result 149388 states and 211620 transitions. [2021-12-28 01:10:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:10:00,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 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 84 [2021-12-28 01:10:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:00,972 INFO L225 Difference]: With dead ends: 149388 [2021-12-28 01:10:00,972 INFO L226 Difference]: Without dead ends: 121306 [2021-12-28 01:10:01,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:10:01,006 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 678 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:01,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 824 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121306 states. [2021-12-28 01:10:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121306 to 89144. [2021-12-28 01:10:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89144 states, 89143 states have (on average 1.4068743479577757) internal successors, (125413), 89143 states have internal predecessors, (125413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89144 states to 89144 states and 125413 transitions. [2021-12-28 01:10:06,646 INFO L78 Accepts]: Start accepts. Automaton has 89144 states and 125413 transitions. Word has length 84 [2021-12-28 01:10:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:06,646 INFO L470 AbstractCegarLoop]: Abstraction has 89144 states and 125413 transitions. [2021-12-28 01:10:06,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 89144 states and 125413 transitions. [2021-12-28 01:10:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 01:10:06,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:06,654 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:10:06,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:10:06,654 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash -19484726, now seen corresponding path program 1 times [2021-12-28 01:10:06,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:06,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502175602] [2021-12-28 01:10:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:06,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:06,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:06,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502175602] [2021-12-28 01:10:06,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502175602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:06,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:06,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:06,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406502932] [2021-12-28 01:10:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:06,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:06,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:06,683 INFO L87 Difference]: Start difference. First operand 89144 states and 125413 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:12,451 INFO L93 Difference]: Finished difference Result 143256 states and 200676 transitions. [2021-12-28 01:10:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-28 01:10:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:12,570 INFO L225 Difference]: With dead ends: 143256 [2021-12-28 01:10:12,570 INFO L226 Difference]: Without dead ends: 91970 [2021-12-28 01:10:12,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:12,605 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 73 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:12,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 304 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91970 states.