./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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.6.ufo.BOUNDED-12.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 65159196aa732cf84d788dcb31500c216d665703806e14a7c6f7047ab62d591b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:30:43,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:30:43,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:30:43,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:30:43,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:30:43,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:30:43,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:30:43,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:30:43,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:30:43,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:30:43,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:30:43,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:30:43,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:30:43,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:30:43,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:30:43,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:30:43,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:30:43,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:30:43,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:30:43,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:30:43,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:30:43,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:30:43,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:30:43,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:30:43,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:30:43,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:30:43,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:30:43,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:30:43,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:30:43,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:30:43,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:30:43,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:30:43,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:30:43,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:30:43,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:30:43,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:30:43,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:30:43,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:30:43,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:30:43,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:30:43,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:30:43,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:30:43,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:30:43,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:30:43,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:30:43,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:30:43,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:30:43,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:30:43,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:30:43,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:30:43,461 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:30:43,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:30:43,462 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:30:43,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:30:43,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:30:43,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:30:43,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:30:43,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:30:43,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:30:43,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:30:43,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:30:43,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:30:43,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:30:43,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:30:43,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:30:43,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:30:43,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:30:43,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:30:43,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:30:43,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:30:43,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:30:43,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:30:43,465 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:30:43,465 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:30:43,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:30:43,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:30:43,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65159196aa732cf84d788dcb31500c216d665703806e14a7c6f7047ab62d591b [2021-12-21 13:30:43,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:30:43,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:30:43,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:30:43,652 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:30:43,653 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:30:43,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2021-12-21 13:30:43,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9991de80e/93b6ef940e394167805714f9e701b333/FLAG89105142e [2021-12-21 13:30:44,082 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:30:44,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2021-12-21 13:30:44,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9991de80e/93b6ef940e394167805714f9e701b333/FLAG89105142e [2021-12-21 13:30:44,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9991de80e/93b6ef940e394167805714f9e701b333 [2021-12-21 13:30:44,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:30:44,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:30:44,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:30:44,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:30:44,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:30:44,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b91863c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44, skipping insertion in model container [2021-12-21 13:30:44,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:30:44,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:30:44,286 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.6.ufo.BOUNDED-12.pals.c[15075,15088] [2021-12-21 13:30:44,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:30:44,293 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:30:44,329 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.6.ufo.BOUNDED-12.pals.c[15075,15088] [2021-12-21 13:30:44,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:30:44,339 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:30:44,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44 WrapperNode [2021-12-21 13:30:44,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:30:44,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:30:44,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:30:44,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:30:44,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,379 INFO L137 Inliner]: procedures = 25, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 392 [2021-12-21 13:30:44,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:30:44,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:30:44,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:30:44,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:30:44,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:30:44,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:30:44,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:30:44,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:30:44,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (1/1) ... [2021-12-21 13:30:44,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:30:44,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:30:44,458 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) [2021-12-21 13:30:44,468 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 [2021-12-21 13:30:44,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:30:44,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:30:44,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:30:44,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:30:44,574 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:30:44,575 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:30:44,870 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:30:44,876 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:30:44,876 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:30:44,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:30:44 BoogieIcfgContainer [2021-12-21 13:30:44,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:30:44,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:30:44,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:30:44,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:30:44,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:30:44" (1/3) ... [2021-12-21 13:30:44,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b4d944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:30:44, skipping insertion in model container [2021-12-21 13:30:44,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:30:44" (2/3) ... [2021-12-21 13:30:44,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b4d944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:30:44, skipping insertion in model container [2021-12-21 13:30:44,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:30:44" (3/3) ... [2021-12-21 13:30:44,883 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c [2021-12-21 13:30:44,886 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:30:44,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:30:44,915 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:30:44,919 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 [2021-12-21 13:30:44,919 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:30:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 1.7407407407407407) internal successors, (188), 109 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 13:30:44,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:44,942 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] [2021-12-21 13:30:44,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1259035486, now seen corresponding path program 1 times [2021-12-21 13:30:44,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:44,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885402141] [2021-12-21 13:30:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:44,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:45,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:45,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885402141] [2021-12-21 13:30:45,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885402141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:45,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:45,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:30:45,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158013484] [2021-12-21 13:30:45,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:45,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:30:45,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:45,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:30:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:30:45,144 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 1.7407407407407407) internal successors, (188), 109 states have internal predecessors, (188), 0 states have call successors, (0), 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 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:45,174 INFO L93 Difference]: Finished difference Result 175 states and 290 transitions. [2021-12-21 13:30:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:30:45,176 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-21 13:30:45,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:45,184 INFO L225 Difference]: With dead ends: 175 [2021-12-21 13:30:45,184 INFO L226 Difference]: Without dead ends: 106 [2021-12-21 13:30:45,187 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 [2021-12-21 13:30:45,190 INFO L933 BasicCegarLoop]: 185 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, 185 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 [2021-12-21 13:30:45,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:45,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-21 13:30:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-21 13:30:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.723809523809524) internal successors, (181), 105 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 181 transitions. [2021-12-21 13:30:45,226 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 181 transitions. Word has length 37 [2021-12-21 13:30:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:45,227 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 181 transitions. [2021-12-21 13:30:45,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 181 transitions. [2021-12-21 13:30:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 13:30:45,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:45,230 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] [2021-12-21 13:30:45,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:30:45,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1533795100, now seen corresponding path program 1 times [2021-12-21 13:30:45,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:45,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183987103] [2021-12-21 13:30:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:45,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:45,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:45,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183987103] [2021-12-21 13:30:45,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183987103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:45,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:45,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:30:45,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480352210] [2021-12-21 13:30:45,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:45,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:30:45,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:30:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:30:45,351 INFO L87 Difference]: Start difference. First operand 106 states and 181 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:45,449 INFO L93 Difference]: Finished difference Result 170 states and 280 transitions. [2021-12-21 13:30:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:30:45,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-21 13:30:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:45,460 INFO L225 Difference]: With dead ends: 170 [2021-12-21 13:30:45,460 INFO L226 Difference]: Without dead ends: 106 [2021-12-21 13:30:45,460 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 [2021-12-21 13:30:45,461 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 3 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:45,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 673 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-21 13:30:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-21 13:30:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 105 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-12-21 13:30:45,466 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 37 [2021-12-21 13:30:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:45,467 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-21 13:30:45,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2021-12-21 13:30:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:45,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:45,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:45,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:30:45,472 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1950823117, now seen corresponding path program 1 times [2021-12-21 13:30:45,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:45,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918175583] [2021-12-21 13:30:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:45,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:45,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:45,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918175583] [2021-12-21 13:30:45,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918175583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:45,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:45,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:45,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929589339] [2021-12-21 13:30:45,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:45,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:45,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:45,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:45,572 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:45,611 INFO L93 Difference]: Finished difference Result 220 states and 321 transitions. [2021-12-21 13:30:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:45,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:45,613 INFO L225 Difference]: With dead ends: 220 [2021-12-21 13:30:45,613 INFO L226 Difference]: Without dead ends: 160 [2021-12-21 13:30:45,614 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 [2021-12-21 13:30:45,615 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 85 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 315 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 [2021-12-21 13:30:45,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 315 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-21 13:30:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-12-21 13:30:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.4267515923566878) internal successors, (224), 157 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) [2021-12-21 13:30:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 224 transitions. [2021-12-21 13:30:45,629 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 224 transitions. Word has length 76 [2021-12-21 13:30:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:45,630 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 224 transitions. [2021-12-21 13:30:45,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 224 transitions. [2021-12-21 13:30:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:45,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:45,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:45,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:30:45,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash 699917825, now seen corresponding path program 1 times [2021-12-21 13:30:45,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:45,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009076634] [2021-12-21 13:30:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:45,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:45,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:45,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009076634] [2021-12-21 13:30:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009076634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:45,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:45,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:45,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787595664] [2021-12-21 13:30:45,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:45,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:45,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:45,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:45,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:45,705 INFO L87 Difference]: Start difference. First operand 158 states and 224 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:45,719 INFO L93 Difference]: Finished difference Result 370 states and 560 transitions. [2021-12-21 13:30:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:45,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:45,721 INFO L225 Difference]: With dead ends: 370 [2021-12-21 13:30:45,721 INFO L226 Difference]: Without dead ends: 258 [2021-12-21 13:30:45,722 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 [2021-12-21 13:30:45,722 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 81 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 314 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 [2021-12-21 13:30:45,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 314 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-21 13:30:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2021-12-21 13:30:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4862745098039216) internal successors, (379), 255 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 379 transitions. [2021-12-21 13:30:45,734 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 379 transitions. Word has length 76 [2021-12-21 13:30:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:45,735 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 379 transitions. [2021-12-21 13:30:45,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 379 transitions. [2021-12-21 13:30:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:45,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:45,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:45,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:30:45,736 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash -45664905, now seen corresponding path program 1 times [2021-12-21 13:30:45,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:45,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588525098] [2021-12-21 13:30:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:45,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:45,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:45,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588525098] [2021-12-21 13:30:45,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588525098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:45,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:45,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:45,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921041372] [2021-12-21 13:30:45,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:45,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:45,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:45,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:45,777 INFO L87 Difference]: Start difference. First operand 256 states and 379 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:45,793 INFO L93 Difference]: Finished difference Result 652 states and 1005 transitions. [2021-12-21 13:30:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:45,795 INFO L225 Difference]: With dead ends: 652 [2021-12-21 13:30:45,795 INFO L226 Difference]: Without dead ends: 442 [2021-12-21 13:30:45,796 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 [2021-12-21 13:30:45,797 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 77 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 313 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 [2021-12-21 13:30:45,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 313 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-21 13:30:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2021-12-21 13:30:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5193621867881548) internal successors, (667), 439 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 667 transitions. [2021-12-21 13:30:45,821 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 667 transitions. Word has length 76 [2021-12-21 13:30:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:45,822 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 667 transitions. [2021-12-21 13:30:45,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 667 transitions. [2021-12-21 13:30:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:45,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:45,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:45,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:30:45,823 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1985695763, now seen corresponding path program 1 times [2021-12-21 13:30:45,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:45,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924038799] [2021-12-21 13:30:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:45,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:45,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:45,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924038799] [2021-12-21 13:30:45,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924038799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:45,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:45,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:45,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800080643] [2021-12-21 13:30:45,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:45,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:45,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:45,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:45,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:45,860 INFO L87 Difference]: Start difference. First operand 440 states and 667 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:45,884 INFO L93 Difference]: Finished difference Result 1180 states and 1829 transitions. [2021-12-21 13:30:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:45,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:45,888 INFO L225 Difference]: With dead ends: 1180 [2021-12-21 13:30:45,888 INFO L226 Difference]: Without dead ends: 786 [2021-12-21 13:30:45,889 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 [2021-12-21 13:30:45,890 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 73 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 312 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 [2021-12-21 13:30:45,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-12-21 13:30:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 784. [2021-12-21 13:30:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.5312899106002553) internal successors, (1199), 783 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1199 transitions. [2021-12-21 13:30:45,913 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1199 transitions. Word has length 76 [2021-12-21 13:30:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:45,914 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1199 transitions. [2021-12-21 13:30:45,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1199 transitions. [2021-12-21 13:30:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:30:45,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:45,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:45,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:30:45,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:45,916 INFO L85 PathProgramCache]: Analyzing trace with hash 714986851, now seen corresponding path program 1 times [2021-12-21 13:30:45,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:45,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280199540] [2021-12-21 13:30:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:45,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:46,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280199540] [2021-12-21 13:30:46,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280199540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:46,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:46,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:30:46,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570939968] [2021-12-21 13:30:46,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:46,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:30:46,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:30:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:46,017 INFO L87 Difference]: Start difference. First operand 784 states and 1199 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:46,521 INFO L93 Difference]: Finished difference Result 9640 states and 15035 transitions. [2021-12-21 13:30:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:30:46,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-21 13:30:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:46,551 INFO L225 Difference]: With dead ends: 9640 [2021-12-21 13:30:46,551 INFO L226 Difference]: Without dead ends: 8902 [2021-12-21 13:30:46,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:30:46,556 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 2232 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2232 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:46,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2232 Valid, 1240 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8902 states. [2021-12-21 13:30:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8902 to 1520. [2021-12-21 13:30:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 1.5266622778143515) internal successors, (2319), 1519 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2319 transitions. [2021-12-21 13:30:46,706 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2319 transitions. Word has length 76 [2021-12-21 13:30:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:46,707 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 2319 transitions. [2021-12-21 13:30:46,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2319 transitions. [2021-12-21 13:30:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 13:30:46,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:46,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:46,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:30:46,709 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:46,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1508096525, now seen corresponding path program 1 times [2021-12-21 13:30:46,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:46,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655100663] [2021-12-21 13:30:46,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:46,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:46,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655100663] [2021-12-21 13:30:46,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655100663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:46,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:46,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:46,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411165922] [2021-12-21 13:30:46,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:46,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:46,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:46,748 INFO L87 Difference]: Start difference. First operand 1520 states and 2319 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-12-21 13:30:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:46,850 INFO L93 Difference]: Finished difference Result 3694 states and 5667 transitions. [2021-12-21 13:30:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 78 [2021-12-21 13:30:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:46,856 INFO L225 Difference]: With dead ends: 3694 [2021-12-21 13:30:46,856 INFO L226 Difference]: Without dead ends: 2220 [2021-12-21 13:30:46,859 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 [2021-12-21 13:30:46,861 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 57 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 252 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 [2021-12-21 13:30:46,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 252 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-12-21 13:30:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2218. [2021-12-21 13:30:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.5196211096075778) internal successors, (3369), 2217 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3369 transitions. [2021-12-21 13:30:46,976 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3369 transitions. Word has length 78 [2021-12-21 13:30:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:46,977 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 3369 transitions. [2021-12-21 13:30:46,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-12-21 13:30:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3369 transitions. [2021-12-21 13:30:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 13:30:46,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:46,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:46,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:30:46,978 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:46,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:46,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1441603013, now seen corresponding path program 1 times [2021-12-21 13:30:46,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:46,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034821964] [2021-12-21 13:30:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:46,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:47,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:47,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034821964] [2021-12-21 13:30:47,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034821964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:47,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:47,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:30:47,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133224072] [2021-12-21 13:30:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:47,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:30:47,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:30:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:47,151 INFO L87 Difference]: Start difference. First operand 2218 states and 3369 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2021-12-21 13:30:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:47,423 INFO L93 Difference]: Finished difference Result 4390 states and 6691 transitions. [2021-12-21 13:30:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:30:47,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 78 [2021-12-21 13:30:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:47,429 INFO L225 Difference]: With dead ends: 4390 [2021-12-21 13:30:47,430 INFO L226 Difference]: Without dead ends: 2220 [2021-12-21 13:30:47,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-21 13:30:47,432 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 639 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:47,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 632 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-12-21 13:30:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2218. [2021-12-21 13:30:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.5087956698240865) internal successors, (3345), 2217 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3345 transitions. [2021-12-21 13:30:47,516 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3345 transitions. Word has length 78 [2021-12-21 13:30:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:47,517 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 3345 transitions. [2021-12-21 13:30:47,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2021-12-21 13:30:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3345 transitions. [2021-12-21 13:30:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 13:30:47,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:47,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:47,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:30:47,518 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:47,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:47,518 INFO L85 PathProgramCache]: Analyzing trace with hash 347311063, now seen corresponding path program 1 times [2021-12-21 13:30:47,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:47,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108622328] [2021-12-21 13:30:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:47,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:47,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:47,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108622328] [2021-12-21 13:30:47,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108622328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:47,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:47,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:47,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370050638] [2021-12-21 13:30:47,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:47,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:47,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:47,545 INFO L87 Difference]: Start difference. First operand 2218 states and 3345 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-12-21 13:30:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:47,711 INFO L93 Difference]: Finished difference Result 6270 states and 9459 transitions. [2021-12-21 13:30:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:47,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 78 [2021-12-21 13:30:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:47,721 INFO L225 Difference]: With dead ends: 6270 [2021-12-21 13:30:47,721 INFO L226 Difference]: Without dead ends: 4100 [2021-12-21 13:30:47,723 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 [2021-12-21 13:30:47,723 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 65 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 302 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 [2021-12-21 13:30:47,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 302 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-12-21 13:30:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 4098. [2021-12-21 13:30:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.4920673663656334) internal successors, (6113), 4097 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 6113 transitions. [2021-12-21 13:30:47,921 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 6113 transitions. Word has length 78 [2021-12-21 13:30:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:47,921 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 6113 transitions. [2021-12-21 13:30:47,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-12-21 13:30:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 6113 transitions. [2021-12-21 13:30:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 13:30:47,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:47,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:47,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:30:47,923 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:47,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1594818679, now seen corresponding path program 1 times [2021-12-21 13:30:47,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:47,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999568435] [2021-12-21 13:30:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:47,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:47,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:47,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999568435] [2021-12-21 13:30:47,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999568435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:47,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:47,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:30:47,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321996468] [2021-12-21 13:30:47,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:47,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:30:47,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:47,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:30:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:47,964 INFO L87 Difference]: Start difference. First operand 4098 states and 6113 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-12-21 13:30:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:48,289 INFO L93 Difference]: Finished difference Result 11622 states and 17283 transitions. [2021-12-21 13:30:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:48,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 78 [2021-12-21 13:30:48,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:48,311 INFO L225 Difference]: With dead ends: 11622 [2021-12-21 13:30:48,311 INFO L226 Difference]: Without dead ends: 7572 [2021-12-21 13:30:48,316 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 [2021-12-21 13:30:48,317 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 69 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 311 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 [2021-12-21 13:30:48,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 311 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7572 states. [2021-12-21 13:30:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7572 to 7570. [2021-12-21 13:30:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 1.4692826000792707) internal successors, (11121), 7569 states have internal predecessors, (11121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 11121 transitions. [2021-12-21 13:30:48,702 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 11121 transitions. Word has length 78 [2021-12-21 13:30:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:48,702 INFO L470 AbstractCegarLoop]: Abstraction has 7570 states and 11121 transitions. [2021-12-21 13:30:48,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-12-21 13:30:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 11121 transitions. [2021-12-21 13:30:48,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 13:30:48,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:48,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:48,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:30:48,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2140223893, now seen corresponding path program 1 times [2021-12-21 13:30:48,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954656879] [2021-12-21 13:30:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:48,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:48,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:48,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954656879] [2021-12-21 13:30:48,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954656879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:48,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:48,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:30:48,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551428652] [2021-12-21 13:30:48,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:48,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:30:48,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:48,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:30:48,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:30:48,746 INFO L87 Difference]: Start difference. First operand 7570 states and 11121 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:49,282 INFO L93 Difference]: Finished difference Result 15092 states and 22194 transitions. [2021-12-21 13:30:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:30:49,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-21 13:30:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:49,292 INFO L225 Difference]: With dead ends: 15092 [2021-12-21 13:30:49,293 INFO L226 Difference]: Without dead ends: 7570 [2021-12-21 13:30:49,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:30:49,298 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 573 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:49,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 176 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7570 states. [2021-12-21 13:30:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7570 to 7570. [2021-12-21 13:30:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 1.4523715153917294) internal successors, (10993), 7569 states have internal predecessors, (10993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 10993 transitions. [2021-12-21 13:30:49,687 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 10993 transitions. Word has length 79 [2021-12-21 13:30:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:49,688 INFO L470 AbstractCegarLoop]: Abstraction has 7570 states and 10993 transitions. [2021-12-21 13:30:49,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 10993 transitions. [2021-12-21 13:30:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 13:30:49,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:49,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:49,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:30:49,689 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1438624019, now seen corresponding path program 1 times [2021-12-21 13:30:49,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:49,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159651277] [2021-12-21 13:30:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:49,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:30:49,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159651277] [2021-12-21 13:30:49,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159651277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:49,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:49,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:30:49,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128071435] [2021-12-21 13:30:49,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:49,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:30:49,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:49,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:30:49,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:30:49,733 INFO L87 Difference]: Start difference. First operand 7570 states and 10993 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:50,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:50,446 INFO L93 Difference]: Finished difference Result 14033 states and 20199 transitions. [2021-12-21 13:30:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:30:50,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-21 13:30:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:50,468 INFO L225 Difference]: With dead ends: 14033 [2021-12-21 13:30:50,469 INFO L226 Difference]: Without dead ends: 14031 [2021-12-21 13:30:50,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:50,472 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 253 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:50,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 584 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14031 states. [2021-12-21 13:30:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14031 to 7954. [2021-12-21 13:30:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 1.4265057211115302) internal successors, (11345), 7953 states have internal predecessors, (11345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 11345 transitions. [2021-12-21 13:30:51,088 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 11345 transitions. Word has length 79 [2021-12-21 13:30:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:51,088 INFO L470 AbstractCegarLoop]: Abstraction has 7954 states and 11345 transitions. [2021-12-21 13:30:51,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 11345 transitions. [2021-12-21 13:30:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:30:51,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:51,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:51,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:30:51,094 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:51,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:51,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1530216785, now seen corresponding path program 1 times [2021-12-21 13:30:51,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:51,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157111316] [2021-12-21 13:30:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:51,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 13:30:51,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157111316] [2021-12-21 13:30:51,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157111316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:51,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:51,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:30:51,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184636169] [2021-12-21 13:30:51,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:51,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:30:51,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:30:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:51,171 INFO L87 Difference]: Start difference. First operand 7954 states and 11345 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:53,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:53,862 INFO L93 Difference]: Finished difference Result 56960 states and 81288 transitions. [2021-12-21 13:30:53,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:30:53,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 111 [2021-12-21 13:30:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:53,933 INFO L225 Difference]: With dead ends: 56960 [2021-12-21 13:30:53,933 INFO L226 Difference]: Without dead ends: 49054 [2021-12-21 13:30:53,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:30:53,948 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1395 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:53,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1395 Valid, 931 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49054 states. [2021-12-21 13:30:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49054 to 15858. [2021-12-21 13:30:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15858 states, 15857 states have (on average 1.421769565491581) internal successors, (22545), 15857 states have internal predecessors, (22545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15858 states to 15858 states and 22545 transitions. [2021-12-21 13:30:55,462 INFO L78 Accepts]: Start accepts. Automaton has 15858 states and 22545 transitions. Word has length 111 [2021-12-21 13:30:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:30:55,463 INFO L470 AbstractCegarLoop]: Abstraction has 15858 states and 22545 transitions. [2021-12-21 13:30:55,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 15858 states and 22545 transitions. [2021-12-21 13:30:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:30:55,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:30:55,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:30:55,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:30:55,469 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:30:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:30:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1517242895, now seen corresponding path program 1 times [2021-12-21 13:30:55,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:30:55,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828993179] [2021-12-21 13:30:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:30:55,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:30:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:30:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 13:30:55,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:30:55,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828993179] [2021-12-21 13:30:55,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828993179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:30:55,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:30:55,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:30:55,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150377543] [2021-12-21 13:30:55,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:30:55,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:30:55,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:30:55,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:30:55,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:30:55,533 INFO L87 Difference]: Start difference. First operand 15858 states and 22545 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:58,873 INFO L93 Difference]: Finished difference Result 64864 states and 92488 transitions. [2021-12-21 13:30:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:30:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 111 [2021-12-21 13:30:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:58,961 INFO L225 Difference]: With dead ends: 64864 [2021-12-21 13:30:58,962 INFO L226 Difference]: Without dead ends: 56958 [2021-12-21 13:30:58,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:30:58,991 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1223 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:58,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 994 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:30:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56958 states. [2021-12-21 13:31:01,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56958 to 27730. [2021-12-21 13:31:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27730 states, 27729 states have (on average 1.416026542608821) internal successors, (39265), 27729 states have internal predecessors, (39265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 39265 transitions. [2021-12-21 13:31:01,498 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 39265 transitions. Word has length 111 [2021-12-21 13:31:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:01,499 INFO L470 AbstractCegarLoop]: Abstraction has 27730 states and 39265 transitions. [2021-12-21 13:31:01,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 39265 transitions. [2021-12-21 13:31:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:31:01,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:01,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:01,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:31:01,506 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:01,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:01,506 INFO L85 PathProgramCache]: Analyzing trace with hash -47809913, now seen corresponding path program 1 times [2021-12-21 13:31:01,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:01,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698593812] [2021-12-21 13:31:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:01,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:31:01,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:01,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698593812] [2021-12-21 13:31:01,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698593812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:01,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:01,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:31:01,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142594806] [2021-12-21 13:31:01,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:01,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:31:01,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:01,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:31:01,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:31:01,570 INFO L87 Difference]: Start difference. First operand 27730 states and 39265 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:05,727 INFO L93 Difference]: Finished difference Result 72768 states and 103688 transitions. [2021-12-21 13:31:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:31:05,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 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 111 [2021-12-21 13:31:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:05,826 INFO L225 Difference]: With dead ends: 72768 [2021-12-21 13:31:05,826 INFO L226 Difference]: Without dead ends: 64862 [2021-12-21 13:31:05,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:31:05,854 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1197 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:05,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1197 Valid, 1014 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:05,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64862 states. [2021-12-21 13:31:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64862 to 35634. [2021-12-21 13:31:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35634 states, 35633 states have (on average 1.416243369909915) internal successors, (50465), 35633 states have internal predecessors, (50465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35634 states to 35634 states and 50465 transitions. [2021-12-21 13:31:08,554 INFO L78 Accepts]: Start accepts. Automaton has 35634 states and 50465 transitions. Word has length 111 [2021-12-21 13:31:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:08,554 INFO L470 AbstractCegarLoop]: Abstraction has 35634 states and 50465 transitions. [2021-12-21 13:31:08,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 35634 states and 50465 transitions. [2021-12-21 13:31:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:31:08,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:08,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:08,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:31:08,562 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1283268953, now seen corresponding path program 1 times [2021-12-21 13:31:08,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:08,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306197543] [2021-12-21 13:31:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:08,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:31:08,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:08,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306197543] [2021-12-21 13:31:08,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306197543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:08,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:08,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:31:08,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169793736] [2021-12-21 13:31:08,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:08,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:31:08,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:08,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:31:08,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:31:08,620 INFO L87 Difference]: Start difference. First operand 35634 states and 50465 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:14,069 INFO L93 Difference]: Finished difference Result 80672 states and 114888 transitions. [2021-12-21 13:31:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:31:14,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 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 111 [2021-12-21 13:31:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:14,178 INFO L225 Difference]: With dead ends: 80672 [2021-12-21 13:31:14,179 INFO L226 Difference]: Without dead ends: 72766 [2021-12-21 13:31:14,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:31:14,202 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 1267 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:14,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1267 Valid, 1029 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:14,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72766 states. [2021-12-21 13:31:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72766 to 43538. [2021-12-21 13:31:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43538 states, 43537 states have (on average 1.4163814686358729) internal successors, (61665), 43537 states have internal predecessors, (61665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43538 states to 43538 states and 61665 transitions. [2021-12-21 13:31:17,790 INFO L78 Accepts]: Start accepts. Automaton has 43538 states and 61665 transitions. Word has length 111 [2021-12-21 13:31:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:17,790 INFO L470 AbstractCegarLoop]: Abstraction has 43538 states and 61665 transitions. [2021-12-21 13:31:17,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 43538 states and 61665 transitions. [2021-12-21 13:31:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:31:17,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:17,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:17,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 13:31:17,823 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1590702791, now seen corresponding path program 1 times [2021-12-21 13:31:17,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:17,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676509691] [2021-12-21 13:31:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:17,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:31:17,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676509691] [2021-12-21 13:31:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676509691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:17,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:17,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:31:17,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023582886] [2021-12-21 13:31:17,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:17,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:31:17,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:17,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:31:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:31:17,881 INFO L87 Difference]: Start difference. First operand 43538 states and 61665 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:24,382 INFO L93 Difference]: Finished difference Result 88576 states and 126088 transitions. [2021-12-21 13:31:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:31:24,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 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 111 [2021-12-21 13:31:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:24,513 INFO L225 Difference]: With dead ends: 88576 [2021-12-21 13:31:24,513 INFO L226 Difference]: Without dead ends: 80670 [2021-12-21 13:31:24,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:31:24,543 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 1369 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:24,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1369 Valid, 1040 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80670 states. [2021-12-21 13:31:29,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80670 to 51442. [2021-12-21 13:31:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51442 states, 51441 states have (on average 1.416477129138236) internal successors, (72865), 51441 states have internal predecessors, (72865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51442 states to 51442 states and 72865 transitions. [2021-12-21 13:31:29,521 INFO L78 Accepts]: Start accepts. Automaton has 51442 states and 72865 transitions. Word has length 111 [2021-12-21 13:31:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:29,522 INFO L470 AbstractCegarLoop]: Abstraction has 51442 states and 72865 transitions. [2021-12-21 13:31:29,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 51442 states and 72865 transitions. [2021-12-21 13:31:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:31:29,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:29,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:29,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 13:31:29,539 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1024882407, now seen corresponding path program 1 times [2021-12-21 13:31:29,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117185136] [2021-12-21 13:31:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:29,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:31:29,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:29,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117185136] [2021-12-21 13:31:29,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117185136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:29,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:29,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:31:29,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935585491] [2021-12-21 13:31:29,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:29,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:31:29,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:29,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:31:29,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:31:29,658 INFO L87 Difference]: Start difference. First operand 51442 states and 72865 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:37,911 INFO L93 Difference]: Finished difference Result 91680 states and 130568 transitions. [2021-12-21 13:31:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:31:37,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-21 13:31:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:38,037 INFO L225 Difference]: With dead ends: 91680 [2021-12-21 13:31:38,037 INFO L226 Difference]: Without dead ends: 86174 [2021-12-21 13:31:38,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:31:38,060 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 1368 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:38,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1368 Valid, 947 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:38,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86174 states. [2021-12-21 13:31:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86174 to 56946. [2021-12-21 13:31:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56946 states, 56945 states have (on average 1.4178066555448239) internal successors, (80737), 56945 states have internal predecessors, (80737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56946 states to 56946 states and 80737 transitions. [2021-12-21 13:31:44,353 INFO L78 Accepts]: Start accepts. Automaton has 56946 states and 80737 transitions. Word has length 111 [2021-12-21 13:31:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:44,353 INFO L470 AbstractCegarLoop]: Abstraction has 56946 states and 80737 transitions. [2021-12-21 13:31:44,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 56946 states and 80737 transitions. [2021-12-21 13:31:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 13:31:44,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:44,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:44,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 13:31:44,363 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1441172198, now seen corresponding path program 1 times [2021-12-21 13:31:44,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:44,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262638619] [2021-12-21 13:31:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:44,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:44,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:44,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262638619] [2021-12-21 13:31:44,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262638619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:44,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:44,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:44,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328047728] [2021-12-21 13:31:44,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:44,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:44,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:44,408 INFO L87 Difference]: Start difference. First operand 56946 states and 80737 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:50,151 INFO L93 Difference]: Finished difference Result 113846 states and 161427 transitions. [2021-12-21 13:31:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:50,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-12-21 13:31:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:50,245 INFO L225 Difference]: With dead ends: 113846 [2021-12-21 13:31:50,246 INFO L226 Difference]: Without dead ends: 56948 [2021-12-21 13:31:50,281 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 [2021-12-21 13:31:50,282 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 59 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:50,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 302 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56948 states.