./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.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 17ba764d4851428799f2c4794a4662e2753aae472d291b23839dac79bbfbab6d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:15:27,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:15:27,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:15:27,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:15:27,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:15:27,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:15:27,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:15:27,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:15:27,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:15:27,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:15:27,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:15:27,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:15:27,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:15:27,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:15:27,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:15:27,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:15:27,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:15:27,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:15:27,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:15:27,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:15:27,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:15:27,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:15:27,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:15:27,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:15:27,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:15:27,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:15:27,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:15:27,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:15:27,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:15:27,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:15:27,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:15:27,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:15:27,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:15:27,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:15:27,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:15:27,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:15:27,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:15:27,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:15:27,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:15:27,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:15:27,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:15:27,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:15:27,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:15:27,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:15:27,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:15:27,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:15:27,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:15:27,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:15:27,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:15:27,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:15:27,536 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:15:27,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:15:27,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:15:27,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:15:27,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:15:27,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:15:27,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:15:27,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:15:27,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:15:27,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:15:27,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:15:27,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:15:27,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:15:27,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:15:27,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:15:27,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:15:27,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:15:27,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:15:27,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:15:27,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:15:27,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:15:27,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:15:27,547 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:15:27,547 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:15:27,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:15:27,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:15:27,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17ba764d4851428799f2c4794a4662e2753aae472d291b23839dac79bbfbab6d [2021-12-15 11:15:27,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:15:27,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:15:27,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:15:27,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:15:27,773 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:15:27,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2021-12-15 11:15:27,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d39201b03/bd6973e4a4e44f4d85d2563b86527860/FLAG4e12bb294 [2021-12-15 11:15:28,242 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:15:28,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2021-12-15 11:15:28,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d39201b03/bd6973e4a4e44f4d85d2563b86527860/FLAG4e12bb294 [2021-12-15 11:15:28,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d39201b03/bd6973e4a4e44f4d85d2563b86527860 [2021-12-15 11:15:28,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:15:28,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:15:28,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:15:28,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:15:28,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:15:28,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:15:28" (1/1) ... [2021-12-15 11:15:28,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25267189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:28, skipping insertion in model container [2021-12-15 11:15:28,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:15:28" (1/1) ... [2021-12-15 11:15:28,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:15:28,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:15:28,958 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c[9392,9405] [2021-12-15 11:15:28,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:15:28,971 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:15:29,021 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c[9392,9405] [2021-12-15 11:15:29,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:15:29,031 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:15:29,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29 WrapperNode [2021-12-15 11:15:29,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:15:29,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:15:29,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:15:29,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:15:29,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,075 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 319 [2021-12-15 11:15:29,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:15:29,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:15:29,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:15:29,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:15:29,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:15:29,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:15:29,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:15:29,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:15:29,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (1/1) ... [2021-12-15 11:15:29,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:15:29,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:15:29,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 11:15:29,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 11:15:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:15:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:15:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:15:29,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:15:29,243 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:15:29,245 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:15:29,514 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:15:29,519 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:15:29,520 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:15:29,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:15:29 BoogieIcfgContainer [2021-12-15 11:15:29,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:15:29,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:15:29,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:15:29,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:15:29,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:15:28" (1/3) ... [2021-12-15 11:15:29,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3436c8cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:15:29, skipping insertion in model container [2021-12-15 11:15:29,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:29" (2/3) ... [2021-12-15 11:15:29,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3436c8cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:15:29, skipping insertion in model container [2021-12-15 11:15:29,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:15:29" (3/3) ... [2021-12-15 11:15:29,533 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2021-12-15 11:15:29,536 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:15:29,537 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:15:29,585 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:15:29,593 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:15:29,594 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:15:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 11:15:29,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:29,631 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] [2021-12-15 11:15:29,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:29,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:29,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2019613380, now seen corresponding path program 1 times [2021-12-15 11:15:29,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:29,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894662747] [2021-12-15 11:15:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:29,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:29,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:29,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894662747] [2021-12-15 11:15:29,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894662747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:29,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:29,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:15:29,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171230681] [2021-12-15 11:15:29,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:29,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:15:29,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:15:29,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:15:29,835 INFO L87 Difference]: Start difference. First operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 0 states have call successors, (0), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:29,868 INFO L93 Difference]: Finished difference Result 171 states and 278 transitions. [2021-12-15 11:15:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:15:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-15 11:15:29,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:29,878 INFO L225 Difference]: With dead ends: 171 [2021-12-15 11:15:29,878 INFO L226 Difference]: Without dead ends: 96 [2021-12-15 11:15:29,881 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 [2021-12-15 11:15:29,888 INFO L933 BasicCegarLoop]: 163 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, 163 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 [2021-12-15 11:15:29,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-15 11:15:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-15 11:15:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6736842105263159) internal successors, (159), 95 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 159 transitions. [2021-12-15 11:15:29,926 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 159 transitions. Word has length 29 [2021-12-15 11:15:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:29,926 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 159 transitions. [2021-12-15 11:15:29,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 159 transitions. [2021-12-15 11:15:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 11:15:29,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:29,930 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] [2021-12-15 11:15:29,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:15:29,931 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2141340410, now seen corresponding path program 1 times [2021-12-15 11:15:29,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:29,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061205041] [2021-12-15 11:15:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:29,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061205041] [2021-12-15 11:15:30,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061205041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:15:30,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926114041] [2021-12-15 11:15:30,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:15:30,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:15:30,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:15:30,039 INFO L87 Difference]: Start difference. First operand 96 states and 159 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:30,114 INFO L93 Difference]: Finished difference Result 232 states and 373 transitions. [2021-12-15 11:15:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:15:30,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-15 11:15:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:30,116 INFO L225 Difference]: With dead ends: 232 [2021-12-15 11:15:30,116 INFO L226 Difference]: Without dead ends: 162 [2021-12-15 11:15:30,116 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 [2021-12-15 11:15:30,117 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 107 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:30,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 591 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-15 11:15:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-12-15 11:15:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 95 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2021-12-15 11:15:30,124 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 29 [2021-12-15 11:15:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:30,124 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2021-12-15 11:15:30,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2021-12-15 11:15:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 11:15:30,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:30,125 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] [2021-12-15 11:15:30,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:15:30,126 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1164590349, now seen corresponding path program 1 times [2021-12-15 11:15:30,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:30,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299867580] [2021-12-15 11:15:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:30,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299867580] [2021-12-15 11:15:30,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299867580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:30,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8299118] [2021-12-15 11:15:30,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:30,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:30,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,232 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:30,255 INFO L93 Difference]: Finished difference Result 216 states and 325 transitions. [2021-12-15 11:15:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:30,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-15 11:15:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:30,257 INFO L225 Difference]: With dead ends: 216 [2021-12-15 11:15:30,257 INFO L226 Difference]: Without dead ends: 150 [2021-12-15 11:15:30,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,259 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 93 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 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 [2021-12-15 11:15:30,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-15 11:15:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-12-15 11:15:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.4829931972789117) internal successors, (218), 147 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 218 transitions. [2021-12-15 11:15:30,267 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 218 transitions. Word has length 52 [2021-12-15 11:15:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:30,267 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 218 transitions. [2021-12-15 11:15:30,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 218 transitions. [2021-12-15 11:15:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 11:15:30,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:30,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:30,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:15:30,269 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:30,270 INFO L85 PathProgramCache]: Analyzing trace with hash 502679627, now seen corresponding path program 1 times [2021-12-15 11:15:30,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:30,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914980140] [2021-12-15 11:15:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:30,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914980140] [2021-12-15 11:15:30,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914980140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:30,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353788188] [2021-12-15 11:15:30,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:30,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:30,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,310 INFO L87 Difference]: Start difference. First operand 148 states and 218 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:30,322 INFO L93 Difference]: Finished difference Result 360 states and 554 transitions. [2021-12-15 11:15:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:30,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-15 11:15:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:30,324 INFO L225 Difference]: With dead ends: 360 [2021-12-15 11:15:30,324 INFO L226 Difference]: Without dead ends: 242 [2021-12-15 11:15:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,326 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 88 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 303 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 [2021-12-15 11:15:30,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 303 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-15 11:15:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2021-12-15 11:15:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.5188284518828452) internal successors, (363), 239 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 363 transitions. [2021-12-15 11:15:30,337 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 363 transitions. Word has length 53 [2021-12-15 11:15:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:30,346 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 363 transitions. [2021-12-15 11:15:30,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 363 transitions. [2021-12-15 11:15:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 11:15:30,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:30,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:30,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:15:30,347 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1405286019, now seen corresponding path program 1 times [2021-12-15 11:15:30,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:30,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351782537] [2021-12-15 11:15:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:30,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351782537] [2021-12-15 11:15:30,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351782537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:30,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689987011] [2021-12-15 11:15:30,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:30,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,395 INFO L87 Difference]: Start difference. First operand 240 states and 363 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:30,409 INFO L93 Difference]: Finished difference Result 612 states and 949 transitions. [2021-12-15 11:15:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:30,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-15 11:15:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:30,411 INFO L225 Difference]: With dead ends: 612 [2021-12-15 11:15:30,411 INFO L226 Difference]: Without dead ends: 402 [2021-12-15 11:15:30,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,413 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 83 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 294 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 [2021-12-15 11:15:30,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 294 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-15 11:15:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2021-12-15 11:15:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.531328320802005) internal successors, (611), 399 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 611 transitions. [2021-12-15 11:15:30,427 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 611 transitions. Word has length 54 [2021-12-15 11:15:30,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:30,428 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 611 transitions. [2021-12-15 11:15:30,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 611 transitions. [2021-12-15 11:15:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 11:15:30,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:30,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:30,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:15:30,429 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash 417554395, now seen corresponding path program 1 times [2021-12-15 11:15:30,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:30,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039255269] [2021-12-15 11:15:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:30,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039255269] [2021-12-15 11:15:30,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039255269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:30,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252913328] [2021-12-15 11:15:30,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:30,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,462 INFO L87 Difference]: Start difference. First operand 400 states and 611 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:30,485 INFO L93 Difference]: Finished difference Result 1044 states and 1613 transitions. [2021-12-15 11:15:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:30,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 11:15:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:30,488 INFO L225 Difference]: With dead ends: 1044 [2021-12-15 11:15:30,491 INFO L226 Difference]: Without dead ends: 674 [2021-12-15 11:15:30,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:30,493 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 285 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 [2021-12-15 11:15:30,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 285 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-15 11:15:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2021-12-15 11:15:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.5245901639344261) internal successors, (1023), 671 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1023 transitions. [2021-12-15 11:15:30,515 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1023 transitions. Word has length 55 [2021-12-15 11:15:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:30,515 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1023 transitions. [2021-12-15 11:15:30,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1023 transitions. [2021-12-15 11:15:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 11:15:30,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:30,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:30,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:15:30,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:30,517 INFO L85 PathProgramCache]: Analyzing trace with hash -368690669, now seen corresponding path program 1 times [2021-12-15 11:15:30,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:30,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603539465] [2021-12-15 11:15:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:30,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603539465] [2021-12-15 11:15:30,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603539465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:15:30,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453744568] [2021-12-15 11:15:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:15:30,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:15:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:30,565 INFO L87 Difference]: Start difference. First operand 672 states and 1023 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:30,697 INFO L93 Difference]: Finished difference Result 3882 states and 5988 transitions. [2021-12-15 11:15:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:15:30,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-15 11:15:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:30,711 INFO L225 Difference]: With dead ends: 3882 [2021-12-15 11:15:30,711 INFO L226 Difference]: Without dead ends: 3240 [2021-12-15 11:15:30,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:15:30,714 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 839 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:30,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1028 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-12-15 11:15:30,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1312. [2021-12-15 11:15:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 1.5125858123569793) internal successors, (1983), 1311 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1983 transitions. [2021-12-15 11:15:30,762 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1983 transitions. Word has length 56 [2021-12-15 11:15:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:30,762 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1983 transitions. [2021-12-15 11:15:30,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1983 transitions. [2021-12-15 11:15:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 11:15:30,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:30,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:30,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:15:30,763 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:30,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1072167829, now seen corresponding path program 1 times [2021-12-15 11:15:30,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:30,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664378917] [2021-12-15 11:15:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:30,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:30,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:30,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664378917] [2021-12-15 11:15:30,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664378917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:30,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:30,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:15:30,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258486380] [2021-12-15 11:15:30,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:30,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:15:30,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:30,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:15:30,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:30,864 INFO L87 Difference]: Start difference. First operand 1312 states and 1983 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:31,012 INFO L93 Difference]: Finished difference Result 5864 states and 8803 transitions. [2021-12-15 11:15:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:15:31,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-15 11:15:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:31,025 INFO L225 Difference]: With dead ends: 5864 [2021-12-15 11:15:31,025 INFO L226 Difference]: Without dead ends: 4582 [2021-12-15 11:15:31,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:31,028 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 453 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:31,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 556 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-12-15 11:15:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4576. [2021-12-15 11:15:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 1.4896174863387979) internal successors, (6815), 4575 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6815 transitions. [2021-12-15 11:15:31,162 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6815 transitions. Word has length 57 [2021-12-15 11:15:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:31,162 INFO L470 AbstractCegarLoop]: Abstraction has 4576 states and 6815 transitions. [2021-12-15 11:15:31,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6815 transitions. [2021-12-15 11:15:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 11:15:31,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:31,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:31,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:15:31,164 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1541080392, now seen corresponding path program 1 times [2021-12-15 11:15:31,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:31,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713094551] [2021-12-15 11:15:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:31,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:31,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:31,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713094551] [2021-12-15 11:15:31,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713094551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:31,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:31,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:15:31,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737509788] [2021-12-15 11:15:31,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:31,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:15:31,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:15:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:15:31,250 INFO L87 Difference]: Start difference. First operand 4576 states and 6815 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:31,528 INFO L93 Difference]: Finished difference Result 9634 states and 14112 transitions. [2021-12-15 11:15:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 11:15:31,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-15 11:15:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:31,554 INFO L225 Difference]: With dead ends: 9634 [2021-12-15 11:15:31,555 INFO L226 Difference]: Without dead ends: 9632 [2021-12-15 11:15:31,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:15:31,558 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 604 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:31,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 806 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-12-15 11:15:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2021-12-15 11:15:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 1.451703972575116) internal successors, (7199), 4959 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7199 transitions. [2021-12-15 11:15:31,765 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7199 transitions. Word has length 58 [2021-12-15 11:15:31,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:31,766 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 7199 transitions. [2021-12-15 11:15:31,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7199 transitions. [2021-12-15 11:15:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 11:15:31,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:31,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:31,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:15:31,767 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:31,768 INFO L85 PathProgramCache]: Analyzing trace with hash 581430488, now seen corresponding path program 1 times [2021-12-15 11:15:31,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408508650] [2021-12-15 11:15:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:31,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:31,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:31,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408508650] [2021-12-15 11:15:31,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408508650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:31,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:31,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:31,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080966607] [2021-12-15 11:15:31,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:31,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:31,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:31,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:31,793 INFO L87 Difference]: Start difference. First operand 4960 states and 7199 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:31,977 INFO L93 Difference]: Finished difference Result 11966 states and 17395 transitions. [2021-12-15 11:15:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-15 11:15:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:32,006 INFO L225 Difference]: With dead ends: 11966 [2021-12-15 11:15:32,007 INFO L226 Difference]: Without dead ends: 7036 [2021-12-15 11:15:32,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:32,012 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:32,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7036 states. [2021-12-15 11:15:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7036 to 7034. [2021-12-15 11:15:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7033 states have (on average 1.4458979098535476) internal successors, (10169), 7033 states have internal predecessors, (10169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10169 transitions. [2021-12-15 11:15:32,234 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10169 transitions. Word has length 59 [2021-12-15 11:15:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:32,234 INFO L470 AbstractCegarLoop]: Abstraction has 7034 states and 10169 transitions. [2021-12-15 11:15:32,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10169 transitions. [2021-12-15 11:15:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 11:15:32,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:32,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:32,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:15:32,239 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash 418253800, now seen corresponding path program 1 times [2021-12-15 11:15:32,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:32,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792481070] [2021-12-15 11:15:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:32,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:32,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792481070] [2021-12-15 11:15:32,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792481070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:15:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834036227] [2021-12-15 11:15:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:32,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:15:32,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:15:32,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:15:32,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 11:15:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:32,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 11:15:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:15:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:15:32,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:15:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:15:33,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834036227] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:15:33,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:15:33,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 16 [2021-12-15 11:15:33,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330831478] [2021-12-15 11:15:33,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:15:33,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 11:15:33,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 11:15:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-15 11:15:33,058 INFO L87 Difference]: Start difference. First operand 7034 states and 10169 transitions. Second operand has 16 states, 16 states have (on average 14.5) internal successors, (232), 16 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:38,498 INFO L93 Difference]: Finished difference Result 100692 states and 144675 transitions. [2021-12-15 11:15:38,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-15 11:15:38,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.5) internal successors, (232), 16 states have internal predecessors, (232), 0 states have call successors, (0), 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 82 [2021-12-15 11:15:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:38,683 INFO L225 Difference]: With dead ends: 100692 [2021-12-15 11:15:38,683 INFO L226 Difference]: Without dead ends: 93690 [2021-12-15 11:15:38,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4936 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2268, Invalid=9722, Unknown=0, NotChecked=0, Total=11990 [2021-12-15 11:15:38,731 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 6605 mSDsluCounter, 3648 mSDsCounter, 0 mSdLazyCounter, 2961 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6605 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 3140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:38,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6605 Valid, 4256 Invalid, 3140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2961 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 11:15:38,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93690 states. [2021-12-15 11:15:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93690 to 47770. [2021-12-15 11:15:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47770 states, 47769 states have (on average 1.4271389394795788) internal successors, (68173), 47769 states have internal predecessors, (68173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47770 states to 47770 states and 68173 transitions. [2021-12-15 11:15:40,828 INFO L78 Accepts]: Start accepts. Automaton has 47770 states and 68173 transitions. Word has length 82 [2021-12-15 11:15:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:40,828 INFO L470 AbstractCegarLoop]: Abstraction has 47770 states and 68173 transitions. [2021-12-15 11:15:40,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.5) internal successors, (232), 16 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 47770 states and 68173 transitions. [2021-12-15 11:15:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 11:15:40,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:40,835 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:15:40,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 11:15:41,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 11:15:41,043 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:41,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1918927774, now seen corresponding path program 1 times [2021-12-15 11:15:41,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:41,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062672425] [2021-12-15 11:15:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:41,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:41,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:41,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062672425] [2021-12-15 11:15:41,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062672425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:41,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:41,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:41,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520924488] [2021-12-15 11:15:41,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:41,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:41,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:41,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:41,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:41,084 INFO L87 Difference]: Start difference. First operand 47770 states and 68173 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:43,030 INFO L93 Difference]: Finished difference Result 113242 states and 161483 transitions. [2021-12-15 11:15:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-12-15 11:15:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:43,163 INFO L225 Difference]: With dead ends: 113242 [2021-12-15 11:15:43,164 INFO L226 Difference]: Without dead ends: 75644 [2021-12-15 11:15:43,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:43,198 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 69 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:43,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 272 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75644 states. [2021-12-15 11:15:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75644 to 72318. [2021-12-15 11:15:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72318 states, 72317 states have (on average 1.4112449354923462) internal successors, (102057), 72317 states have internal predecessors, (102057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72318 states to 72318 states and 102057 transitions. [2021-12-15 11:15:45,521 INFO L78 Accepts]: Start accepts. Automaton has 72318 states and 102057 transitions. Word has length 83 [2021-12-15 11:15:45,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:45,521 INFO L470 AbstractCegarLoop]: Abstraction has 72318 states and 102057 transitions. [2021-12-15 11:15:45,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 72318 states and 102057 transitions. [2021-12-15 11:15:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 11:15:45,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:45,530 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:15:45,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:15:45,530 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1917030416, now seen corresponding path program 1 times [2021-12-15 11:15:45,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:45,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147904528] [2021-12-15 11:15:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:45,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:15:45,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:45,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147904528] [2021-12-15 11:15:45,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147904528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:45,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:45,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:15:45,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136813494] [2021-12-15 11:15:45,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:45,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:15:45,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:15:45,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:15:45,571 INFO L87 Difference]: Start difference. First operand 72318 states and 102057 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:49,129 INFO L93 Difference]: Finished difference Result 164720 states and 233454 transitions. [2021-12-15 11:15:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:15:49,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 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 83 [2021-12-15 11:15:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:49,376 INFO L225 Difference]: With dead ends: 164720 [2021-12-15 11:15:49,376 INFO L226 Difference]: Without dead ends: 135038 [2021-12-15 11:15:49,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:15:49,409 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 660 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:49,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 753 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135038 states. [2021-12-15 11:15:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135038 to 96450. [2021-12-15 11:15:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96450 states, 96449 states have (on average 1.407344814357847) internal successors, (135737), 96449 states have internal predecessors, (135737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96450 states to 96450 states and 135737 transitions. [2021-12-15 11:15:53,208 INFO L78 Accepts]: Start accepts. Automaton has 96450 states and 135737 transitions. Word has length 83 [2021-12-15 11:15:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:53,208 INFO L470 AbstractCegarLoop]: Abstraction has 96450 states and 135737 transitions. [2021-12-15 11:15:53,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 96450 states and 135737 transitions. [2021-12-15 11:15:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 11:15:53,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:53,218 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:15:53,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:15:53,218 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash 841847232, now seen corresponding path program 1 times [2021-12-15 11:15:53,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:53,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794266778] [2021-12-15 11:15:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:53,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:53,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:53,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794266778] [2021-12-15 11:15:53,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794266778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:53,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:53,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:53,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131268469] [2021-12-15 11:15:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:53,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:53,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:53,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:53,243 INFO L87 Difference]: Start difference. First operand 96450 states and 135737 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:15:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:56,447 INFO L93 Difference]: Finished difference Result 151238 states and 212187 transitions. [2021-12-15 11:15:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:56,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-12-15 11:15:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:56,705 INFO L225 Difference]: With dead ends: 151238 [2021-12-15 11:15:56,705 INFO L226 Difference]: Without dead ends: 99382 [2021-12-15 11:15:56,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:56,735 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 71 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:56,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 298 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99382 states. [2021-12-15 11:15:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99382 to 96580. [2021-12-15 11:15:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96580 states, 96579 states have (on average 1.3838826245871256) internal successors, (133654), 96579 states have internal predecessors, (133654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96580 states to 96580 states and 133654 transitions. [2021-12-15 11:16:00,015 INFO L78 Accepts]: Start accepts. Automaton has 96580 states and 133654 transitions. Word has length 83 [2021-12-15 11:16:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:00,015 INFO L470 AbstractCegarLoop]: Abstraction has 96580 states and 133654 transitions. [2021-12-15 11:16:00,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand 96580 states and 133654 transitions. [2021-12-15 11:16:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 11:16:00,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:00,023 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:16:00,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:16:00,023 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash 414501168, now seen corresponding path program 1 times [2021-12-15 11:16:00,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:00,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011101301] [2021-12-15 11:16:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:00,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:00,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:00,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011101301] [2021-12-15 11:16:00,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011101301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:00,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:00,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:00,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744122179] [2021-12-15 11:16:00,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:00,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:00,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:00,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:00,051 INFO L87 Difference]: Start difference. First operand 96580 states and 133654 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:04,078 INFO L93 Difference]: Finished difference Result 208536 states and 287831 transitions. [2021-12-15 11:16:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:04,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-12-15 11:16:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:04,293 INFO L225 Difference]: With dead ends: 208536 [2021-12-15 11:16:04,293 INFO L226 Difference]: Without dead ends: 132884 [2021-12-15 11:16:04,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:04,355 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 70 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:04,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 285 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132884 states.