./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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 e328965cea0bb66eb9fefef2406463fafd513fe2a95976e689a71eb96c010564 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:34:40,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:34:40,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:34:40,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:34:40,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:34:40,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:34:40,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:34:40,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:34:40,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:34:40,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:34:40,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:34:40,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:34:40,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:34:40,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:34:40,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:34:40,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:34:40,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:34:40,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:34:40,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:34:40,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:34:40,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:34:40,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:34:40,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:34:40,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:34:40,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:34:40,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:34:40,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:34:40,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:34:40,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:34:40,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:34:40,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:34:40,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:34:40,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:34:40,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:34:40,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:34:40,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:34:40,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:34:40,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:34:40,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:34:40,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:34:40,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:34:40,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:34:40,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:34:40,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:34:40,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:34:40,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:34:40,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:34:40,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:34:40,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:34:40,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:34:40,566 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:34:40,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:34:40,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:34:40,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:34:40,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:34:40,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:34:40,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:34:40,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:34:40,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:34:40,568 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:34:40,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:34:40,568 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:34:40,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:34:40,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:34:40,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:34:40,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:34:40,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:34:40,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:34:40,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:34:40,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:34:40,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:34:40,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:34:40,571 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:34:40,572 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:34:40,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:34:40,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:34:40,572 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e328965cea0bb66eb9fefef2406463fafd513fe2a95976e689a71eb96c010564 [2021-12-15 11:34:40,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:34:40,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:34:40,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:34:40,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:34:40,843 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:34:40,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-15 11:34:40,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a61df3894/b71ba0ce4ead43ef83f89743645be9da/FLAG43e2bc2c1 [2021-12-15 11:34:41,344 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:34:41,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-15 11:34:41,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a61df3894/b71ba0ce4ead43ef83f89743645be9da/FLAG43e2bc2c1 [2021-12-15 11:34:41,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a61df3894/b71ba0ce4ead43ef83f89743645be9da [2021-12-15 11:34:41,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:34:41,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:34:41,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:34:41,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:34:41,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:34:41,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:34:41" (1/1) ... [2021-12-15 11:34:41,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575eca29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:41, skipping insertion in model container [2021-12-15 11:34:41,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:34:41" (1/1) ... [2021-12-15 11:34:41,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:34:41,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:34:41,973 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-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6636,6649] [2021-12-15 11:34:42,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:34:42,011 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:34:42,062 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-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6636,6649] [2021-12-15 11:34:42,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:34:42,102 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:34:42,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42 WrapperNode [2021-12-15 11:34:42,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:34:42,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:34:42,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:34:42,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:34:42,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,146 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 514 [2021-12-15 11:34:42,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:34:42,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:34:42,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:34:42,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:34:42,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:34:42,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:34:42,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:34:42,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:34:42,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (1/1) ... [2021-12-15 11:34:42,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:34:42,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:34:42,235 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 11:34:42,241 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 11:34:42,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:34:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:34:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:34:42,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:34:42,345 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:34:42,347 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:34:42,790 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:34:42,797 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:34:42,797 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:34:42,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:34:42 BoogieIcfgContainer [2021-12-15 11:34:42,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:34:42,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:34:42,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:34:42,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:34:42,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:34:41" (1/3) ... [2021-12-15 11:34:42,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58addc1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:34:42, skipping insertion in model container [2021-12-15 11:34:42,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:34:42" (2/3) ... [2021-12-15 11:34:42,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58addc1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:34:42, skipping insertion in model container [2021-12-15 11:34:42,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:34:42" (3/3) ... [2021-12-15 11:34:42,806 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-15 11:34:42,811 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:34:42,811 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:34:42,846 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:34:42,852 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 11:34:42,852 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:34:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 121 states have (on average 1.743801652892562) internal successors, (211), 122 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:34:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 11:34:42,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:42,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:42,874 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:42,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1503533793, now seen corresponding path program 1 times [2021-12-15 11:34:42,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:42,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921458610] [2021-12-15 11:34:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:42,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:43,201 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 11:34:43,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:43,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921458610] [2021-12-15 11:34:43,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921458610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:43,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:43,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:34:43,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262907980] [2021-12-15 11:34:43,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:43,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:34:43,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:34:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:34:43,255 INFO L87 Difference]: Start difference. First operand has 123 states, 121 states have (on average 1.743801652892562) internal successors, (211), 122 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 11:34:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:43,557 INFO L93 Difference]: Finished difference Result 588 states and 943 transitions. [2021-12-15 11:34:43,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 11:34:43,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-12-15 11:34:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:43,580 INFO L225 Difference]: With dead ends: 588 [2021-12-15 11:34:43,580 INFO L226 Difference]: Without dead ends: 518 [2021-12-15 11:34:43,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:34:43,592 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 1055 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:43,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 1117 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-12-15 11:34:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 186. [2021-12-15 11:34:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.4594594594594594) internal successors, (270), 185 states have internal predecessors, (270), 0 states have call successors, (0), 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 11:34:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2021-12-15 11:34:43,673 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 61 [2021-12-15 11:34:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:43,673 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2021-12-15 11:34:43,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 11:34:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2021-12-15 11:34:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:34:43,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:43,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:43,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:34:43,676 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash -886934908, now seen corresponding path program 1 times [2021-12-15 11:34:43,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:43,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449328911] [2021-12-15 11:34:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:43,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:43,810 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 11:34:43,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:43,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449328911] [2021-12-15 11:34:43,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449328911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:43,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:43,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:34:43,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266909810] [2021-12-15 11:34:43,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:43,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:34:43,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:43,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:34:43,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:34:43,815 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:43,937 INFO L93 Difference]: Finished difference Result 664 states and 1021 transitions. [2021-12-15 11:34:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:34:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-15 11:34:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:43,941 INFO L225 Difference]: With dead ends: 664 [2021-12-15 11:34:43,941 INFO L226 Difference]: Without dead ends: 562 [2021-12-15 11:34:43,946 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 11:34:43,948 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 608 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:43,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 760 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-15 11:34:43,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 292. [2021-12-15 11:34:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.5051546391752577) internal successors, (438), 291 states have internal predecessors, (438), 0 states have call successors, (0), 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 11:34:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 438 transitions. [2021-12-15 11:34:43,992 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 438 transitions. Word has length 63 [2021-12-15 11:34:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:43,993 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 438 transitions. [2021-12-15 11:34:43,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 438 transitions. [2021-12-15 11:34:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:34:43,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:43,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:43,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:34:43,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash 497894544, now seen corresponding path program 1 times [2021-12-15 11:34:43,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:43,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886603792] [2021-12-15 11:34:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:43,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:44,133 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 11:34:44,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:44,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886603792] [2021-12-15 11:34:44,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886603792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:44,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:44,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:34:44,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27806014] [2021-12-15 11:34:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:44,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:34:44,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:34:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:34:44,139 INFO L87 Difference]: Start difference. First operand 292 states and 438 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:44,247 INFO L93 Difference]: Finished difference Result 765 states and 1181 transitions. [2021-12-15 11:34:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:34:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-15 11:34:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:44,254 INFO L225 Difference]: With dead ends: 765 [2021-12-15 11:34:44,254 INFO L226 Difference]: Without dead ends: 663 [2021-12-15 11:34:44,257 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 11:34:44,263 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 687 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:44,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 748 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-12-15 11:34:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 443. [2021-12-15 11:34:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5316742081447965) internal successors, (677), 442 states have internal predecessors, (677), 0 states have call successors, (0), 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 11:34:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 677 transitions. [2021-12-15 11:34:44,291 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 677 transitions. Word has length 63 [2021-12-15 11:34:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:44,292 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 677 transitions. [2021-12-15 11:34:44,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 677 transitions. [2021-12-15 11:34:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:34:44,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:44,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:44,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:34:44,300 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:44,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1329115962, now seen corresponding path program 1 times [2021-12-15 11:34:44,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:44,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303815565] [2021-12-15 11:34:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:44,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:44,374 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 11:34:44,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:44,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303815565] [2021-12-15 11:34:44,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303815565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:44,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:44,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:34:44,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057709958] [2021-12-15 11:34:44,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:44,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:34:44,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:44,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:34:44,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:34:44,378 INFO L87 Difference]: Start difference. First operand 443 states and 677 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:44,442 INFO L93 Difference]: Finished difference Result 1102 states and 1714 transitions. [2021-12-15 11:34:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:34:44,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-15 11:34:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:44,448 INFO L225 Difference]: With dead ends: 1102 [2021-12-15 11:34:44,448 INFO L226 Difference]: Without dead ends: 750 [2021-12-15 11:34:44,449 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 11:34:44,450 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 68 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:44,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 380 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:34:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-12-15 11:34:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 734. [2021-12-15 11:34:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5279672578444747) internal successors, (1120), 733 states have internal predecessors, (1120), 0 states have call successors, (0), 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 11:34:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1120 transitions. [2021-12-15 11:34:44,488 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1120 transitions. Word has length 63 [2021-12-15 11:34:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:44,488 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1120 transitions. [2021-12-15 11:34:44,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1120 transitions. [2021-12-15 11:34:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:34:44,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:44,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:44,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:34:44,490 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1501695225, now seen corresponding path program 1 times [2021-12-15 11:34:44,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:44,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887814316] [2021-12-15 11:34:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:44,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:44,618 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 11:34:44,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:44,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887814316] [2021-12-15 11:34:44,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887814316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:44,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:44,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:34:44,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435479295] [2021-12-15 11:34:44,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:44,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:34:44,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:44,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:34:44,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:34:44,621 INFO L87 Difference]: Start difference. First operand 734 states and 1120 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:44,772 INFO L93 Difference]: Finished difference Result 1379 states and 2122 transitions. [2021-12-15 11:34:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:34:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-15 11:34:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:44,776 INFO L225 Difference]: With dead ends: 1379 [2021-12-15 11:34:44,776 INFO L226 Difference]: Without dead ends: 736 [2021-12-15 11:34:44,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:34:44,778 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 237 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:44,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 627 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-12-15 11:34:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 734. [2021-12-15 11:34:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5225102319236017) internal successors, (1116), 733 states have internal predecessors, (1116), 0 states have call successors, (0), 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 11:34:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1116 transitions. [2021-12-15 11:34:44,818 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1116 transitions. Word has length 63 [2021-12-15 11:34:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:44,818 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1116 transitions. [2021-12-15 11:34:44,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1116 transitions. [2021-12-15 11:34:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:34:44,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:44,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:44,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:34:44,820 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1505725276, now seen corresponding path program 1 times [2021-12-15 11:34:44,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:44,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217235430] [2021-12-15 11:34:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:44,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:44,916 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 11:34:44,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:44,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217235430] [2021-12-15 11:34:44,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217235430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:44,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:44,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:34:44,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85368178] [2021-12-15 11:34:44,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:44,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:34:44,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:34:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:34:44,919 INFO L87 Difference]: Start difference. First operand 734 states and 1116 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:45,074 INFO L93 Difference]: Finished difference Result 1494 states and 2292 transitions. [2021-12-15 11:34:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:34:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-15 11:34:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:45,092 INFO L225 Difference]: With dead ends: 1494 [2021-12-15 11:34:45,092 INFO L226 Difference]: Without dead ends: 1309 [2021-12-15 11:34:45,093 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 11:34:45,095 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 653 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:45,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 1062 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-12-15 11:34:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 928. [2021-12-15 11:34:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.528586839266451) internal successors, (1417), 927 states have internal predecessors, (1417), 0 states have call successors, (0), 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 11:34:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1417 transitions. [2021-12-15 11:34:45,143 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1417 transitions. Word has length 63 [2021-12-15 11:34:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:45,144 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1417 transitions. [2021-12-15 11:34:45,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1417 transitions. [2021-12-15 11:34:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:34:45,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:45,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:45,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:34:45,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:45,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1830608528, now seen corresponding path program 1 times [2021-12-15 11:34:45,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:45,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998938193] [2021-12-15 11:34:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:45,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:45,236 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 11:34:45,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:45,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998938193] [2021-12-15 11:34:45,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998938193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:45,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:45,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:34:45,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435242722] [2021-12-15 11:34:45,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:45,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:34:45,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:34:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:34:45,239 INFO L87 Difference]: Start difference. First operand 928 states and 1417 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:45,383 INFO L93 Difference]: Finished difference Result 1688 states and 2593 transitions. [2021-12-15 11:34:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:34:45,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-15 11:34:45,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:45,389 INFO L225 Difference]: With dead ends: 1688 [2021-12-15 11:34:45,390 INFO L226 Difference]: Without dead ends: 1503 [2021-12-15 11:34:45,391 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 11:34:45,392 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 660 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:45,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 774 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-12-15 11:34:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1122. [2021-12-15 11:34:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.5325602140945584) internal successors, (1718), 1121 states have internal predecessors, (1718), 0 states have call successors, (0), 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 11:34:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1718 transitions. [2021-12-15 11:34:45,457 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1718 transitions. Word has length 63 [2021-12-15 11:34:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:45,458 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1718 transitions. [2021-12-15 11:34:45,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 11:34:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1718 transitions. [2021-12-15 11:34:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:34:45,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:45,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:45,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:34:45,460 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1584928427, now seen corresponding path program 1 times [2021-12-15 11:34:45,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:45,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240065460] [2021-12-15 11:34:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:45,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:45,540 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 11:34:45,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:45,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240065460] [2021-12-15 11:34:45,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240065460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:45,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:45,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:34:45,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519678010] [2021-12-15 11:34:45,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:45,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:34:45,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:34:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:34:45,543 INFO L87 Difference]: Start difference. First operand 1122 states and 1718 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 11:34:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:45,689 INFO L93 Difference]: Finished difference Result 2203 states and 3391 transitions. [2021-12-15 11:34:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:34:45,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-15 11:34:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:45,694 INFO L225 Difference]: With dead ends: 2203 [2021-12-15 11:34:45,694 INFO L226 Difference]: Without dead ends: 1122 [2021-12-15 11:34:45,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:34:45,697 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 418 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:45,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 115 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-12-15 11:34:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-12-15 11:34:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.512042818911686) internal successors, (1695), 1121 states have internal predecessors, (1695), 0 states have call successors, (0), 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 11:34:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1695 transitions. [2021-12-15 11:34:45,768 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1695 transitions. Word has length 64 [2021-12-15 11:34:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:45,768 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1695 transitions. [2021-12-15 11:34:45,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 11:34:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1695 transitions. [2021-12-15 11:34:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:34:45,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:45,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:45,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:34:45,770 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:45,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash 252499052, now seen corresponding path program 1 times [2021-12-15 11:34:45,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:45,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744167911] [2021-12-15 11:34:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:45,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:45,813 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 11:34:45,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:45,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744167911] [2021-12-15 11:34:45,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744167911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:45,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:45,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:34:45,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234398038] [2021-12-15 11:34:45,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:45,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:34:45,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:45,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:34:45,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:34:45,816 INFO L87 Difference]: Start difference. First operand 1122 states and 1695 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 11:34:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:45,967 INFO L93 Difference]: Finished difference Result 2215 states and 3360 transitions. [2021-12-15 11:34:45,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:34:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-15 11:34:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:45,972 INFO L225 Difference]: With dead ends: 2215 [2021-12-15 11:34:45,972 INFO L226 Difference]: Without dead ends: 1122 [2021-12-15 11:34:45,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:34:45,974 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 445 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:45,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 91 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-12-15 11:34:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-12-15 11:34:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.4915254237288136) internal successors, (1672), 1121 states have internal predecessors, (1672), 0 states have call successors, (0), 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 11:34:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1672 transitions. [2021-12-15 11:34:46,045 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1672 transitions. Word has length 65 [2021-12-15 11:34:46,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:46,045 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1672 transitions. [2021-12-15 11:34:46,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 11:34:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1672 transitions. [2021-12-15 11:34:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:34:46,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:46,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:46,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:34:46,047 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:46,047 INFO L85 PathProgramCache]: Analyzing trace with hash 431205441, now seen corresponding path program 1 times [2021-12-15 11:34:46,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:46,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136837858] [2021-12-15 11:34:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:46,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:46,089 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 11:34:46,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:46,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136837858] [2021-12-15 11:34:46,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136837858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:46,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:46,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:34:46,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983287718] [2021-12-15 11:34:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:46,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:34:46,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:34:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:34:46,092 INFO L87 Difference]: Start difference. First operand 1122 states and 1672 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 11:34:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:46,240 INFO L93 Difference]: Finished difference Result 2211 states and 3310 transitions. [2021-12-15 11:34:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:34:46,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 11:34:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:46,244 INFO L225 Difference]: With dead ends: 2211 [2021-12-15 11:34:46,245 INFO L226 Difference]: Without dead ends: 1122 [2021-12-15 11:34:46,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:34:46,247 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 427 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:46,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 99 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:46,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-12-15 11:34:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-12-15 11:34:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.471008028545941) internal successors, (1649), 1121 states have internal predecessors, (1649), 0 states have call successors, (0), 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 11:34:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1649 transitions. [2021-12-15 11:34:46,312 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1649 transitions. Word has length 66 [2021-12-15 11:34:46,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:46,313 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1649 transitions. [2021-12-15 11:34:46,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 11:34:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1649 transitions. [2021-12-15 11:34:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:34:46,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:46,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:46,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:34:46,315 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:46,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1430381312, now seen corresponding path program 1 times [2021-12-15 11:34:46,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199224555] [2021-12-15 11:34:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:46,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:46,359 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 11:34:46,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:46,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199224555] [2021-12-15 11:34:46,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199224555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:46,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:46,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:34:46,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062716239] [2021-12-15 11:34:46,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:46,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:34:46,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:34:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:34:46,362 INFO L87 Difference]: Start difference. First operand 1122 states and 1649 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 11:34:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:46,513 INFO L93 Difference]: Finished difference Result 2207 states and 3260 transitions. [2021-12-15 11:34:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:34:46,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-15 11:34:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:46,518 INFO L225 Difference]: With dead ends: 2207 [2021-12-15 11:34:46,518 INFO L226 Difference]: Without dead ends: 1122 [2021-12-15 11:34:46,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:34:46,520 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 409 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:46,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 107 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:34:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-12-15 11:34:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-12-15 11:34:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.4504906333630687) internal successors, (1626), 1121 states have internal predecessors, (1626), 0 states have call successors, (0), 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 11:34:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1626 transitions. [2021-12-15 11:34:46,589 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1626 transitions. Word has length 67 [2021-12-15 11:34:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:46,590 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1626 transitions. [2021-12-15 11:34:46,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 11:34:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1626 transitions. [2021-12-15 11:34:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 11:34:46,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:46,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:46,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:34:46,592 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash -654863315, now seen corresponding path program 1 times [2021-12-15 11:34:46,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:46,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822645265] [2021-12-15 11:34:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:46,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:46,817 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 11:34:46,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822645265] [2021-12-15 11:34:46,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822645265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:46,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:46,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-15 11:34:46,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636357578] [2021-12-15 11:34:46,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:46,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 11:34:46,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 11:34:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:34:46,820 INFO L87 Difference]: Start difference. First operand 1122 states and 1626 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 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 11:34:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:47,504 INFO L93 Difference]: Finished difference Result 3259 states and 4738 transitions. [2021-12-15 11:34:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 11:34:47,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-15 11:34:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:47,513 INFO L225 Difference]: With dead ends: 3259 [2021-12-15 11:34:47,513 INFO L226 Difference]: Without dead ends: 2215 [2021-12-15 11:34:47,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:34:47,517 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1212 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:47,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 354 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:34:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-12-15 11:34:47,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1122. [2021-12-15 11:34:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.4487065120428189) internal successors, (1624), 1121 states have internal predecessors, (1624), 0 states have call successors, (0), 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 11:34:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1624 transitions. [2021-12-15 11:34:47,648 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1624 transitions. Word has length 68 [2021-12-15 11:34:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:47,648 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1624 transitions. [2021-12-15 11:34:47,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 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 11:34:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1624 transitions. [2021-12-15 11:34:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 11:34:47,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:47,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:47,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:34:47,650 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:47,650 INFO L85 PathProgramCache]: Analyzing trace with hash 302063151, now seen corresponding path program 1 times [2021-12-15 11:34:47,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:47,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128920477] [2021-12-15 11:34:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:47,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:47,855 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 11:34:47,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:47,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128920477] [2021-12-15 11:34:47,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128920477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:47,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:47,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-15 11:34:47,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245893904] [2021-12-15 11:34:47,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:47,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 11:34:47,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:47,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 11:34:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:34:47,857 INFO L87 Difference]: Start difference. First operand 1122 states and 1624 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 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 11:34:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:48,592 INFO L93 Difference]: Finished difference Result 3244 states and 4712 transitions. [2021-12-15 11:34:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 11:34:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-15 11:34:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:48,601 INFO L225 Difference]: With dead ends: 3244 [2021-12-15 11:34:48,602 INFO L226 Difference]: Without dead ends: 2210 [2021-12-15 11:34:48,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:34:48,605 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 836 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:48,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 484 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 11:34:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-12-15 11:34:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1122. [2021-12-15 11:34:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.4451382694023194) internal successors, (1620), 1121 states have internal predecessors, (1620), 0 states have call successors, (0), 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 11:34:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1620 transitions. [2021-12-15 11:34:48,749 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1620 transitions. Word has length 69 [2021-12-15 11:34:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:48,750 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1620 transitions. [2021-12-15 11:34:48,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 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 11:34:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1620 transitions. [2021-12-15 11:34:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 11:34:48,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:48,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:48,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:34:48,752 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash 69264625, now seen corresponding path program 1 times [2021-12-15 11:34:48,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:48,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010523279] [2021-12-15 11:34:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:48,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:48,947 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 11:34:48,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:48,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010523279] [2021-12-15 11:34:48,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010523279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:48,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:48,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-15 11:34:48,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261694859] [2021-12-15 11:34:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:48,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 11:34:48,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 11:34:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:34:48,950 INFO L87 Difference]: Start difference. First operand 1122 states and 1620 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 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 11:34:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:49,752 INFO L93 Difference]: Finished difference Result 3214 states and 4660 transitions. [2021-12-15 11:34:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 11:34:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-15 11:34:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:49,760 INFO L225 Difference]: With dead ends: 3214 [2021-12-15 11:34:49,760 INFO L226 Difference]: Without dead ends: 2200 [2021-12-15 11:34:49,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:34:49,763 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1179 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:49,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 514 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 11:34:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-12-15 11:34:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1122. [2021-12-15 11:34:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.4406779661016949) internal successors, (1615), 1121 states have internal predecessors, (1615), 0 states have call successors, (0), 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 11:34:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1615 transitions. [2021-12-15 11:34:49,900 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1615 transitions. Word has length 69 [2021-12-15 11:34:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:49,901 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1615 transitions. [2021-12-15 11:34:49,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 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 11:34:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1615 transitions. [2021-12-15 11:34:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 11:34:49,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:49,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:49,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:34:49,903 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1288867045, now seen corresponding path program 1 times [2021-12-15 11:34:49,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:49,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835979247] [2021-12-15 11:34:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:49,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:50,067 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 11:34:50,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:50,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835979247] [2021-12-15 11:34:50,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835979247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:50,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:50,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:34:50,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967207051] [2021-12-15 11:34:50,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:50,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 11:34:50,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:50,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 11:34:50,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:34:50,070 INFO L87 Difference]: Start difference. First operand 1122 states and 1615 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 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 11:34:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:50,684 INFO L93 Difference]: Finished difference Result 3185 states and 4628 transitions. [2021-12-15 11:34:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 11:34:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-12-15 11:34:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:50,693 INFO L225 Difference]: With dead ends: 3185 [2021-12-15 11:34:50,693 INFO L226 Difference]: Without dead ends: 2136 [2021-12-15 11:34:50,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-15 11:34:50,699 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 768 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:50,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 450 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:34:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-12-15 11:34:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1122. [2021-12-15 11:34:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.43978590544157) internal successors, (1614), 1121 states have internal predecessors, (1614), 0 states have call successors, (0), 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 11:34:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1614 transitions. [2021-12-15 11:34:50,868 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1614 transitions. Word has length 70 [2021-12-15 11:34:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:50,868 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1614 transitions. [2021-12-15 11:34:50,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 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 11:34:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1614 transitions. [2021-12-15 11:34:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:34:50,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:50,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:50,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:34:50,872 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash -425050317, now seen corresponding path program 1 times [2021-12-15 11:34:50,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:50,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641194341] [2021-12-15 11:34:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:50,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:51,199 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 11:34:51,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641194341] [2021-12-15 11:34:51,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641194341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:51,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:51,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-15 11:34:51,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724507584] [2021-12-15 11:34:51,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:51,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 11:34:51,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 11:34:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:34:51,201 INFO L87 Difference]: Start difference. First operand 1122 states and 1614 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 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 11:34:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:52,603 INFO L93 Difference]: Finished difference Result 4571 states and 6654 transitions. [2021-12-15 11:34:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 11:34:52,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-15 11:34:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:52,617 INFO L225 Difference]: With dead ends: 4571 [2021-12-15 11:34:52,617 INFO L226 Difference]: Without dead ends: 4176 [2021-12-15 11:34:52,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-12-15 11:34:52,619 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 1142 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:52,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 946 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:34:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-12-15 11:34:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 1101. [2021-12-15 11:34:52,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 1.44) internal successors, (1584), 1100 states have internal predecessors, (1584), 0 states have call successors, (0), 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 11:34:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1584 transitions. [2021-12-15 11:34:52,817 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1584 transitions. Word has length 71 [2021-12-15 11:34:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:52,818 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1584 transitions. [2021-12-15 11:34:52,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 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 11:34:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1584 transitions. [2021-12-15 11:34:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:34:52,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:52,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:52,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:34:52,819 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1237414452, now seen corresponding path program 1 times [2021-12-15 11:34:52,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850882763] [2021-12-15 11:34:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:52,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:53,452 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 11:34:53,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:53,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850882763] [2021-12-15 11:34:53,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850882763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:53,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:53,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-15 11:34:53,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618834856] [2021-12-15 11:34:53,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:53,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 11:34:53,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:53,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 11:34:53,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-15 11:34:53,454 INFO L87 Difference]: Start difference. First operand 1101 states and 1584 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 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 11:34:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:34:56,685 INFO L93 Difference]: Finished difference Result 7690 states and 11219 transitions. [2021-12-15 11:34:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 11:34:56,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-15 11:34:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:34:56,713 INFO L225 Difference]: With dead ends: 7690 [2021-12-15 11:34:56,713 INFO L226 Difference]: Without dead ends: 7320 [2021-12-15 11:34:56,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 11:34:56,718 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 1855 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 11:34:56,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 2530 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 11:34:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7320 states. [2021-12-15 11:34:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7320 to 1136. [2021-12-15 11:34:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.4352422907488986) internal successors, (1629), 1135 states have internal predecessors, (1629), 0 states have call successors, (0), 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 11:34:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1629 transitions. [2021-12-15 11:34:56,998 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1629 transitions. Word has length 71 [2021-12-15 11:34:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:34:56,998 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1629 transitions. [2021-12-15 11:34:56,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 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 11:34:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1629 transitions. [2021-12-15 11:34:56,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:34:56,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:34:57,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:34:57,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:34:57,000 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:34:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:34:57,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1749525204, now seen corresponding path program 1 times [2021-12-15 11:34:57,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:34:57,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939733831] [2021-12-15 11:34:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:34:57,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:34:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:34:57,552 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 11:34:57,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:34:57,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939733831] [2021-12-15 11:34:57,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939733831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:34:57,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:34:57,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-12-15 11:34:57,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450617640] [2021-12-15 11:34:57,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:34:57,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 11:34:57,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:34:57,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 11:34:57,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-12-15 11:34:57,555 INFO L87 Difference]: Start difference. First operand 1136 states and 1629 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 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 11:35:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:01,769 INFO L93 Difference]: Finished difference Result 7171 states and 10447 transitions. [2021-12-15 11:35:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-15 11:35:01,769 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-15 11:35:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:01,785 INFO L225 Difference]: With dead ends: 7171 [2021-12-15 11:35:01,785 INFO L226 Difference]: Without dead ends: 6801 [2021-12-15 11:35:01,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=446, Invalid=2634, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 11:35:01,788 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 1361 mSDsluCounter, 5418 mSDsCounter, 0 mSdLazyCounter, 3879 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 5753 SdHoareTripleChecker+Invalid, 3938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:01,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 5753 Invalid, 3938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3879 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 11:35:01,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-12-15 11:35:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 1145. [2021-12-15 11:35:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 1.4326923076923077) internal successors, (1639), 1144 states have internal predecessors, (1639), 0 states have call successors, (0), 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 11:35:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1639 transitions. [2021-12-15 11:35:02,145 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1639 transitions. Word has length 71 [2021-12-15 11:35:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:02,145 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1639 transitions. [2021-12-15 11:35:02,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 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 11:35:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1639 transitions. [2021-12-15 11:35:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:35:02,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:02,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:02,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:35:02,147 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1430628756, now seen corresponding path program 1 times [2021-12-15 11:35:02,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:02,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143854837] [2021-12-15 11:35:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:02,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:02,459 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 11:35:02,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:02,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143854837] [2021-12-15 11:35:02,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143854837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:02,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:02,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-15 11:35:02,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951916636] [2021-12-15 11:35:02,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:02,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 11:35:02,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:02,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 11:35:02,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:35:02,461 INFO L87 Difference]: Start difference. First operand 1145 states and 1639 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:04,189 INFO L93 Difference]: Finished difference Result 4594 states and 6677 transitions. [2021-12-15 11:35:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 11:35:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-15 11:35:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:04,197 INFO L225 Difference]: With dead ends: 4594 [2021-12-15 11:35:04,197 INFO L226 Difference]: Without dead ends: 4200 [2021-12-15 11:35:04,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:35:04,199 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 1200 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:04,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 1323 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:35:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-12-15 11:35:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 1115. [2021-12-15 11:35:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 1.4344703770197487) internal successors, (1598), 1114 states have internal predecessors, (1598), 0 states have call successors, (0), 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 11:35:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1598 transitions. [2021-12-15 11:35:04,566 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1598 transitions. Word has length 72 [2021-12-15 11:35:04,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:04,566 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 1598 transitions. [2021-12-15 11:35:04,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1598 transitions. [2021-12-15 11:35:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:35:04,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:04,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:04,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 11:35:04,568 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1438947915, now seen corresponding path program 1 times [2021-12-15 11:35:04,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:04,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853631204] [2021-12-15 11:35:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:04,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:04,905 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 11:35:04,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:04,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853631204] [2021-12-15 11:35:04,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853631204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:04,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:04,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-15 11:35:04,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633256128] [2021-12-15 11:35:04,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:04,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 11:35:04,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:04,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 11:35:04,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:35:04,907 INFO L87 Difference]: Start difference. First operand 1115 states and 1598 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:06,709 INFO L93 Difference]: Finished difference Result 4536 states and 6600 transitions. [2021-12-15 11:35:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 11:35:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-15 11:35:06,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:06,719 INFO L225 Difference]: With dead ends: 4536 [2021-12-15 11:35:06,719 INFO L226 Difference]: Without dead ends: 4166 [2021-12-15 11:35:06,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:35:06,722 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 775 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:06,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 1896 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:35:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-12-15 11:35:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 1088. [2021-12-15 11:35:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 1.437902483900644) internal successors, (1563), 1087 states have internal predecessors, (1563), 0 states have call successors, (0), 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 11:35:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1563 transitions. [2021-12-15 11:35:07,061 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1563 transitions. Word has length 72 [2021-12-15 11:35:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:07,062 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1563 transitions. [2021-12-15 11:35:07,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1563 transitions. [2021-12-15 11:35:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:35:07,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:07,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:07,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 11:35:07,063 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1545437633, now seen corresponding path program 1 times [2021-12-15 11:35:07,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:07,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580514196] [2021-12-15 11:35:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:07,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:07,135 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 11:35:07,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:07,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580514196] [2021-12-15 11:35:07,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580514196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:07,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:07,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:35:07,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455661312] [2021-12-15 11:35:07,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:07,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:35:07,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:07,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:35:07,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:35:07,138 INFO L87 Difference]: Start difference. First operand 1088 states and 1563 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:07,563 INFO L93 Difference]: Finished difference Result 2500 states and 3632 transitions. [2021-12-15 11:35:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:35:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-15 11:35:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:07,567 INFO L225 Difference]: With dead ends: 2500 [2021-12-15 11:35:07,567 INFO L226 Difference]: Without dead ends: 1491 [2021-12-15 11:35:07,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:35:07,569 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 72 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:07,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 353 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:35:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-12-15 11:35:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1480. [2021-12-15 11:35:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 1.4347532116294794) internal successors, (2122), 1479 states have internal predecessors, (2122), 0 states have call successors, (0), 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 11:35:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 2122 transitions. [2021-12-15 11:35:07,979 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 2122 transitions. Word has length 72 [2021-12-15 11:35:07,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:07,979 INFO L470 AbstractCegarLoop]: Abstraction has 1480 states and 2122 transitions. [2021-12-15 11:35:07,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 2122 transitions. [2021-12-15 11:35:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:35:07,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:07,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:07,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 11:35:07,981 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:07,981 INFO L85 PathProgramCache]: Analyzing trace with hash -654506813, now seen corresponding path program 1 times [2021-12-15 11:35:07,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:07,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30185796] [2021-12-15 11:35:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:07,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:08,030 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 11:35:08,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:08,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30185796] [2021-12-15 11:35:08,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30185796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:08,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:08,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:35:08,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684470574] [2021-12-15 11:35:08,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:08,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:35:08,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:35:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:35:08,032 INFO L87 Difference]: Start difference. First operand 1480 states and 2122 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:08,573 INFO L93 Difference]: Finished difference Result 2285 states and 3284 transitions. [2021-12-15 11:35:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:35:08,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-15 11:35:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:08,577 INFO L225 Difference]: With dead ends: 2285 [2021-12-15 11:35:08,577 INFO L226 Difference]: Without dead ends: 2283 [2021-12-15 11:35:08,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:35:08,578 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 140 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:08,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 603 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:35:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-12-15 11:35:09,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1490. [2021-12-15 11:35:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 1.4244459368703828) internal successors, (2121), 1489 states have internal predecessors, (2121), 0 states have call successors, (0), 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 11:35:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 2121 transitions. [2021-12-15 11:35:09,017 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 2121 transitions. Word has length 72 [2021-12-15 11:35:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:09,018 INFO L470 AbstractCegarLoop]: Abstraction has 1490 states and 2121 transitions. [2021-12-15 11:35:09,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 2121 transitions. [2021-12-15 11:35:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:35:09,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:09,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:09,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 11:35:09,019 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:09,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1371390844, now seen corresponding path program 1 times [2021-12-15 11:35:09,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:09,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933268206] [2021-12-15 11:35:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:09,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:09,533 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 11:35:09,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:09,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933268206] [2021-12-15 11:35:09,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933268206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:09,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:09,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-12-15 11:35:09,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536163883] [2021-12-15 11:35:09,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:09,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 11:35:09,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:09,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 11:35:09,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:35:09,535 INFO L87 Difference]: Start difference. First operand 1490 states and 2121 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:14,594 INFO L93 Difference]: Finished difference Result 11447 states and 16460 transitions. [2021-12-15 11:35:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 11:35:14,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-15 11:35:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:14,611 INFO L225 Difference]: With dead ends: 11447 [2021-12-15 11:35:14,612 INFO L226 Difference]: Without dead ends: 10034 [2021-12-15 11:35:14,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=1879, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 11:35:14,617 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 986 mSDsluCounter, 6381 mSDsCounter, 0 mSdLazyCounter, 4228 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 6805 SdHoareTripleChecker+Invalid, 4278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:14,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 6805 Invalid, 4278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4228 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 11:35:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10034 states. [2021-12-15 11:35:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10034 to 1511. [2021-12-15 11:35:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 1.4211920529801325) internal successors, (2146), 1510 states have internal predecessors, (2146), 0 states have call successors, (0), 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 11:35:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 2146 transitions. [2021-12-15 11:35:15,167 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 2146 transitions. Word has length 72 [2021-12-15 11:35:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:15,167 INFO L470 AbstractCegarLoop]: Abstraction has 1511 states and 2146 transitions. [2021-12-15 11:35:15,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 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 11:35:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 2146 transitions. [2021-12-15 11:35:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 11:35:15,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:15,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:15,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 11:35:15,169 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:15,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1818615628, now seen corresponding path program 1 times [2021-12-15 11:35:15,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:15,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020786169] [2021-12-15 11:35:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:15,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:15,449 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 11:35:15,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:15,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020786169] [2021-12-15 11:35:15,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020786169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:15,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:15,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-15 11:35:15,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247696247] [2021-12-15 11:35:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:15,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 11:35:15,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:15,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 11:35:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:35:15,451 INFO L87 Difference]: Start difference. First operand 1511 states and 2146 transitions. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 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 11:35:17,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:17,932 INFO L93 Difference]: Finished difference Result 6319 states and 9073 transitions. [2021-12-15 11:35:17,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 11:35:17,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-12-15 11:35:17,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:17,942 INFO L225 Difference]: With dead ends: 6319 [2021-12-15 11:35:17,943 INFO L226 Difference]: Without dead ends: 5754 [2021-12-15 11:35:17,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:35:17,946 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 1182 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:17,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 1518 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:35:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5754 states. [2021-12-15 11:35:18,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5754 to 1491. [2021-12-15 11:35:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 1.423489932885906) internal successors, (2121), 1490 states have internal predecessors, (2121), 0 states have call successors, (0), 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 11:35:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2121 transitions. [2021-12-15 11:35:18,524 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2121 transitions. Word has length 73 [2021-12-15 11:35:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:18,524 INFO L470 AbstractCegarLoop]: Abstraction has 1491 states and 2121 transitions. [2021-12-15 11:35:18,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 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 11:35:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2121 transitions. [2021-12-15 11:35:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 11:35:18,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:18,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:18,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 11:35:18,527 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:18,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2048576078, now seen corresponding path program 1 times [2021-12-15 11:35:18,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:18,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640610789] [2021-12-15 11:35:18,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:18,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:35:18,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:18,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640610789] [2021-12-15 11:35:18,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640610789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:18,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:18,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:35:18,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953379729] [2021-12-15 11:35:18,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:18,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:35:18,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:35:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:35:18,592 INFO L87 Difference]: Start difference. First operand 1491 states and 2121 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:35:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:20,659 INFO L93 Difference]: Finished difference Result 7321 states and 10447 transitions. [2021-12-15 11:35:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:35:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-15 11:35:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:20,666 INFO L225 Difference]: With dead ends: 7321 [2021-12-15 11:35:20,667 INFO L226 Difference]: Without dead ends: 5910 [2021-12-15 11:35:20,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:35:20,670 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1076 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:20,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 302 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:35:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2021-12-15 11:35:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 3210. [2021-12-15 11:35:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 1.4300405110626364) internal successors, (4589), 3209 states have internal predecessors, (4589), 0 states have call successors, (0), 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 11:35:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 4589 transitions. [2021-12-15 11:35:21,587 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 4589 transitions. Word has length 98 [2021-12-15 11:35:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:21,588 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 4589 transitions. [2021-12-15 11:35:21,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:35:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 4589 transitions. [2021-12-15 11:35:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 11:35:21,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:21,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:21,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 11:35:21,590 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1823822764, now seen corresponding path program 1 times [2021-12-15 11:35:21,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:21,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887163251] [2021-12-15 11:35:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:21,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:35:21,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:21,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887163251] [2021-12-15 11:35:21,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887163251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:21,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:21,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:35:21,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921983299] [2021-12-15 11:35:21,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:21,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:35:21,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:21,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:35:21,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:35:21,653 INFO L87 Difference]: Start difference. First operand 3210 states and 4589 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:35:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:24,972 INFO L93 Difference]: Finished difference Result 14338 states and 20579 transitions. [2021-12-15 11:35:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:35:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-15 11:35:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:24,985 INFO L225 Difference]: With dead ends: 14338 [2021-12-15 11:35:24,985 INFO L226 Difference]: Without dead ends: 11208 [2021-12-15 11:35:24,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:35:24,993 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1251 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:24,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 296 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:35:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2021-12-15 11:35:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 6958. [2021-12-15 11:35:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6958 states, 6957 states have (on average 1.4315078338364238) internal successors, (9959), 6957 states have internal predecessors, (9959), 0 states have call successors, (0), 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 11:35:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 9959 transitions. [2021-12-15 11:35:26,916 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 9959 transitions. Word has length 98 [2021-12-15 11:35:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:26,916 INFO L470 AbstractCegarLoop]: Abstraction has 6958 states and 9959 transitions. [2021-12-15 11:35:26,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:35:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 9959 transitions. [2021-12-15 11:35:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 11:35:26,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:26,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:26,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 11:35:26,919 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash -362244390, now seen corresponding path program 1 times [2021-12-15 11:35:26,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:26,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880507778] [2021-12-15 11:35:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:26,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:35:26,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880507778] [2021-12-15 11:35:26,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880507778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:26,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:26,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:35:26,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133355690] [2021-12-15 11:35:26,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:26,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:35:26,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:26,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:35:26,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:35:26,981 INFO L87 Difference]: Start difference. First operand 6958 states and 9959 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:35:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:32,097 INFO L93 Difference]: Finished difference Result 24564 states and 35281 transitions. [2021-12-15 11:35:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:35:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-15 11:35:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:32,118 INFO L225 Difference]: With dead ends: 24564 [2021-12-15 11:35:32,118 INFO L226 Difference]: Without dead ends: 17686 [2021-12-15 11:35:32,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:35:32,126 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 989 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:32,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 372 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:35:32,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17686 states. [2021-12-15 11:35:35,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17686 to 10648. [2021-12-15 11:35:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10648 states, 10647 states have (on average 1.4352399737015122) internal successors, (15281), 10647 states have internal predecessors, (15281), 0 states have call successors, (0), 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 11:35:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10648 states to 10648 states and 15281 transitions. [2021-12-15 11:35:35,094 INFO L78 Accepts]: Start accepts. Automaton has 10648 states and 15281 transitions. Word has length 98 [2021-12-15 11:35:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:35,094 INFO L470 AbstractCegarLoop]: Abstraction has 10648 states and 15281 transitions. [2021-12-15 11:35:35,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:35:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 10648 states and 15281 transitions. [2021-12-15 11:35:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 11:35:35,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:35,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:35,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 11:35:35,097 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:35,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1915666314, now seen corresponding path program 1 times [2021-12-15 11:35:35,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:35,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253792847] [2021-12-15 11:35:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:35,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:35:35,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:35,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253792847] [2021-12-15 11:35:35,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253792847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:35,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:35,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:35:35,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502874451] [2021-12-15 11:35:35,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:35,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:35:35,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:35,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:35:35,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:35:35,133 INFO L87 Difference]: Start difference. First operand 10648 states and 15281 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:35:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:35:37,915 INFO L93 Difference]: Finished difference Result 18788 states and 26987 transitions. [2021-12-15 11:35:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:35:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-15 11:35:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:35:37,929 INFO L225 Difference]: With dead ends: 18788 [2021-12-15 11:35:37,930 INFO L226 Difference]: Without dead ends: 10165 [2021-12-15 11:35:37,937 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 11:35:37,938 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 65 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:35:37,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 320 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:35:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10165 states. [2021-12-15 11:35:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10165 to 10163. [2021-12-15 11:35:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 1.4212753395000983) internal successors, (14443), 10162 states have internal predecessors, (14443), 0 states have call successors, (0), 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 11:35:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 14443 transitions. [2021-12-15 11:35:40,720 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 14443 transitions. Word has length 98 [2021-12-15 11:35:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:35:40,720 INFO L470 AbstractCegarLoop]: Abstraction has 10163 states and 14443 transitions. [2021-12-15 11:35:40,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 11:35:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 14443 transitions. [2021-12-15 11:35:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 11:35:40,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:35:40,725 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:35:40,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 11:35:40,725 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:35:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:35:40,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2121849076, now seen corresponding path program 1 times [2021-12-15 11:35:40,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:35:40,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607038376] [2021-12-15 11:35:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:35:40,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:35:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:35:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 11:35:40,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:35:40,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607038376] [2021-12-15 11:35:40,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607038376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:35:40,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:35:40,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:35:40,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114716057] [2021-12-15 11:35:40,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:35:40,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:35:40,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:35:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:35:40,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:35:40,782 INFO L87 Difference]: Start difference. First operand 10163 states and 14443 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)