./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 252cd4a0f8e1adbe16c63dba2a525d461eb83ddbfd931d93e6b7ef83b52daaf7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:31:05,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:31:05,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:31:05,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:31:05,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:31:05,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:31:05,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:31:05,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:31:05,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:31:05,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:31:05,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:31:05,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:31:05,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:31:05,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:31:05,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:31:05,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:31:05,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:31:05,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:31:05,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:31:05,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:31:05,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:31:05,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:31:05,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:31:05,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:31:05,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:31:05,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:31:05,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:31:05,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:31:05,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:31:05,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:31:05,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:31:05,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:31:05,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:31:05,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:31:05,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:31:05,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:31:05,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:31:05,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:31:05,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:31:05,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:31:05,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:31:05,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:31:05,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:31:05,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:31:05,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:31:05,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:31:05,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:31:05,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:31:05,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:31:05,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:31:05,712 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:31:05,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:31:05,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:31:05,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:31:05,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:31:05,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:31:05,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:31:05,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:31:05,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:31:05,714 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:31:05,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:31:05,714 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:31:05,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:31:05,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:31:05,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:31:05,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:31:05,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:31:05,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:31:05,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:31:05,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:31:05,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:31:05,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:31:05,716 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:31:05,717 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:31:05,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:31:05,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:31:05,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 252cd4a0f8e1adbe16c63dba2a525d461eb83ddbfd931d93e6b7ef83b52daaf7 [2021-12-21 13:31:05,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:31:05,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:31:05,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:31:05,932 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:31:05,939 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:31:05,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c [2021-12-21 13:31:06,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e661e0c/f2ca64dae1da4d2a8d2cd4a2022d08b1/FLAG8b64137af [2021-12-21 13:31:06,326 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:31:06,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c [2021-12-21 13:31:06,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e661e0c/f2ca64dae1da4d2a8d2cd4a2022d08b1/FLAG8b64137af [2021-12-21 13:31:06,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e661e0c/f2ca64dae1da4d2a8d2cd4a2022d08b1 [2021-12-21 13:31:06,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:31:06,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:31:06,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:31:06,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:31:06,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:31:06,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:31:06" (1/1) ... [2021-12-21 13:31:06,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a771a2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:06, skipping insertion in model container [2021-12-21 13:31:06,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:31:06" (1/1) ... [2021-12-21 13:31:06,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:31:06,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:31:06,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c[20056,20069] [2021-12-21 13:31:06,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:31:06,987 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:31:07,032 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c[20056,20069] [2021-12-21 13:31:07,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:31:07,043 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:31:07,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07 WrapperNode [2021-12-21 13:31:07,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:31:07,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:31:07,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:31:07,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:31:07,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,084 INFO L137 Inliner]: procedures = 26, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 454 [2021-12-21 13:31:07,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:31:07,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:31:07,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:31:07,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:31:07,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:31:07,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:31:07,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:31:07,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:31:07,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (1/1) ... [2021-12-21 13:31:07,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:31:07,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:31:07,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 13:31:07,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 13:31:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:31:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:31:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:31:07,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:31:07,245 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:31:07,247 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:31:07,565 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:31:07,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:31:07,571 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:31:07,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:31:07 BoogieIcfgContainer [2021-12-21 13:31:07,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:31:07,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:31:07,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:31:07,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:31:07,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:31:06" (1/3) ... [2021-12-21 13:31:07,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461d86c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:31:07, skipping insertion in model container [2021-12-21 13:31:07,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:31:07" (2/3) ... [2021-12-21 13:31:07,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461d86c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:31:07, skipping insertion in model container [2021-12-21 13:31:07,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:31:07" (3/3) ... [2021-12-21 13:31:07,578 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c [2021-12-21 13:31:07,582 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:31:07,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:31:07,613 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:31:07,618 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 13:31:07,618 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:31:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 126 states have (on average 1.753968253968254) internal successors, (221), 127 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:07,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 13:31:07,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:07,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:07,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:07,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1781508813, now seen corresponding path program 1 times [2021-12-21 13:31:07,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:07,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174013345] [2021-12-21 13:31:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:07,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:07,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:07,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174013345] [2021-12-21 13:31:07,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174013345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:07,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:07,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:31:07,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132529813] [2021-12-21 13:31:07,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:07,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:31:07,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:07,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:31:07,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:31:07,854 INFO L87 Difference]: Start difference. First operand has 128 states, 126 states have (on average 1.753968253968254) internal successors, (221), 127 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:07,871 INFO L93 Difference]: Finished difference Result 201 states and 336 transitions. [2021-12-21 13:31:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:31:07,873 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-21 13:31:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:07,879 INFO L225 Difference]: With dead ends: 201 [2021-12-21 13:31:07,879 INFO L226 Difference]: Without dead ends: 124 [2021-12-21 13:31:07,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:31:07,884 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:07,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-21 13:31:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-21 13:31:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.7398373983739837) internal successors, (214), 123 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2021-12-21 13:31:07,913 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 41 [2021-12-21 13:31:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:07,913 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2021-12-21 13:31:07,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2021-12-21 13:31:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 13:31:07,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:07,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:07,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:31:07,915 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:07,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:07,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2119091697, now seen corresponding path program 1 times [2021-12-21 13:31:07,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:07,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999114934] [2021-12-21 13:31:07,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:07,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:07,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:07,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999114934] [2021-12-21 13:31:07,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999114934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:07,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:07,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:31:07,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448201366] [2021-12-21 13:31:07,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:07,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:31:07,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:31:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:31:07,998 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:08,092 INFO L93 Difference]: Finished difference Result 196 states and 326 transitions. [2021-12-21 13:31:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:31:08,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-21 13:31:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:08,098 INFO L225 Difference]: With dead ends: 196 [2021-12-21 13:31:08,099 INFO L226 Difference]: Without dead ends: 124 [2021-12-21 13:31:08,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:31:08,101 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 3 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:08,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 795 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-21 13:31:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-21 13:31:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3333333333333333) internal successors, (164), 123 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2021-12-21 13:31:08,114 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 41 [2021-12-21 13:31:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:08,115 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2021-12-21 13:31:08,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2021-12-21 13:31:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:31:08,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:08,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:08,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:31:08,122 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1557003755, now seen corresponding path program 1 times [2021-12-21 13:31:08,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:08,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772006733] [2021-12-21 13:31:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:08,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:08,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:08,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772006733] [2021-12-21 13:31:08,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772006733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:08,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:08,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:08,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660883537] [2021-12-21 13:31:08,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:08,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:08,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:08,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:08,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,266 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:08,282 INFO L93 Difference]: Finished difference Result 254 states and 370 transitions. [2021-12-21 13:31:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 13:31:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:08,284 INFO L225 Difference]: With dead ends: 254 [2021-12-21 13:31:08,285 INFO L226 Difference]: Without dead ends: 186 [2021-12-21 13:31:08,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,286 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 98 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:08,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 364 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-21 13:31:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-12-21 13:31:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.4207650273224044) internal successors, (260), 183 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 260 transitions. [2021-12-21 13:31:08,298 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 260 transitions. Word has length 90 [2021-12-21 13:31:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:08,298 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 260 transitions. [2021-12-21 13:31:08,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 260 transitions. [2021-12-21 13:31:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:31:08,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:08,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:08,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:31:08,300 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:08,301 INFO L85 PathProgramCache]: Analyzing trace with hash -309494901, now seen corresponding path program 1 times [2021-12-21 13:31:08,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:08,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918619519] [2021-12-21 13:31:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:08,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:08,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918619519] [2021-12-21 13:31:08,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918619519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:08,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:08,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:08,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856701863] [2021-12-21 13:31:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:08,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:08,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,360 INFO L87 Difference]: Start difference. First operand 184 states and 260 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:08,383 INFO L93 Difference]: Finished difference Result 428 states and 648 transitions. [2021-12-21 13:31:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 13:31:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:08,388 INFO L225 Difference]: With dead ends: 428 [2021-12-21 13:31:08,388 INFO L226 Difference]: Without dead ends: 300 [2021-12-21 13:31:08,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,396 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 94 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:08,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 363 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-21 13:31:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2021-12-21 13:31:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.4848484848484849) internal successors, (441), 297 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 441 transitions. [2021-12-21 13:31:08,414 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 441 transitions. Word has length 90 [2021-12-21 13:31:08,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:08,414 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 441 transitions. [2021-12-21 13:31:08,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 441 transitions. [2021-12-21 13:31:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:31:08,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:08,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:08,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:31:08,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1050927103, now seen corresponding path program 1 times [2021-12-21 13:31:08,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:08,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577504040] [2021-12-21 13:31:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:08,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:08,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:08,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577504040] [2021-12-21 13:31:08,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577504040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:08,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:08,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:08,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094075076] [2021-12-21 13:31:08,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:08,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:08,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:08,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,542 INFO L87 Difference]: Start difference. First operand 298 states and 441 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:08,576 INFO L93 Difference]: Finished difference Result 758 states and 1171 transitions. [2021-12-21 13:31:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 13:31:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:08,578 INFO L225 Difference]: With dead ends: 758 [2021-12-21 13:31:08,578 INFO L226 Difference]: Without dead ends: 516 [2021-12-21 13:31:08,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,580 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 90 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:08,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 362 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-21 13:31:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 514. [2021-12-21 13:31:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.5224171539961013) internal successors, (781), 513 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 781 transitions. [2021-12-21 13:31:08,620 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 781 transitions. Word has length 90 [2021-12-21 13:31:08,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:08,621 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 781 transitions. [2021-12-21 13:31:08,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,623 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 781 transitions. [2021-12-21 13:31:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:31:08,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:08,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:08,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:31:08,628 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1796509833, now seen corresponding path program 1 times [2021-12-21 13:31:08,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:08,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611580953] [2021-12-21 13:31:08,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:08,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:08,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:08,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611580953] [2021-12-21 13:31:08,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611580953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:08,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:08,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:08,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468772568] [2021-12-21 13:31:08,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:08,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:08,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,697 INFO L87 Difference]: Start difference. First operand 514 states and 781 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:08,729 INFO L93 Difference]: Finished difference Result 1382 states and 2151 transitions. [2021-12-21 13:31:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:08,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 13:31:08,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:08,734 INFO L225 Difference]: With dead ends: 1382 [2021-12-21 13:31:08,734 INFO L226 Difference]: Without dead ends: 924 [2021-12-21 13:31:08,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,736 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 86 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:08,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 361 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-12-21 13:31:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 922. [2021-12-21 13:31:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.5385450597176982) internal successors, (1417), 921 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) [2021-12-21 13:31:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1417 transitions. [2021-12-21 13:31:08,771 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1417 transitions. Word has length 90 [2021-12-21 13:31:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:08,772 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1417 transitions. [2021-12-21 13:31:08,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1417 transitions. [2021-12-21 13:31:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:31:08,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:08,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:08,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:31:08,774 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:08,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:08,775 INFO L85 PathProgramCache]: Analyzing trace with hash -259221845, now seen corresponding path program 1 times [2021-12-21 13:31:08,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:08,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837678149] [2021-12-21 13:31:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:08,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:08,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:08,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837678149] [2021-12-21 13:31:08,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837678149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:08,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:08,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:08,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451468570] [2021-12-21 13:31:08,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:08,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:08,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,832 INFO L87 Difference]: Start difference. First operand 922 states and 1417 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:08,885 INFO L93 Difference]: Finished difference Result 2558 states and 3979 transitions. [2021-12-21 13:31:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 13:31:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:08,891 INFO L225 Difference]: With dead ends: 2558 [2021-12-21 13:31:08,891 INFO L226 Difference]: Without dead ends: 1692 [2021-12-21 13:31:08,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:08,893 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 82 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:08,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 360 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-12-21 13:31:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1690. [2021-12-21 13:31:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.5399644760213145) internal successors, (2601), 1689 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2601 transitions. [2021-12-21 13:31:08,941 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2601 transitions. Word has length 90 [2021-12-21 13:31:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:08,941 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2601 transitions. [2021-12-21 13:31:08,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2601 transitions. [2021-12-21 13:31:08,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:31:08,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:08,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:08,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:31:08,943 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:08,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1420392415, now seen corresponding path program 1 times [2021-12-21 13:31:08,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:08,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972142869] [2021-12-21 13:31:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:08,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:08,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:08,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972142869] [2021-12-21 13:31:08,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972142869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:08,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:08,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:08,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797087747] [2021-12-21 13:31:08,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:09,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:09,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:09,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:09,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:09,001 INFO L87 Difference]: Start difference. First operand 1690 states and 2601 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:09,105 INFO L93 Difference]: Finished difference Result 4766 states and 7371 transitions. [2021-12-21 13:31:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 13:31:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:09,116 INFO L225 Difference]: With dead ends: 4766 [2021-12-21 13:31:09,116 INFO L226 Difference]: Without dead ends: 3132 [2021-12-21 13:31:09,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:09,119 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 78 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:09,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 359 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-12-21 13:31:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3130. [2021-12-21 13:31:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3130 states, 3129 states have (on average 1.531799296899968) internal successors, (4793), 3129 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4793 transitions. [2021-12-21 13:31:09,262 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4793 transitions. Word has length 90 [2021-12-21 13:31:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:09,263 INFO L470 AbstractCegarLoop]: Abstraction has 3130 states and 4793 transitions. [2021-12-21 13:31:09,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4793 transitions. [2021-12-21 13:31:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:31:09,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:09,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:09,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:31:09,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:09,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:09,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1758185557, now seen corresponding path program 1 times [2021-12-21 13:31:09,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:09,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723655891] [2021-12-21 13:31:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:09,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:09,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:09,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723655891] [2021-12-21 13:31:09,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723655891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:09,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:09,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:09,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236807294] [2021-12-21 13:31:09,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:09,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:09,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:09,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:09,346 INFO L87 Difference]: Start difference. First operand 3130 states and 4793 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:09,494 INFO L93 Difference]: Finished difference Result 8894 states and 13627 transitions. [2021-12-21 13:31:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:09,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 13:31:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:09,511 INFO L225 Difference]: With dead ends: 8894 [2021-12-21 13:31:09,512 INFO L226 Difference]: Without dead ends: 5820 [2021-12-21 13:31:09,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:09,515 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 74 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:09,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 358 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-12-21 13:31:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5818. [2021-12-21 13:31:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 5817 states have (on average 1.5171050369606327) internal successors, (8825), 5817 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 8825 transitions. [2021-12-21 13:31:09,706 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 8825 transitions. Word has length 90 [2021-12-21 13:31:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:09,706 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 8825 transitions. [2021-12-21 13:31:09,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 8825 transitions. [2021-12-21 13:31:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:31:09,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:09,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:09,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:31:09,708 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1318796341, now seen corresponding path program 1 times [2021-12-21 13:31:09,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:09,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592756146] [2021-12-21 13:31:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:09,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:09,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:09,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592756146] [2021-12-21 13:31:09,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592756146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:09,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:09,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:31:09,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198196032] [2021-12-21 13:31:09,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:09,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:31:09,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:09,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:31:09,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:31:09,815 INFO L87 Difference]: Start difference. First operand 5818 states and 8825 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:12,433 INFO L93 Difference]: Finished difference Result 86486 states and 131591 transitions. [2021-12-21 13:31:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 13:31:12,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 13:31:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:12,623 INFO L225 Difference]: With dead ends: 86486 [2021-12-21 13:31:12,624 INFO L226 Difference]: Without dead ends: 80724 [2021-12-21 13:31:12,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-21 13:31:12,656 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 3049 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3049 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:12,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3049 Valid, 1799 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80724 states. [2021-12-21 13:31:13,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80724 to 11578. [2021-12-21 13:31:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.4975382223373932) internal successors, (17337), 11577 states have internal predecessors, (17337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 17337 transitions. [2021-12-21 13:31:13,764 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 17337 transitions. Word has length 90 [2021-12-21 13:31:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:13,764 INFO L470 AbstractCegarLoop]: Abstraction has 11578 states and 17337 transitions. [2021-12-21 13:31:13,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 17337 transitions. [2021-12-21 13:31:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:31:13,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:13,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:13,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:31:13,766 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1697127869, now seen corresponding path program 1 times [2021-12-21 13:31:13,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:13,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996560658] [2021-12-21 13:31:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:13,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:14,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:14,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996560658] [2021-12-21 13:31:14,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996560658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:14,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:14,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:31:14,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124632117] [2021-12-21 13:31:14,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:14,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:31:14,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:14,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:31:14,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:31:14,077 INFO L87 Difference]: Start difference. First operand 11578 states and 17337 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:14,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:14,986 INFO L93 Difference]: Finished difference Result 23102 states and 34619 transitions. [2021-12-21 13:31:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:31:14,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-21 13:31:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:15,006 INFO L225 Difference]: With dead ends: 23102 [2021-12-21 13:31:15,007 INFO L226 Difference]: Without dead ends: 11580 [2021-12-21 13:31:15,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:31:15,023 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 749 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:15,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 785 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11580 states. [2021-12-21 13:31:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11580 to 11578. [2021-12-21 13:31:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.4864818173965622) internal successors, (17209), 11577 states have internal predecessors, (17209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 17209 transitions. [2021-12-21 13:31:15,840 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 17209 transitions. Word has length 92 [2021-12-21 13:31:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:15,840 INFO L470 AbstractCegarLoop]: Abstraction has 11578 states and 17209 transitions. [2021-12-21 13:31:15,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 17209 transitions. [2021-12-21 13:31:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:31:15,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:15,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:15,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:31:15,842 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:15,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1763621381, now seen corresponding path program 1 times [2021-12-21 13:31:15,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:15,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655300376] [2021-12-21 13:31:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:15,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:15,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:15,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655300376] [2021-12-21 13:31:15,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655300376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:15,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:15,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:31:15,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424197376] [2021-12-21 13:31:15,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:15,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:31:15,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:15,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:31:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:15,882 INFO L87 Difference]: Start difference. First operand 11578 states and 17209 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:16,802 INFO L93 Difference]: Finished difference Result 28544 states and 42429 transitions. [2021-12-21 13:31:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:31:16,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-21 13:31:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:16,832 INFO L225 Difference]: With dead ends: 28544 [2021-12-21 13:31:16,832 INFO L226 Difference]: Without dead ends: 17022 [2021-12-21 13:31:16,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:31:16,851 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 66 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:16,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 314 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17022 states. [2021-12-21 13:31:17,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17022 to 17020. [2021-12-21 13:31:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.473823373876256) internal successors, (25083), 17019 states have internal predecessors, (25083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 25083 transitions. [2021-12-21 13:31:17,784 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 25083 transitions. Word has length 92 [2021-12-21 13:31:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:17,785 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 25083 transitions. [2021-12-21 13:31:17,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 25083 transitions. [2021-12-21 13:31:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 13:31:17,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:17,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:17,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:31:17,786 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1486079254, now seen corresponding path program 1 times [2021-12-21 13:31:17,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:17,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432244436] [2021-12-21 13:31:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:17,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:17,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:17,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432244436] [2021-12-21 13:31:17,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432244436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:17,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:17,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:31:17,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180189739] [2021-12-21 13:31:17,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:17,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:31:17,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:31:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:31:17,848 INFO L87 Difference]: Start difference. First operand 17020 states and 25083 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:18,890 INFO L93 Difference]: Finished difference Result 33982 states and 50108 transitions. [2021-12-21 13:31:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:31:18,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 13:31:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:18,916 INFO L225 Difference]: With dead ends: 33982 [2021-12-21 13:31:18,916 INFO L226 Difference]: Without dead ends: 17020 [2021-12-21 13:31:18,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:31:18,930 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 525 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:18,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 190 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-12-21 13:31:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 17020. [2021-12-21 13:31:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.4625418649744404) internal successors, (24891), 17019 states have internal predecessors, (24891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 24891 transitions. [2021-12-21 13:31:19,953 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 24891 transitions. Word has length 93 [2021-12-21 13:31:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:19,954 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 24891 transitions. [2021-12-21 13:31:19,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 24891 transitions. [2021-12-21 13:31:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 13:31:19,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:19,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:19,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:31:19,955 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:19,955 INFO L85 PathProgramCache]: Analyzing trace with hash 202864488, now seen corresponding path program 1 times [2021-12-21 13:31:19,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:19,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024859023] [2021-12-21 13:31:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:19,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:20,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:20,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024859023] [2021-12-21 13:31:20,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024859023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:20,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:20,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:31:20,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349646173] [2021-12-21 13:31:20,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:20,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:31:20,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:31:20,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:31:20,004 INFO L87 Difference]: Start difference. First operand 17020 states and 24891 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:21,384 INFO L93 Difference]: Finished difference Result 33982 states and 49724 transitions. [2021-12-21 13:31:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:31:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 13:31:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:21,408 INFO L225 Difference]: With dead ends: 33982 [2021-12-21 13:31:21,408 INFO L226 Difference]: Without dead ends: 17020 [2021-12-21 13:31:21,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:31:21,428 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 557 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:21,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 195 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-12-21 13:31:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 17020. [2021-12-21 13:31:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.4512603560726247) internal successors, (24699), 17019 states have internal predecessors, (24699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 24699 transitions. [2021-12-21 13:31:22,553 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 24699 transitions. Word has length 93 [2021-12-21 13:31:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:22,554 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 24699 transitions. [2021-12-21 13:31:22,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:22,554 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 24699 transitions. [2021-12-21 13:31:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 13:31:22,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:22,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:22,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:31:22,555 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2008302822, now seen corresponding path program 1 times [2021-12-21 13:31:22,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:22,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936895843] [2021-12-21 13:31:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:22,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:31:22,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:22,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936895843] [2021-12-21 13:31:22,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936895843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:22,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:22,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:31:22,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637381070] [2021-12-21 13:31:22,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:22,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:31:22,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:22,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:31:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:31:22,611 INFO L87 Difference]: Start difference. First operand 17020 states and 24699 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:24,848 INFO L93 Difference]: Finished difference Result 31519 states and 45297 transitions. [2021-12-21 13:31:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:31:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 13:31:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:24,890 INFO L225 Difference]: With dead ends: 31519 [2021-12-21 13:31:24,890 INFO L226 Difference]: Without dead ends: 31517 [2021-12-21 13:31:24,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:31:24,898 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 289 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:24,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 676 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:31:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31517 states. [2021-12-21 13:31:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31517 to 17788. [2021-12-21 13:31:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17788 states, 17787 states have (on average 1.4281778827233373) internal successors, (25403), 17787 states have internal predecessors, (25403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17788 states to 17788 states and 25403 transitions. [2021-12-21 13:31:26,213 INFO L78 Accepts]: Start accepts. Automaton has 17788 states and 25403 transitions. Word has length 93 [2021-12-21 13:31:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 17788 states and 25403 transitions. [2021-12-21 13:31:26,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 17788 states and 25403 transitions. [2021-12-21 13:31:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-21 13:31:26,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:26,222 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:26,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:31:26,222 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:26,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1787662099, now seen corresponding path program 1 times [2021-12-21 13:31:26,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:26,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578256400] [2021-12-21 13:31:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:26,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 13:31:26,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:26,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578256400] [2021-12-21 13:31:26,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578256400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:26,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:26,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:31:26,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389847414] [2021-12-21 13:31:26,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:26,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:31:26,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:31:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:31:26,295 INFO L87 Difference]: Start difference. First operand 17788 states and 25403 transitions. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:35,033 INFO L93 Difference]: Finished difference Result 145356 states and 207555 transitions. [2021-12-21 13:31:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:31:35,034 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 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 129 [2021-12-21 13:31:35,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:35,375 INFO L225 Difference]: With dead ends: 145356 [2021-12-21 13:31:35,375 INFO L226 Difference]: Without dead ends: 127626 [2021-12-21 13:31:35,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-21 13:31:35,414 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 2142 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2142 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:35,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2142 Valid, 1211 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127626 states. [2021-12-21 13:31:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127626 to 35516. [2021-12-21 13:31:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35516 states, 35515 states have (on average 1.4234830353371815) internal successors, (50555), 35515 states have internal predecessors, (50555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35516 states to 35516 states and 50555 transitions. [2021-12-21 13:31:39,198 INFO L78 Accepts]: Start accepts. Automaton has 35516 states and 50555 transitions. Word has length 129 [2021-12-21 13:31:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:31:39,198 INFO L470 AbstractCegarLoop]: Abstraction has 35516 states and 50555 transitions. [2021-12-21 13:31:39,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 35516 states and 50555 transitions. [2021-12-21 13:31:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-21 13:31:39,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:31:39,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:31:39,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:31:39,210 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:31:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:31:39,210 INFO L85 PathProgramCache]: Analyzing trace with hash 18879283, now seen corresponding path program 1 times [2021-12-21 13:31:39,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:31:39,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760529579] [2021-12-21 13:31:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:31:39,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:31:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:31:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:31:39,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:31:39,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760529579] [2021-12-21 13:31:39,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760529579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:31:39,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:31:39,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:31:39,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044332379] [2021-12-21 13:31:39,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:31:39,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:31:39,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:31:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:31:39,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:31:39,280 INFO L87 Difference]: Start difference. First operand 35516 states and 50555 transitions. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:31:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:31:50,227 INFO L93 Difference]: Finished difference Result 163084 states and 232707 transitions. [2021-12-21 13:31:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:31:50,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 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 129 [2021-12-21 13:31:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:31:50,443 INFO L225 Difference]: With dead ends: 163084 [2021-12-21 13:31:50,443 INFO L226 Difference]: Without dead ends: 145354 [2021-12-21 13:31:50,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-21 13:31:50,480 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 1893 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1893 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:31:50,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1893 Valid, 1263 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:31:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145354 states.