./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/locks/test_locks_10.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 c861265e1e1e27fe23877e47c41012b82996e1c7e91f362716a115cbf38b786b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:55:55,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:55:55,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:55:55,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:55:55,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:55:55,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:55:55,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:55:55,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:55:55,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:55:55,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:55:55,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:55:55,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:55:55,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:55:55,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:55:55,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:55:55,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:55:55,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:55:55,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:55:55,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:55:55,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:55:55,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:55:55,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:55:55,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:55:55,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:55:55,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:55:55,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:55:55,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:55:55,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:55:55,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:55:55,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:55:55,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:55:55,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:55:55,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:55:55,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:55:55,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:55:55,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:55:55,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:55:55,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:55:55,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:55:55,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:55:55,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:55:55,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:55:55,641 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:55:55,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:55:55,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:55:55,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:55:55,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:55:55,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:55:55,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:55:55,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:55:55,646 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:55:55,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:55:55,647 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:55:55,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:55:55,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:55:55,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:55:55,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:55:55,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:55:55,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:55:55,648 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:55:55,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:55:55,649 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:55:55,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:55:55,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:55:55,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:55:55,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:55:55,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:55:55,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:55:55,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:55:55,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:55:55,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:55:55,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:55:55,650 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:55:55,650 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:55:55,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:55:55,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c861265e1e1e27fe23877e47c41012b82996e1c7e91f362716a115cbf38b786b [2021-12-27 21:55:55,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:55:55,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:55:55,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:55:55,940 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:55:55,940 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:55:55,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_10.c [2021-12-27 21:55:55,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4960d61dd/fb3051c686f54408ab80082e393ff01a/FLAG63e4ff7dd [2021-12-27 21:55:56,304 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:55:56,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_10.c [2021-12-27 21:55:56,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4960d61dd/fb3051c686f54408ab80082e393ff01a/FLAG63e4ff7dd [2021-12-27 21:55:56,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4960d61dd/fb3051c686f54408ab80082e393ff01a [2021-12-27 21:55:56,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:55:56,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:55:56,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:55:56,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:55:56,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:55:56,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:56,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdb5c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56, skipping insertion in model container [2021-12-27 21:55:56,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:56,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:55:56,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:55:56,869 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/locks/test_locks_10.c[3901,3914] [2021-12-27 21:55:56,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:55:56,877 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:55:56,894 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/locks/test_locks_10.c[3901,3914] [2021-12-27 21:55:56,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:55:56,915 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:55:56,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56 WrapperNode [2021-12-27 21:55:56,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:55:56,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:55:56,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:55:56,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:55:56,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:56,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:56,968 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 138 [2021-12-27 21:55:56,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:55:56,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:55:56,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:55:56,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:55:56,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:56,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:56,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:56,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:56,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:57,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:57,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:57,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:55:57,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:55:57,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:55:57,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:55:57,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (1/1) ... [2021-12-27 21:55:57,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:55:57,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:55:57,038 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) [2021-12-27 21:55:57,045 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 [2021-12-27 21:55:57,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:55:57,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:55:57,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:55:57,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:55:57,120 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:55:57,121 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:55:57,292 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:55:57,296 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:55:57,297 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 21:55:57,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:55:57 BoogieIcfgContainer [2021-12-27 21:55:57,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:55:57,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:55:57,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:55:57,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:55:57,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:55:56" (1/3) ... [2021-12-27 21:55:57,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9a6acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:55:57, skipping insertion in model container [2021-12-27 21:55:57,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:55:56" (2/3) ... [2021-12-27 21:55:57,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9a6acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:55:57, skipping insertion in model container [2021-12-27 21:55:57,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:55:57" (3/3) ... [2021-12-27 21:55:57,303 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2021-12-27 21:55:57,307 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:55:57,307 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:55:57,339 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:55:57,343 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 [2021-12-27 21:55:57,344 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:55:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 38 states have (on average 1.894736842105263) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-27 21:55:57,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:57,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:57,358 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash 153349273, now seen corresponding path program 1 times [2021-12-27 21:55:57,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:57,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703247721] [2021-12-27 21:55:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:57,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:57,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:57,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703247721] [2021-12-27 21:55:57,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703247721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:57,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:57,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:57,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330597042] [2021-12-27 21:55:57,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:57,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:57,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:57,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:57,626 INFO L87 Difference]: Start difference. First operand has 40 states, 38 states have (on average 1.894736842105263) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:57,673 INFO L93 Difference]: Finished difference Result 83 states and 145 transitions. [2021-12-27 21:55:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:57,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-27 21:55:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:57,684 INFO L225 Difference]: With dead ends: 83 [2021-12-27 21:55:57,684 INFO L226 Difference]: Without dead ends: 69 [2021-12-27 21:55:57,690 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 [2021-12-27 21:55:57,694 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:57,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 139 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-27 21:55:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2021-12-27 21:55:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 46 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 86 transitions. [2021-12-27 21:55:57,729 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 86 transitions. Word has length 17 [2021-12-27 21:55:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:57,729 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 86 transitions. [2021-12-27 21:55:57,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 86 transitions. [2021-12-27 21:55:57,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-27 21:55:57,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:57,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:57,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:55:57,732 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash -433456741, now seen corresponding path program 1 times [2021-12-27 21:55:57,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:57,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472712734] [2021-12-27 21:55:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:57,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:57,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:57,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472712734] [2021-12-27 21:55:57,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472712734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:57,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:57,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:57,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858294577] [2021-12-27 21:55:57,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:57,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:57,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:57,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:57,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:57,803 INFO L87 Difference]: Start difference. First operand 47 states and 86 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:57,826 INFO L93 Difference]: Finished difference Result 114 states and 209 transitions. [2021-12-27 21:55:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:57,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-27 21:55:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:57,827 INFO L225 Difference]: With dead ends: 114 [2021-12-27 21:55:57,828 INFO L226 Difference]: Without dead ends: 69 [2021-12-27 21:55:57,828 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 [2021-12-27 21:55:57,829 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 48 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:57,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 143 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-27 21:55:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-12-27 21:55:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.8484848484848484) internal successors, (122), 66 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) [2021-12-27 21:55:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2021-12-27 21:55:57,839 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 17 [2021-12-27 21:55:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:57,841 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2021-12-27 21:55:57,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2021-12-27 21:55:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-27 21:55:57,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:57,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:57,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:55:57,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:57,843 INFO L85 PathProgramCache]: Analyzing trace with hash 459073515, now seen corresponding path program 1 times [2021-12-27 21:55:57,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:57,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387768419] [2021-12-27 21:55:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:57,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:57,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:57,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387768419] [2021-12-27 21:55:57,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387768419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:57,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:57,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:57,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927768463] [2021-12-27 21:55:57,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:57,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:57,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:57,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:57,882 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:57,905 INFO L93 Difference]: Finished difference Result 105 states and 186 transitions. [2021-12-27 21:55:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-12-27 21:55:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:57,907 INFO L225 Difference]: With dead ends: 105 [2021-12-27 21:55:57,907 INFO L226 Difference]: Without dead ends: 72 [2021-12-27 21:55:57,907 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 [2021-12-27 21:55:57,908 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 50 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:57,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-27 21:55:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-12-27 21:55:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 69 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 124 transitions. [2021-12-27 21:55:57,928 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 124 transitions. Word has length 18 [2021-12-27 21:55:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:57,928 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 124 transitions. [2021-12-27 21:55:57,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 124 transitions. [2021-12-27 21:55:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-27 21:55:57,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:57,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:57,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 21:55:57,930 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash -552043735, now seen corresponding path program 1 times [2021-12-27 21:55:57,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:57,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984856130] [2021-12-27 21:55:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:57,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:57,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:57,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984856130] [2021-12-27 21:55:57,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984856130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:57,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:57,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:57,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537251287] [2021-12-27 21:55:57,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:57,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:57,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:57,976 INFO L87 Difference]: Start difference. First operand 70 states and 124 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:57,995 INFO L93 Difference]: Finished difference Result 133 states and 237 transitions. [2021-12-27 21:55:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:57,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-12-27 21:55:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:57,996 INFO L225 Difference]: With dead ends: 133 [2021-12-27 21:55:57,996 INFO L226 Difference]: Without dead ends: 131 [2021-12-27 21:55:57,997 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 [2021-12-27 21:55:57,998 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 45 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:57,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 125 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-27 21:55:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-12-27 21:55:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.7934782608695652) internal successors, (165), 92 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 165 transitions. [2021-12-27 21:55:58,005 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 165 transitions. Word has length 18 [2021-12-27 21:55:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,005 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 165 transitions. [2021-12-27 21:55:58,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 165 transitions. [2021-12-27 21:55:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-27 21:55:58,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:58,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 21:55:58,006 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1138849749, now seen corresponding path program 1 times [2021-12-27 21:55:58,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074466787] [2021-12-27 21:55:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074466787] [2021-12-27 21:55:58,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074466787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561346474] [2021-12-27 21:55:58,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,060 INFO L87 Difference]: Start difference. First operand 93 states and 165 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,071 INFO L93 Difference]: Finished difference Result 221 states and 395 transitions. [2021-12-27 21:55:58,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-12-27 21:55:58,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,073 INFO L225 Difference]: With dead ends: 221 [2021-12-27 21:55:58,073 INFO L226 Difference]: Without dead ends: 133 [2021-12-27 21:55:58,073 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 [2021-12-27 21:55:58,074 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 47 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 144 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-27 21:55:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2021-12-27 21:55:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.7769230769230768) internal successors, (231), 130 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 231 transitions. [2021-12-27 21:55:58,092 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 231 transitions. Word has length 18 [2021-12-27 21:55:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,092 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 231 transitions. [2021-12-27 21:55:58,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 231 transitions. [2021-12-27 21:55:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 21:55:58,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:58,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 21:55:58,094 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,097 INFO L85 PathProgramCache]: Analyzing trace with hash 66727088, now seen corresponding path program 1 times [2021-12-27 21:55:58,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598953789] [2021-12-27 21:55:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598953789] [2021-12-27 21:55:58,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598953789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468741987] [2021-12-27 21:55:58,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,137 INFO L87 Difference]: Start difference. First operand 131 states and 231 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,147 INFO L93 Difference]: Finished difference Result 198 states and 346 transitions. [2021-12-27 21:55:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-27 21:55:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,150 INFO L225 Difference]: With dead ends: 198 [2021-12-27 21:55:58,150 INFO L226 Difference]: Without dead ends: 135 [2021-12-27 21:55:58,151 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 [2021-12-27 21:55:58,152 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 49 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 156 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-27 21:55:58,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-12-27 21:55:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.75) internal successors, (231), 132 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 231 transitions. [2021-12-27 21:55:58,166 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 231 transitions. Word has length 19 [2021-12-27 21:55:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,166 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 231 transitions. [2021-12-27 21:55:58,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 231 transitions. [2021-12-27 21:55:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 21:55:58,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:58,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-27 21:55:58,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash -944390162, now seen corresponding path program 1 times [2021-12-27 21:55:58,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290680204] [2021-12-27 21:55:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290680204] [2021-12-27 21:55:58,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290680204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482475568] [2021-12-27 21:55:58,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,214 INFO L87 Difference]: Start difference. First operand 133 states and 231 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,231 INFO L93 Difference]: Finished difference Result 381 states and 665 transitions. [2021-12-27 21:55:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-27 21:55:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,233 INFO L225 Difference]: With dead ends: 381 [2021-12-27 21:55:58,233 INFO L226 Difference]: Without dead ends: 255 [2021-12-27 21:55:58,233 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 [2021-12-27 21:55:58,234 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 47 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 127 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-27 21:55:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2021-12-27 21:55:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.7261904761904763) internal successors, (435), 252 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 435 transitions. [2021-12-27 21:55:58,247 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 435 transitions. Word has length 19 [2021-12-27 21:55:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,247 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 435 transitions. [2021-12-27 21:55:58,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 435 transitions. [2021-12-27 21:55:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 21:55:58,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:58,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 21:55:58,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash -357584148, now seen corresponding path program 1 times [2021-12-27 21:55:58,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333843272] [2021-12-27 21:55:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333843272] [2021-12-27 21:55:58,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333843272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588887386] [2021-12-27 21:55:58,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,275 INFO L87 Difference]: Start difference. First operand 253 states and 435 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,283 INFO L93 Difference]: Finished difference Result 321 states and 557 transitions. [2021-12-27 21:55:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-27 21:55:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,284 INFO L225 Difference]: With dead ends: 321 [2021-12-27 21:55:58,284 INFO L226 Difference]: Without dead ends: 319 [2021-12-27 21:55:58,285 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 [2021-12-27 21:55:58,292 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 42 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 170 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-27 21:55:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 253. [2021-12-27 21:55:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.7103174603174602) internal successors, (431), 252 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 431 transitions. [2021-12-27 21:55:58,312 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 431 transitions. Word has length 19 [2021-12-27 21:55:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,313 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 431 transitions. [2021-12-27 21:55:58,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 431 transitions. [2021-12-27 21:55:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 21:55:58,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:58,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 21:55:58,314 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash 788890080, now seen corresponding path program 1 times [2021-12-27 21:55:58,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268337936] [2021-12-27 21:55:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268337936] [2021-12-27 21:55:58,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268337936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939423440] [2021-12-27 21:55:58,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,349 INFO L87 Difference]: Start difference. First operand 253 states and 431 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,373 INFO L93 Difference]: Finished difference Result 469 states and 809 transitions. [2021-12-27 21:55:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-27 21:55:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,375 INFO L225 Difference]: With dead ends: 469 [2021-12-27 21:55:58,375 INFO L226 Difference]: Without dead ends: 467 [2021-12-27 21:55:58,375 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 [2021-12-27 21:55:58,376 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 39 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 121 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-27 21:55:58,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 353. [2021-12-27 21:55:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.6789772727272727) internal successors, (591), 352 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 591 transitions. [2021-12-27 21:55:58,387 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 591 transitions. Word has length 20 [2021-12-27 21:55:58,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,387 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 591 transitions. [2021-12-27 21:55:58,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,387 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 591 transitions. [2021-12-27 21:55:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 21:55:58,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,389 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] [2021-12-27 21:55:58,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 21:55:58,389 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,389 INFO L85 PathProgramCache]: Analyzing trace with hash 202084066, now seen corresponding path program 1 times [2021-12-27 21:55:58,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627654637] [2021-12-27 21:55:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627654637] [2021-12-27 21:55:58,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627654637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413237718] [2021-12-27 21:55:58,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,424 INFO L87 Difference]: Start difference. First operand 353 states and 591 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,442 INFO L93 Difference]: Finished difference Result 837 states and 1409 transitions. [2021-12-27 21:55:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-27 21:55:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,445 INFO L225 Difference]: With dead ends: 837 [2021-12-27 21:55:58,445 INFO L226 Difference]: Without dead ends: 491 [2021-12-27 21:55:58,448 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 [2021-12-27 21:55:58,449 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 45 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 146 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-27 21:55:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 489. [2021-12-27 21:55:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.6618852459016393) internal successors, (811), 488 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 811 transitions. [2021-12-27 21:55:58,467 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 811 transitions. Word has length 20 [2021-12-27 21:55:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,467 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 811 transitions. [2021-12-27 21:55:58,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 811 transitions. [2021-12-27 21:55:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:55:58,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,469 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] [2021-12-27 21:55:58,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-27 21:55:58,469 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1313996925, now seen corresponding path program 1 times [2021-12-27 21:55:58,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665354648] [2021-12-27 21:55:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665354648] [2021-12-27 21:55:58,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665354648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86577068] [2021-12-27 21:55:58,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,518 INFO L87 Difference]: Start difference. First operand 489 states and 811 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,536 INFO L93 Difference]: Finished difference Result 741 states and 1225 transitions. [2021-12-27 21:55:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-27 21:55:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,538 INFO L225 Difference]: With dead ends: 741 [2021-12-27 21:55:58,539 INFO L226 Difference]: Without dead ends: 503 [2021-12-27 21:55:58,539 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 [2021-12-27 21:55:58,540 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 47 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 148 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-12-27 21:55:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 501. [2021-12-27 21:55:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.638) internal successors, (819), 500 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 819 transitions. [2021-12-27 21:55:58,553 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 819 transitions. Word has length 21 [2021-12-27 21:55:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,555 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 819 transitions. [2021-12-27 21:55:58,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 819 transitions. [2021-12-27 21:55:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:55:58,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,562 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] [2021-12-27 21:55:58,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-27 21:55:58,562 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1969853121, now seen corresponding path program 1 times [2021-12-27 21:55:58,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143500237] [2021-12-27 21:55:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143500237] [2021-12-27 21:55:58,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143500237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061994284] [2021-12-27 21:55:58,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,592 INFO L87 Difference]: Start difference. First operand 501 states and 819 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,607 INFO L93 Difference]: Finished difference Result 905 states and 1501 transitions. [2021-12-27 21:55:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-27 21:55:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,610 INFO L225 Difference]: With dead ends: 905 [2021-12-27 21:55:58,610 INFO L226 Difference]: Without dead ends: 903 [2021-12-27 21:55:58,610 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 [2021-12-27 21:55:58,611 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 36 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 119 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-12-27 21:55:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 709. [2021-12-27 21:55:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.597457627118644) internal successors, (1131), 708 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1131 transitions. [2021-12-27 21:55:58,626 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1131 transitions. Word has length 21 [2021-12-27 21:55:58,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,627 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1131 transitions. [2021-12-27 21:55:58,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,627 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1131 transitions. [2021-12-27 21:55:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:55:58,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,629 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] [2021-12-27 21:55:58,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-27 21:55:58,629 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1383047107, now seen corresponding path program 1 times [2021-12-27 21:55:58,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310216382] [2021-12-27 21:55:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310216382] [2021-12-27 21:55:58,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310216382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693493124] [2021-12-27 21:55:58,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,668 INFO L87 Difference]: Start difference. First operand 709 states and 1131 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,688 INFO L93 Difference]: Finished difference Result 1657 states and 2653 transitions. [2021-12-27 21:55:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-27 21:55:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,692 INFO L225 Difference]: With dead ends: 1657 [2021-12-27 21:55:58,692 INFO L226 Difference]: Without dead ends: 967 [2021-12-27 21:55:58,694 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 [2021-12-27 21:55:58,695 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 44 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 147 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-12-27 21:55:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 965. [2021-12-27 21:55:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 1.579875518672199) internal successors, (1523), 964 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1523 transitions. [2021-12-27 21:55:58,715 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1523 transitions. Word has length 21 [2021-12-27 21:55:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,716 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1523 transitions. [2021-12-27 21:55:58,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1523 transitions. [2021-12-27 21:55:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:55:58,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,718 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] [2021-12-27 21:55:58,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-27 21:55:58,718 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,719 INFO L85 PathProgramCache]: Analyzing trace with hash 936119319, now seen corresponding path program 1 times [2021-12-27 21:55:58,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708613304] [2021-12-27 21:55:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708613304] [2021-12-27 21:55:58,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708613304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611409842] [2021-12-27 21:55:58,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,760 INFO L87 Difference]: Start difference. First operand 965 states and 1523 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,788 INFO L93 Difference]: Finished difference Result 1449 states and 2277 transitions. [2021-12-27 21:55:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-27 21:55:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,791 INFO L225 Difference]: With dead ends: 1449 [2021-12-27 21:55:58,792 INFO L226 Difference]: Without dead ends: 983 [2021-12-27 21:55:58,792 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 [2021-12-27 21:55:58,793 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 144 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-12-27 21:55:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 981. [2021-12-27 21:55:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.5540816326530613) internal successors, (1523), 980 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1523 transitions. [2021-12-27 21:55:58,814 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1523 transitions. Word has length 22 [2021-12-27 21:55:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,814 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1523 transitions. [2021-12-27 21:55:58,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1523 transitions. [2021-12-27 21:55:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:55:58,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,816 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] [2021-12-27 21:55:58,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-27 21:55:58,816 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash -74997931, now seen corresponding path program 1 times [2021-12-27 21:55:58,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826094821] [2021-12-27 21:55:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826094821] [2021-12-27 21:55:58,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826094821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654325610] [2021-12-27 21:55:58,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,844 INFO L87 Difference]: Start difference. First operand 981 states and 1523 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,867 INFO L93 Difference]: Finished difference Result 1737 states and 2741 transitions. [2021-12-27 21:55:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-27 21:55:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,874 INFO L225 Difference]: With dead ends: 1737 [2021-12-27 21:55:58,874 INFO L226 Difference]: Without dead ends: 1735 [2021-12-27 21:55:58,876 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 [2021-12-27 21:55:58,876 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 117 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-12-27 21:55:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1413. [2021-12-27 21:55:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 1.5092067988668556) internal successors, (2131), 1412 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 2131 transitions. [2021-12-27 21:55:58,930 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 2131 transitions. Word has length 22 [2021-12-27 21:55:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:58,931 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 2131 transitions. [2021-12-27 21:55:58,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 2131 transitions. [2021-12-27 21:55:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:55:58,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:58,933 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] [2021-12-27 21:55:58,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-27 21:55:58,934 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash -661803945, now seen corresponding path program 1 times [2021-12-27 21:55:58,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:58,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715365486] [2021-12-27 21:55:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:58,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:58,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:58,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715365486] [2021-12-27 21:55:58,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715365486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:58,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:58,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:58,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724883405] [2021-12-27 21:55:58,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:58,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:58,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:58,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:58,958 INFO L87 Difference]: Start difference. First operand 1413 states and 2131 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:58,984 INFO L93 Difference]: Finished difference Result 3273 states and 4949 transitions. [2021-12-27 21:55:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:58,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-27 21:55:58,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:58,989 INFO L225 Difference]: With dead ends: 3273 [2021-12-27 21:55:58,989 INFO L226 Difference]: Without dead ends: 1895 [2021-12-27 21:55:58,991 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 [2021-12-27 21:55:58,992 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 43 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:58,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 148 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-12-27 21:55:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1893. [2021-12-27 21:55:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 1.4899577167019027) internal successors, (2819), 1892 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2819 transitions. [2021-12-27 21:55:59,032 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2819 transitions. Word has length 22 [2021-12-27 21:55:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:59,032 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2819 transitions. [2021-12-27 21:55:59,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2819 transitions. [2021-12-27 21:55:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 21:55:59,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:59,034 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] [2021-12-27 21:55:59,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-27 21:55:59,034 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1970246488, now seen corresponding path program 1 times [2021-12-27 21:55:59,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:59,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612551837] [2021-12-27 21:55:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:59,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:59,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:59,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612551837] [2021-12-27 21:55:59,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612551837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:59,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:59,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:59,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473510598] [2021-12-27 21:55:59,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:59,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:59,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:59,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:59,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:59,059 INFO L87 Difference]: Start difference. First operand 1893 states and 2819 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:59,114 INFO L93 Difference]: Finished difference Result 2841 states and 4213 transitions. [2021-12-27 21:55:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-27 21:55:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:59,119 INFO L225 Difference]: With dead ends: 2841 [2021-12-27 21:55:59,119 INFO L226 Difference]: Without dead ends: 1927 [2021-12-27 21:55:59,121 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 [2021-12-27 21:55:59,122 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 45 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:59,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 140 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-12-27 21:55:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1925. [2021-12-27 21:55:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 1.4651767151767152) internal successors, (2819), 1924 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2819 transitions. [2021-12-27 21:55:59,166 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2819 transitions. Word has length 23 [2021-12-27 21:55:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:59,166 INFO L470 AbstractCegarLoop]: Abstraction has 1925 states and 2819 transitions. [2021-12-27 21:55:59,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2819 transitions. [2021-12-27 21:55:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 21:55:59,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:59,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:55:59,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-27 21:55:59,169 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:59,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:59,169 INFO L85 PathProgramCache]: Analyzing trace with hash 959129238, now seen corresponding path program 1 times [2021-12-27 21:55:59,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:59,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529349786] [2021-12-27 21:55:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:59,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:59,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:59,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529349786] [2021-12-27 21:55:59,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529349786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:59,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:59,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:59,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819546796] [2021-12-27 21:55:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:59,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:59,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:59,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:59,192 INFO L87 Difference]: Start difference. First operand 1925 states and 2819 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:59,228 INFO L93 Difference]: Finished difference Result 3337 states and 4965 transitions. [2021-12-27 21:55:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:59,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-27 21:55:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:59,237 INFO L225 Difference]: With dead ends: 3337 [2021-12-27 21:55:59,237 INFO L226 Difference]: Without dead ends: 3335 [2021-12-27 21:55:59,239 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 [2021-12-27 21:55:59,240 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 30 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:59,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 115 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-12-27 21:55:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 2821. [2021-12-27 21:55:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 1.4195035460992909) internal successors, (4003), 2820 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 4003 transitions. [2021-12-27 21:55:59,316 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 4003 transitions. Word has length 23 [2021-12-27 21:55:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:59,317 INFO L470 AbstractCegarLoop]: Abstraction has 2821 states and 4003 transitions. [2021-12-27 21:55:59,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 4003 transitions. [2021-12-27 21:55:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 21:55:59,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:59,319 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] [2021-12-27 21:55:59,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-27 21:55:59,320 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:59,323 INFO L85 PathProgramCache]: Analyzing trace with hash 372323224, now seen corresponding path program 1 times [2021-12-27 21:55:59,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:59,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869356] [2021-12-27 21:55:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:59,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:59,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:59,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869356] [2021-12-27 21:55:59,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:59,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:59,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:59,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825238162] [2021-12-27 21:55:59,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:59,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:59,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:59,353 INFO L87 Difference]: Start difference. First operand 2821 states and 4003 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:59,401 INFO L93 Difference]: Finished difference Result 6473 states and 9189 transitions. [2021-12-27 21:55:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:59,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-27 21:55:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:59,411 INFO L225 Difference]: With dead ends: 6473 [2021-12-27 21:55:59,411 INFO L226 Difference]: Without dead ends: 3719 [2021-12-27 21:55:59,415 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 [2021-12-27 21:55:59,415 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 42 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:59,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 149 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-12-27 21:55:59,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3717. [2021-12-27 21:55:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3717 states, 3716 states have (on average 1.3958557588805167) internal successors, (5187), 3716 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5187 transitions. [2021-12-27 21:55:59,495 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5187 transitions. Word has length 23 [2021-12-27 21:55:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:59,495 INFO L470 AbstractCegarLoop]: Abstraction has 3717 states and 5187 transitions. [2021-12-27 21:55:59,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5187 transitions. [2021-12-27 21:55:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:55:59,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:59,514 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] [2021-12-27 21:55:59,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-27 21:55:59,514 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash -331549300, now seen corresponding path program 1 times [2021-12-27 21:55:59,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689405522] [2021-12-27 21:55:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:59,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:59,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:59,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689405522] [2021-12-27 21:55:59,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689405522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:59,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:59,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:59,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807962717] [2021-12-27 21:55:59,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:59,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:59,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:59,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:59,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:59,532 INFO L87 Difference]: Start difference. First operand 3717 states and 5187 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:59,576 INFO L93 Difference]: Finished difference Result 5577 states and 7749 transitions. [2021-12-27 21:55:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:59,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-27 21:55:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:59,587 INFO L225 Difference]: With dead ends: 5577 [2021-12-27 21:55:59,587 INFO L226 Difference]: Without dead ends: 3783 [2021-12-27 21:55:59,589 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 [2021-12-27 21:55:59,590 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 44 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:59,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 136 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2021-12-27 21:55:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3781. [2021-12-27 21:55:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3780 states have (on average 1.3722222222222222) internal successors, (5187), 3780 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 5187 transitions. [2021-12-27 21:55:59,677 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 5187 transitions. Word has length 24 [2021-12-27 21:55:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:59,677 INFO L470 AbstractCegarLoop]: Abstraction has 3781 states and 5187 transitions. [2021-12-27 21:55:59,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 5187 transitions. [2021-12-27 21:55:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:55:59,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:59,680 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] [2021-12-27 21:55:59,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-27 21:55:59,680 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1342666550, now seen corresponding path program 1 times [2021-12-27 21:55:59,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:59,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610996668] [2021-12-27 21:55:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:59,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:59,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:59,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610996668] [2021-12-27 21:55:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610996668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:59,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:59,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:59,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780774775] [2021-12-27 21:55:59,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:59,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:59,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:59,706 INFO L87 Difference]: Start difference. First operand 3781 states and 5187 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:55:59,786 INFO L93 Difference]: Finished difference Result 6409 states and 8901 transitions. [2021-12-27 21:55:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:55:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-27 21:55:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:55:59,811 INFO L225 Difference]: With dead ends: 6409 [2021-12-27 21:55:59,811 INFO L226 Difference]: Without dead ends: 6407 [2021-12-27 21:55:59,813 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 [2021-12-27 21:55:59,814 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 27 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:55:59,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 113 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:55:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2021-12-27 21:55:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 5637. [2021-12-27 21:55:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5637 states, 5636 states have (on average 1.3291341376863024) internal successors, (7491), 5636 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5637 states to 5637 states and 7491 transitions. [2021-12-27 21:55:59,949 INFO L78 Accepts]: Start accepts. Automaton has 5637 states and 7491 transitions. Word has length 24 [2021-12-27 21:55:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:55:59,950 INFO L470 AbstractCegarLoop]: Abstraction has 5637 states and 7491 transitions. [2021-12-27 21:55:59,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:55:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5637 states and 7491 transitions. [2021-12-27 21:55:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:55:59,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:55:59,955 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] [2021-12-27 21:55:59,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-27 21:55:59,956 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:55:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:55:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1929472564, now seen corresponding path program 1 times [2021-12-27 21:55:59,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:55:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108972709] [2021-12-27 21:55:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:55:59,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:55:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:55:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:55:59,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:55:59,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108972709] [2021-12-27 21:55:59,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108972709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:55:59,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:55:59,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:55:59,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613762218] [2021-12-27 21:55:59,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:55:59,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:55:59,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:55:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:55:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:55:59,977 INFO L87 Difference]: Start difference. First operand 5637 states and 7491 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:00,081 INFO L93 Difference]: Finished difference Result 12809 states and 16965 transitions. [2021-12-27 21:56:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:00,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-27 21:56:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:00,092 INFO L225 Difference]: With dead ends: 12809 [2021-12-27 21:56:00,093 INFO L226 Difference]: Without dead ends: 7303 [2021-12-27 21:56:00,101 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 [2021-12-27 21:56:00,102 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 41 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:00,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 150 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7303 states. [2021-12-27 21:56:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7303 to 7301. [2021-12-27 21:56:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7301 states, 7300 states have (on average 1.297945205479452) internal successors, (9475), 7300 states have internal predecessors, (9475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7301 states to 7301 states and 9475 transitions. [2021-12-27 21:56:00,308 INFO L78 Accepts]: Start accepts. Automaton has 7301 states and 9475 transitions. Word has length 24 [2021-12-27 21:56:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:00,309 INFO L470 AbstractCegarLoop]: Abstraction has 7301 states and 9475 transitions. [2021-12-27 21:56:00,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7301 states and 9475 transitions. [2021-12-27 21:56:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-27 21:56:00,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:00,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:00,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-27 21:56:00,315 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:00,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1327225645, now seen corresponding path program 1 times [2021-12-27 21:56:00,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:00,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775615] [2021-12-27 21:56:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:00,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:00,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:00,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775615] [2021-12-27 21:56:00,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:00,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:00,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:00,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164227675] [2021-12-27 21:56:00,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:00,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:00,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:00,335 INFO L87 Difference]: Start difference. First operand 7301 states and 9475 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:00,412 INFO L93 Difference]: Finished difference Result 10953 states and 14149 transitions. [2021-12-27 21:56:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-27 21:56:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:00,424 INFO L225 Difference]: With dead ends: 10953 [2021-12-27 21:56:00,424 INFO L226 Difference]: Without dead ends: 7431 [2021-12-27 21:56:00,429 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 [2021-12-27 21:56:00,430 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 43 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:00,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 132 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2021-12-27 21:56:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7429. [2021-12-27 21:56:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7429 states, 7428 states have (on average 1.2755788906838987) internal successors, (9475), 7428 states have internal predecessors, (9475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 9475 transitions. [2021-12-27 21:56:00,611 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 9475 transitions. Word has length 25 [2021-12-27 21:56:00,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:00,611 INFO L470 AbstractCegarLoop]: Abstraction has 7429 states and 9475 transitions. [2021-12-27 21:56:00,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 9475 transitions. [2021-12-27 21:56:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-27 21:56:00,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:00,616 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] [2021-12-27 21:56:00,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-27 21:56:00,617 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 316108395, now seen corresponding path program 1 times [2021-12-27 21:56:00,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:00,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769537232] [2021-12-27 21:56:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:00,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:00,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:00,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769537232] [2021-12-27 21:56:00,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769537232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:00,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:00,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:00,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754385320] [2021-12-27 21:56:00,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:00,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:00,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:00,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:00,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:00,637 INFO L87 Difference]: Start difference. First operand 7429 states and 9475 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:00,769 INFO L93 Difference]: Finished difference Result 12297 states and 15749 transitions. [2021-12-27 21:56:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:00,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-27 21:56:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:00,787 INFO L225 Difference]: With dead ends: 12297 [2021-12-27 21:56:00,787 INFO L226 Difference]: Without dead ends: 12295 [2021-12-27 21:56:00,790 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 [2021-12-27 21:56:00,791 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:00,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 111 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:00,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2021-12-27 21:56:00,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 11269. [2021-12-27 21:56:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 1.238462903798367) internal successors, (13955), 11268 states have internal predecessors, (13955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13955 transitions. [2021-12-27 21:56:01,001 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13955 transitions. Word has length 25 [2021-12-27 21:56:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:01,001 INFO L470 AbstractCegarLoop]: Abstraction has 11269 states and 13955 transitions. [2021-12-27 21:56:01,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:01,001 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13955 transitions. [2021-12-27 21:56:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-27 21:56:01,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:01,012 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] [2021-12-27 21:56:01,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-27 21:56:01,013 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:01,013 INFO L85 PathProgramCache]: Analyzing trace with hash -270697619, now seen corresponding path program 1 times [2021-12-27 21:56:01,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:01,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577320795] [2021-12-27 21:56:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:01,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:01,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:01,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577320795] [2021-12-27 21:56:01,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577320795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:01,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:01,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:01,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473229541] [2021-12-27 21:56:01,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:01,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:01,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:01,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:01,035 INFO L87 Difference]: Start difference. First operand 11269 states and 13955 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:01,183 INFO L93 Difference]: Finished difference Result 25353 states and 31109 transitions. [2021-12-27 21:56:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:01,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-27 21:56:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:01,205 INFO L225 Difference]: With dead ends: 25353 [2021-12-27 21:56:01,205 INFO L226 Difference]: Without dead ends: 14343 [2021-12-27 21:56:01,220 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 [2021-12-27 21:56:01,220 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 40 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:01,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 151 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2021-12-27 21:56:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 14341. [2021-12-27 21:56:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14341 states, 14340 states have (on average 1.1963040446304045) internal successors, (17155), 14340 states have internal predecessors, (17155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14341 states to 14341 states and 17155 transitions. [2021-12-27 21:56:01,507 INFO L78 Accepts]: Start accepts. Automaton has 14341 states and 17155 transitions. Word has length 25 [2021-12-27 21:56:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:01,508 INFO L470 AbstractCegarLoop]: Abstraction has 14341 states and 17155 transitions. [2021-12-27 21:56:01,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 14341 states and 17155 transitions. [2021-12-27 21:56:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 21:56:01,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:01,519 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] [2021-12-27 21:56:01,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-27 21:56:01,519 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1209641729, now seen corresponding path program 1 times [2021-12-27 21:56:01,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534004887] [2021-12-27 21:56:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:01,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:01,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:01,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534004887] [2021-12-27 21:56:01,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534004887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:01,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:01,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:01,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108111850] [2021-12-27 21:56:01,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:01,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:01,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:01,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:01,534 INFO L87 Difference]: Start difference. First operand 14341 states and 17155 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:01,699 INFO L93 Difference]: Finished difference Result 21513 states and 25605 transitions. [2021-12-27 21:56:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:01,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-27 21:56:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:01,722 INFO L225 Difference]: With dead ends: 21513 [2021-12-27 21:56:01,722 INFO L226 Difference]: Without dead ends: 14599 [2021-12-27 21:56:01,732 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 [2021-12-27 21:56:01,733 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:01,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 128 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14599 states. [2021-12-27 21:56:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14599 to 14597. [2021-12-27 21:56:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14597 states, 14596 states have (on average 1.175322006029049) internal successors, (17155), 14596 states have internal predecessors, (17155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14597 states to 14597 states and 17155 transitions. [2021-12-27 21:56:02,025 INFO L78 Accepts]: Start accepts. Automaton has 14597 states and 17155 transitions. Word has length 26 [2021-12-27 21:56:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:02,025 INFO L470 AbstractCegarLoop]: Abstraction has 14597 states and 17155 transitions. [2021-12-27 21:56:02,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 14597 states and 17155 transitions. [2021-12-27 21:56:02,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 21:56:02,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:02,036 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] [2021-12-27 21:56:02,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-27 21:56:02,036 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:02,036 INFO L85 PathProgramCache]: Analyzing trace with hash 198524479, now seen corresponding path program 1 times [2021-12-27 21:56:02,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:02,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670992910] [2021-12-27 21:56:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:02,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:02,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:02,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670992910] [2021-12-27 21:56:02,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670992910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:02,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:02,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:02,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693925740] [2021-12-27 21:56:02,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:02,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:02,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:02,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:02,050 INFO L87 Difference]: Start difference. First operand 14597 states and 17155 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:02,225 INFO L93 Difference]: Finished difference Result 23559 states and 27396 transitions. [2021-12-27 21:56:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:02,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-27 21:56:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:02,252 INFO L225 Difference]: With dead ends: 23559 [2021-12-27 21:56:02,252 INFO L226 Difference]: Without dead ends: 23557 [2021-12-27 21:56:02,257 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 [2021-12-27 21:56:02,257 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 20 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:02,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 108 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23557 states. [2021-12-27 21:56:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23557 to 22533. [2021-12-27 21:56:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22533 states, 22532 states have (on average 1.1476566660749157) internal successors, (25859), 22532 states have internal predecessors, (25859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22533 states to 22533 states and 25859 transitions. [2021-12-27 21:56:02,589 INFO L78 Accepts]: Start accepts. Automaton has 22533 states and 25859 transitions. Word has length 26 [2021-12-27 21:56:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:02,589 INFO L470 AbstractCegarLoop]: Abstraction has 22533 states and 25859 transitions. [2021-12-27 21:56:02,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 22533 states and 25859 transitions. [2021-12-27 21:56:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 21:56:02,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:02,613 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] [2021-12-27 21:56:02,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-27 21:56:02,614 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:02,614 INFO L85 PathProgramCache]: Analyzing trace with hash -388281535, now seen corresponding path program 1 times [2021-12-27 21:56:02,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:02,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986744659] [2021-12-27 21:56:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:02,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:02,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:02,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986744659] [2021-12-27 21:56:02,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986744659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:02,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:02,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:02,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402422136] [2021-12-27 21:56:02,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:02,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:02,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:02,630 INFO L87 Difference]: Start difference. First operand 22533 states and 25859 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:02,961 INFO L93 Difference]: Finished difference Result 50181 states and 56579 transitions. [2021-12-27 21:56:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:02,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-27 21:56:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:02,962 INFO L225 Difference]: With dead ends: 50181 [2021-12-27 21:56:02,962 INFO L226 Difference]: Without dead ends: 0 [2021-12-27 21:56:02,986 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 [2021-12-27 21:56:02,986 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 38 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:02,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 150 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-27 21:56:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-27 21:56:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-27 21:56:02,987 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-12-27 21:56:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:02,987 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-27 21:56:02,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:02,987 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-27 21:56:02,987 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-27 21:56:02,989 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-27 21:56:02,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-27 21:56:02,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-27 21:56:03,001 INFO L858 garLoopResultBuilder]: For program point L126(line 126) no Hoare annotation was computed. [2021-12-27 21:56:03,002 INFO L858 garLoopResultBuilder]: For program point L151(line 151) no Hoare annotation was computed. [2021-12-27 21:56:03,002 INFO L858 garLoopResultBuilder]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,002 INFO L858 garLoopResultBuilder]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,002 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-27 21:56:03,002 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-27 21:56:03,002 INFO L858 garLoopResultBuilder]: For program point L111(line 111) no Hoare annotation was computed. [2021-12-27 21:56:03,002 INFO L858 garLoopResultBuilder]: For program point L136(line 136) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L861 garLoopResultBuilder]: At program point L161(lines 7 165) the Hoare annotation is: true [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L96-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L121(line 121) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L88-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L146(line 146) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L80-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L72-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L861 garLoopResultBuilder]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2021-12-27 21:56:03,003 INFO L861 garLoopResultBuilder]: At program point L164(lines 6 165) the Hoare annotation is: true [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L131(line 131) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L858 garLoopResultBuilder]: For program point L156(line 156) no Hoare annotation was computed. [2021-12-27 21:56:03,003 INFO L854 garLoopResultBuilder]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L116(line 116) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L141(line 141) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L100-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L92-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L84-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 45) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L76-1(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L68(lines 68 70) no Hoare annotation was computed. [2021-12-27 21:56:03,004 INFO L858 garLoopResultBuilder]: For program point L68-2(lines 41 160) no Hoare annotation was computed. [2021-12-27 21:56:03,011 INFO L732 BasicCegarLoop]: Path program 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] [2021-12-27 21:56:03,012 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-27 21:56:03,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 09:56:03 BoogieIcfgContainer [2021-12-27 21:56:03,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-27 21:56:03,025 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-27 21:56:03,025 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-27 21:56:03,025 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-27 21:56:03,026 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:55:57" (3/4) ... [2021-12-27 21:56:03,028 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-27 21:56:03,038 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-12-27 21:56:03,038 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-27 21:56:03,038 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-27 21:56:03,038 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-27 21:56:03,072 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-27 21:56:03,072 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-27 21:56:03,073 INFO L158 Benchmark]: Toolchain (without parser) took 6337.31ms. Allocated memory was 75.5MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 56.9MB in the beginning and 854.9MB in the end (delta: -798.0MB). Peak memory consumption was 275.2MB. Max. memory is 16.1GB. [2021-12-27 21:56:03,073 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 75.5MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 21:56:03,073 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.84ms. Allocated memory is still 75.5MB. Free memory was 56.7MB in the beginning and 58.0MB in the end (delta: -1.2MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2021-12-27 21:56:03,073 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.51ms. Allocated memory is still 75.5MB. Free memory was 58.0MB in the beginning and 56.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 21:56:03,074 INFO L158 Benchmark]: Boogie Preprocessor took 42.49ms. Allocated memory is still 75.5MB. Free memory was 56.2MB in the beginning and 54.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 21:56:03,087 INFO L158 Benchmark]: RCFGBuilder took 285.04ms. Allocated memory is still 75.5MB. Free memory was 54.9MB in the beginning and 42.4MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-27 21:56:03,087 INFO L158 Benchmark]: TraceAbstraction took 5725.69ms. Allocated memory was 75.5MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 42.1MB in the beginning and 859.1MB in the end (delta: -817.0MB). Peak memory consumption was 259.6MB. Max. memory is 16.1GB. [2021-12-27 21:56:03,087 INFO L158 Benchmark]: Witness Printer took 46.94ms. Allocated memory is still 1.1GB. Free memory was 859.1MB in the beginning and 854.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-27 21:56:03,088 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 75.5MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.84ms. Allocated memory is still 75.5MB. Free memory was 56.7MB in the beginning and 58.0MB in the end (delta: -1.2MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.51ms. Allocated memory is still 75.5MB. Free memory was 58.0MB in the beginning and 56.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.49ms. Allocated memory is still 75.5MB. Free memory was 56.2MB in the beginning and 54.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 285.04ms. Allocated memory is still 75.5MB. Free memory was 54.9MB in the beginning and 42.4MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5725.69ms. Allocated memory was 75.5MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 42.1MB in the beginning and 859.1MB in the end (delta: -817.0MB). Peak memory consumption was 259.6MB. Max. memory is 16.1GB. * Witness Printer took 46.94ms. Allocated memory is still 1.1GB. Free memory was 859.1MB in the beginning and 854.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 163]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.7s, OverallIterations: 28, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1149 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1149 mSDsluCounter, 3837 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1533 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 149 IncrementalHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 2304 mSDtfsCounter, 149 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22533occurred in iteration=27, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.2s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 1033 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 608 NumberOfCodeBlocks, 608 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 580 ConstructedInterpolants, 0 QuantifiedInterpolants, 1240 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-27 21:56:03,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE