./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i -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 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:43:16,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:43:16,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:43:16,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:43:16,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:43:16,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:43:16,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:43:16,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:43:16,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:43:16,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:43:16,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:43:16,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:43:16,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:43:16,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:43:16,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:43:16,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:43:16,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:43:16,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:43:16,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:43:16,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:43:16,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:43:16,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:43:16,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:43:16,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:43:16,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:43:16,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:43:16,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:43:16,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:43:16,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:43:16,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:43:16,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:43:16,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:43:16,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:43:16,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:43:16,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:43:16,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:43:16,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:43:16,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:43:16,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:43:16,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:43:16,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:43:16,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:43:16,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:43:16,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:43:16,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:43:16,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:43:16,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:43:16,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:43:16,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:43:16,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:43:16,139 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:43:16,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:43:16,140 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:43:16,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:43:16,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:43:16,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:43:16,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:43:16,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:43:16,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:43:16,141 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:43:16,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:43:16,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:43:16,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:43:16,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:43:16,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:43:16,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:43:16,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:43:16,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:43:16,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:43:16,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:43:16,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:43:16,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:43:16,144 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:43:16,144 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:43:16,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:43:16,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:43:16,145 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2021-12-21 09:43:16,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:43:16,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:43:16,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:43:16,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:43:16,381 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:43:16,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2021-12-21 09:43:16,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a12c688/52a728262b064fc78bc6b1c8b849b7a4/FLAG520c49e01 [2021-12-21 09:43:16,812 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:43:16,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2021-12-21 09:43:16,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a12c688/52a728262b064fc78bc6b1c8b849b7a4/FLAG520c49e01 [2021-12-21 09:43:16,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a12c688/52a728262b064fc78bc6b1c8b849b7a4 [2021-12-21 09:43:16,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:43:16,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:43:16,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:43:16,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:43:16,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:43:16,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:43:16" (1/1) ... [2021-12-21 09:43:16,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a61550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:16, skipping insertion in model container [2021-12-21 09:43:16,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:43:16" (1/1) ... [2021-12-21 09:43:16,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:43:16,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:43:16,962 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/array-examples/sorting_bubblesort_ground-1.i[820,833] [2021-12-21 09:43:16,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:43:16,984 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:43:16,993 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/array-examples/sorting_bubblesort_ground-1.i[820,833] [2021-12-21 09:43:16,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:43:17,006 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:43:17,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17 WrapperNode [2021-12-21 09:43:17,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:43:17,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:43:17,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:43:17,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:43:17,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,028 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2021-12-21 09:43:17,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:43:17,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:43:17,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:43:17,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:43:17,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:43:17,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:43:17,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:43:17,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:43:17,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (1/1) ... [2021-12-21 09:43:17,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:43:17,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:17,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 09:43:17,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 09:43:17,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:43:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:43:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 09:43:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:43:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:43:17,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:43:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:43:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 09:43:17,150 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:43:17,151 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:43:17,236 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:43:17,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:43:17,240 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-21 09:43:17,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:43:17 BoogieIcfgContainer [2021-12-21 09:43:17,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:43:17,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:43:17,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:43:17,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:43:17,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:43:16" (1/3) ... [2021-12-21 09:43:17,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc53fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:43:17, skipping insertion in model container [2021-12-21 09:43:17,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:17" (2/3) ... [2021-12-21 09:43:17,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc53fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:43:17, skipping insertion in model container [2021-12-21 09:43:17,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:43:17" (3/3) ... [2021-12-21 09:43:17,254 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2021-12-21 09:43:17,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:43:17,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:43:17,299 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:43:17,304 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 09:43:17,311 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:43:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 09:43:17,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:17,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:17,360 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:17,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2021-12-21 09:43:17,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:17,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652694230] [2021-12-21 09:43:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:17,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:43:17,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652694230] [2021-12-21 09:43:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652694230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:43:17,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:43:17,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:43:17,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471158223] [2021-12-21 09:43:17,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:43:17,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:43:17,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:17,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:43:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:43:17,510 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:17,543 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-12-21 09:43:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:43:17,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-21 09:43:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:17,550 INFO L225 Difference]: With dead ends: 42 [2021-12-21 09:43:17,550 INFO L226 Difference]: Without dead ends: 20 [2021-12-21 09:43:17,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:43:17,558 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 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 [2021-12-21 09:43:17,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:43:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-21 09:43:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-12-21 09:43:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-12-21 09:43:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-12-21 09:43:17,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-12-21 09:43:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:17,589 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-12-21 09:43:17,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-12-21 09:43:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 09:43:17,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:17,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:17,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:43:17,593 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2021-12-21 09:43:17,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:17,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490655130] [2021-12-21 09:43:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:17,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:43:17,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:17,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490655130] [2021-12-21 09:43:17,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490655130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:17,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668470345] [2021-12-21 09:43:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:17,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:17,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:17,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:43:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:17,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 09:43:17,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:43:17,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 09:43:17,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668470345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:43:17,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 09:43:17,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 09:43:17,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530143311] [2021-12-21 09:43:17,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:43:17,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:43:17,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:17,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:43:17,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:43:17,749 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:17,761 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-12-21 09:43:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:43:17,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-21 09:43:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:17,764 INFO L225 Difference]: With dead ends: 32 [2021-12-21 09:43:17,766 INFO L226 Difference]: Without dead ends: 23 [2021-12-21 09:43:17,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:43:17,767 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:17,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:43:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-21 09:43:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-21 09:43:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-12-21 09:43:17,779 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2021-12-21 09:43:17,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:17,783 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-12-21 09:43:17,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-12-21 09:43:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 09:43:17,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:17,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:17,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:17,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:17,992 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2021-12-21 09:43:17,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:17,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976997574] [2021-12-21 09:43:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:17,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:43:18,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:18,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976997574] [2021-12-21 09:43:18,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976997574] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:18,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273637892] [2021-12-21 09:43:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:18,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:18,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:18,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:18,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:43:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:18,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 09:43:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:43:18,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 09:43:18,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273637892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:43:18,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 09:43:18,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 09:43:18,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383126666] [2021-12-21 09:43:18,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:43:18,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:43:18,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:43:18,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:43:18,147 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:18,159 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-12-21 09:43:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:43:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-12-21 09:43:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:18,160 INFO L225 Difference]: With dead ends: 44 [2021-12-21 09:43:18,160 INFO L226 Difference]: Without dead ends: 27 [2021-12-21 09:43:18,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:43:18,162 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:18,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:43:18,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-21 09:43:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-12-21 09:43:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-12-21 09:43:18,166 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2021-12-21 09:43:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:18,166 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-12-21 09:43:18,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-12-21 09:43:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 09:43:18,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:18,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:18,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:18,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 09:43:18,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2021-12-21 09:43:18,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:18,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309661381] [2021-12-21 09:43:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:18,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 09:43:18,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:18,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309661381] [2021-12-21 09:43:18,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309661381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:18,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027030962] [2021-12-21 09:43:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:18,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:18,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:18,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:18,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:43:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 09:43:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 09:43:18,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 09:43:18,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027030962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:18,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:18,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 09:43:18,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921286533] [2021-12-21 09:43:18,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:18,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 09:43:18,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 09:43:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:43:18,580 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2021-12-21 09:43:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:18,601 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2021-12-21 09:43:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 09:43:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 17 [2021-12-21 09:43:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:18,602 INFO L225 Difference]: With dead ends: 49 [2021-12-21 09:43:18,602 INFO L226 Difference]: Without dead ends: 30 [2021-12-21 09:43:18,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:43:18,604 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:18,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:43:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-21 09:43:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-21 09:43:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-21 09:43:18,609 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2021-12-21 09:43:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:18,610 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-21 09:43:18,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2021-12-21 09:43:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-21 09:43:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 09:43:18,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:18,611 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:18,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:18,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:18,827 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:18,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1612157157, now seen corresponding path program 2 times [2021-12-21 09:43:18,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697709061] [2021-12-21 09:43:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:18,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 09:43:18,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:18,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697709061] [2021-12-21 09:43:18,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697709061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:18,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015676786] [2021-12-21 09:43:18,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:43:18,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:18,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:18,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:18,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:43:18,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:43:18,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:43:18,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:43:18,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 09:43:18,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 09:43:19,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015676786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:19,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:19,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-21 09:43:19,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114167496] [2021-12-21 09:43:19,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:19,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 09:43:19,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 09:43:19,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-21 09:43:19,068 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:19,116 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2021-12-21 09:43:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 09:43:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-12-21 09:43:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:19,118 INFO L225 Difference]: With dead ends: 70 [2021-12-21 09:43:19,118 INFO L226 Difference]: Without dead ends: 51 [2021-12-21 09:43:19,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-21 09:43:19,119 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:19,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:43:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-21 09:43:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-12-21 09:43:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-21 09:43:19,140 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 23 [2021-12-21 09:43:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:19,141 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-21 09:43:19,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-21 09:43:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 09:43:19,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:19,143 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:19,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:19,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:19,359 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1679231593, now seen corresponding path program 3 times [2021-12-21 09:43:19,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:19,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675717693] [2021-12-21 09:43:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:19,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 09:43:19,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:19,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675717693] [2021-12-21 09:43:19,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675717693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:19,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455874291] [2021-12-21 09:43:19,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:43:19,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:19,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:19,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 09:43:19,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 09:43:19,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:43:19,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 09:43:19,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 09:43:19,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 09:43:19,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455874291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:19,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:19,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-21 09:43:19,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939638938] [2021-12-21 09:43:19,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:19,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 09:43:19,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 09:43:19,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-21 09:43:19,619 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:19,650 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2021-12-21 09:43:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 09:43:19,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 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 38 [2021-12-21 09:43:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:19,651 INFO L225 Difference]: With dead ends: 94 [2021-12-21 09:43:19,651 INFO L226 Difference]: Without dead ends: 71 [2021-12-21 09:43:19,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-21 09:43:19,652 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:19,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:43:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-21 09:43:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-21 09:43:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-12-21 09:43:19,657 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 38 [2021-12-21 09:43:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:19,657 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-12-21 09:43:19,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-12-21 09:43:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 09:43:19,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:19,658 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:19,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:19,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:19,875 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 4 times [2021-12-21 09:43:19,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:19,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492968676] [2021-12-21 09:43:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:19,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 09:43:19,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:19,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492968676] [2021-12-21 09:43:19,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492968676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:19,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136754766] [2021-12-21 09:43:19,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:43:19,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:19,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:19,998 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:19,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 09:43:20,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:43:20,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:43:20,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:43:20,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 09:43:20,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 09:43:20,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136754766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:20,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:20,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-21 09:43:20,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936386140] [2021-12-21 09:43:20,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:20,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 09:43:20,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 09:43:20,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:43:20,353 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:20,417 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2021-12-21 09:43:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:43:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 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 50 [2021-12-21 09:43:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:20,419 INFO L225 Difference]: With dead ends: 143 [2021-12-21 09:43:20,419 INFO L226 Difference]: Without dead ends: 95 [2021-12-21 09:43:20,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:43:20,421 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:20,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 78 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:43:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-21 09:43:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-21 09:43:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 94 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2021-12-21 09:43:20,442 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 50 [2021-12-21 09:43:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:20,443 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2021-12-21 09:43:20,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2021-12-21 09:43:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 09:43:20,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:20,444 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:20,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:20,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:20,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:20,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2132388991, now seen corresponding path program 5 times [2021-12-21 09:43:20,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:20,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324176732] [2021-12-21 09:43:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:20,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 09:43:21,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324176732] [2021-12-21 09:43:21,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324176732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819258718] [2021-12-21 09:43:21,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:43:21,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:21,015 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:21,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 09:43:21,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-21 09:43:21,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:43:21,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 09:43:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-21 09:43:21,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-21 09:43:21,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819258718] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:21,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:21,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2021-12-21 09:43:21,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547719487] [2021-12-21 09:43:21,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:21,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-21 09:43:21,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:21,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-21 09:43:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 09:43:21,839 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:21,948 INFO L93 Difference]: Finished difference Result 194 states and 258 transitions. [2021-12-21 09:43:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-21 09:43:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 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 74 [2021-12-21 09:43:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:21,949 INFO L225 Difference]: With dead ends: 194 [2021-12-21 09:43:21,949 INFO L226 Difference]: Without dead ends: 146 [2021-12-21 09:43:21,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 09:43:21,951 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:21,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 123 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:43:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-21 09:43:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-12-21 09:43:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2291666666666667) internal successors, (177), 144 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2021-12-21 09:43:21,957 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 74 [2021-12-21 09:43:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:21,957 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2021-12-21 09:43:21,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2021-12-21 09:43:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-21 09:43:21,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:21,959 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:21,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:22,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:22,175 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:22,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash -478169085, now seen corresponding path program 6 times [2021-12-21 09:43:22,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:22,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528859698] [2021-12-21 09:43:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:22,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-12-21 09:43:22,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:22,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528859698] [2021-12-21 09:43:22,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528859698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:22,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385203385] [2021-12-21 09:43:22,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:43:22,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:22,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:22,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:22,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 09:43:22,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-21 09:43:22,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:43:22,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 09:43:22,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:23,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 09:43:23,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-21 09:43:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 72 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-12-21 09:43:23,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:23,229 INFO L353 Elim1Store]: treesize reduction 56, result has 31.7 percent of original size [2021-12-21 09:43:23,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 32 [2021-12-21 09:43:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2021-12-21 09:43:23,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385203385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:23,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:23,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 8] total 39 [2021-12-21 09:43:23,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238502277] [2021-12-21 09:43:23,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:23,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-21 09:43:23,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:23,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-21 09:43:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 09:43:23,311 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:23,925 INFO L93 Difference]: Finished difference Result 263 states and 333 transitions. [2021-12-21 09:43:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-21 09:43:23,926 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 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 100 [2021-12-21 09:43:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:23,926 INFO L225 Difference]: With dead ends: 263 [2021-12-21 09:43:23,926 INFO L226 Difference]: Without dead ends: 167 [2021-12-21 09:43:23,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-12-21 09:43:23,929 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:23,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 185 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:43:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-21 09:43:23,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-12-21 09:43:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.221476510067114) internal successors, (182), 149 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 182 transitions. [2021-12-21 09:43:23,937 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 182 transitions. Word has length 100 [2021-12-21 09:43:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:23,937 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 182 transitions. [2021-12-21 09:43:23,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 182 transitions. [2021-12-21 09:43:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 09:43:23,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:23,938 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:23,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:24,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-21 09:43:24,139 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:24,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1178743045, now seen corresponding path program 1 times [2021-12-21 09:43:24,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:24,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336996682] [2021-12-21 09:43:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:24,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-21 09:43:24,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:24,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336996682] [2021-12-21 09:43:24,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336996682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:24,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614153671] [2021-12-21 09:43:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:24,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:24,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:24,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:24,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 09:43:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:24,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 09:43:24,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-21 09:43:24,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-21 09:43:25,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614153671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:25,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:25,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-12-21 09:43:25,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423922253] [2021-12-21 09:43:25,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:25,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-21 09:43:25,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:25,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-21 09:43:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 09:43:25,505 INFO L87 Difference]: Start difference. First operand 150 states and 182 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:25,611 INFO L93 Difference]: Finished difference Result 301 states and 390 transitions. [2021-12-21 09:43:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-21 09:43:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 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 106 [2021-12-21 09:43:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:25,613 INFO L225 Difference]: With dead ends: 301 [2021-12-21 09:43:25,613 INFO L226 Difference]: Without dead ends: 202 [2021-12-21 09:43:25,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 09:43:25,615 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:25,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 78 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:43:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-21 09:43:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-21 09:43:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.164179104477612) internal successors, (234), 201 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 234 transitions. [2021-12-21 09:43:25,623 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 234 transitions. Word has length 106 [2021-12-21 09:43:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:25,623 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 234 transitions. [2021-12-21 09:43:25,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 234 transitions. [2021-12-21 09:43:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-21 09:43:25,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:25,627 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:25,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:25,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 09:43:25,847 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:25,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:25,848 INFO L85 PathProgramCache]: Analyzing trace with hash -619301457, now seen corresponding path program 2 times [2021-12-21 09:43:25,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:25,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223041679] [2021-12-21 09:43:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:25,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-21 09:43:26,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:26,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223041679] [2021-12-21 09:43:26,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223041679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:26,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594693380] [2021-12-21 09:43:26,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:43:26,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:26,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:26,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:26,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 09:43:27,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:43:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:43:27,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-21 09:43:27,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-21 09:43:27,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-21 09:43:29,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594693380] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:29,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:29,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2021-12-21 09:43:29,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293099368] [2021-12-21 09:43:29,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:29,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-21 09:43:29,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-21 09:43:29,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-21 09:43:29,711 INFO L87 Difference]: Start difference. First operand 202 states and 234 transitions. Second operand has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:29,931 INFO L93 Difference]: Finished difference Result 405 states and 520 transitions. [2021-12-21 09:43:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-21 09:43:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 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 158 [2021-12-21 09:43:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:29,933 INFO L225 Difference]: With dead ends: 405 [2021-12-21 09:43:29,933 INFO L226 Difference]: Without dead ends: 306 [2021-12-21 09:43:29,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-21 09:43:29,937 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:29,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 116 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:43:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-21 09:43:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2021-12-21 09:43:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1081967213114754) internal successors, (338), 305 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 338 transitions. [2021-12-21 09:43:29,944 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 338 transitions. Word has length 158 [2021-12-21 09:43:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:29,945 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 338 transitions. [2021-12-21 09:43:29,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 338 transitions. [2021-12-21 09:43:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-21 09:43:29,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:29,947 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:29,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:30,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 09:43:30,163 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash -535466729, now seen corresponding path program 3 times [2021-12-21 09:43:30,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:30,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978188451] [2021-12-21 09:43:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:30,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-21 09:43:33,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:33,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978188451] [2021-12-21 09:43:33,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978188451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:33,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489481945] [2021-12-21 09:43:33,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:43:33,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:33,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:33,446 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:33,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 09:43:33,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-21 09:43:33,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:43:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 09:43:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:34,456 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-21 09:43:34,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 13 [2021-12-21 09:43:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 1 proven. 67 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2021-12-21 09:43:34,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:35,181 INFO L353 Elim1Store]: treesize reduction 87, result has 34.6 percent of original size [2021-12-21 09:43:35,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 55 [2021-12-21 09:43:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2021-12-21 09:43:35,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489481945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:35,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:35,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 12, 12] total 122 [2021-12-21 09:43:35,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170259176] [2021-12-21 09:43:35,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:35,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-21 09:43:35,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-21 09:43:35,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5534, Invalid=9228, Unknown=0, NotChecked=0, Total=14762 [2021-12-21 09:43:35,474 INFO L87 Difference]: Start difference. First operand 306 states and 338 transitions. Second operand has 122 states, 122 states have (on average 2.1311475409836067) internal successors, (260), 122 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:36,686 INFO L93 Difference]: Finished difference Result 473 states and 558 transitions. [2021-12-21 09:43:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-21 09:43:36,686 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.1311475409836067) internal successors, (260), 122 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2021-12-21 09:43:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:36,689 INFO L225 Difference]: With dead ends: 473 [2021-12-21 09:43:36,689 INFO L226 Difference]: Without dead ends: 374 [2021-12-21 09:43:36,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 504 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5647, Invalid=12443, Unknown=0, NotChecked=0, Total=18090 [2021-12-21 09:43:36,693 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 182 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:36,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 277 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 09:43:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-21 09:43:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 312. [2021-12-21 09:43:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.1061093247588425) internal successors, (344), 311 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 344 transitions. [2021-12-21 09:43:36,725 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 344 transitions. Word has length 262 [2021-12-21 09:43:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:36,725 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 344 transitions. [2021-12-21 09:43:36,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.1311475409836067) internal successors, (260), 122 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 344 transitions. [2021-12-21 09:43:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-21 09:43:36,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:36,727 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:36,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-21 09:43:36,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 09:43:36,944 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2104195471, now seen corresponding path program 4 times [2021-12-21 09:43:36,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:36,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354551780] [2021-12-21 09:43:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:36,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:43:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10905 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-12-21 09:43:40,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:43:40,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354551780] [2021-12-21 09:43:40,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354551780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:43:40,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933359675] [2021-12-21 09:43:40,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:43:40,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:43:40,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:43:40,282 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:43:40,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 09:43:40,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:43:40,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:43:40,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-21 09:43:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:43:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10905 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-12-21 09:43:40,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:43:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10905 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-12-21 09:43:50,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933359675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:43:50,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:43:50,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2021-12-21 09:43:50,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735864709] [2021-12-21 09:43:50,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:43:50,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2021-12-21 09:43:50,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:43:50,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2021-12-21 09:43:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2021-12-21 09:43:50,215 INFO L87 Difference]: Start difference. First operand 312 states and 344 transitions. Second operand has 211 states, 211 states have (on average 2.061611374407583) internal successors, (435), 211 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) [2021-12-21 09:43:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:43:50,831 INFO L93 Difference]: Finished difference Result 625 states and 793 transitions. [2021-12-21 09:43:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2021-12-21 09:43:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 2.061611374407583) internal successors, (435), 211 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) Word has length 268 [2021-12-21 09:43:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:43:50,834 INFO L225 Difference]: With dead ends: 625 [2021-12-21 09:43:50,834 INFO L226 Difference]: Without dead ends: 522 [2021-12-21 09:43:50,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2021-12-21 09:43:50,845 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 208 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:43:50,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 192 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 09:43:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-12-21 09:43:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-12-21 09:43:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.0633397312859885) internal successors, (554), 521 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:43:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 554 transitions. [2021-12-21 09:43:50,856 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 554 transitions. Word has length 268 [2021-12-21 09:43:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:43:50,856 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 554 transitions. [2021-12-21 09:43:50,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 2.061611374407583) internal successors, (435), 211 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) [2021-12-21 09:43:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 554 transitions. [2021-12-21 09:43:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-12-21 09:43:50,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:43:50,861 INFO L514 BasicCegarLoop]: trace histogram [208, 208, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:43:50,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 09:43:51,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 09:43:51,074 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:43:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:43:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1936891295, now seen corresponding path program 5 times [2021-12-21 09:43:51,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:43:51,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196016049] [2021-12-21 09:43:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:43:51,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:43:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:44:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 43560 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-12-21 09:44:03,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:44:03,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196016049] [2021-12-21 09:44:03,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196016049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:44:03,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897074268] [2021-12-21 09:44:03,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:44:03,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:44:03,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:44:03,136 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:44:03,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process