./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/bor2.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-crafted/bor2.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 5a66d4c531614f6a758ec8a672ead44330d05e74c75b0a444a0f213a0e825065 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:59:40,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:59:40,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:59:40,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:59:40,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:59:40,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:59:40,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:59:40,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:59:40,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:59:40,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:59:40,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:59:40,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:59:40,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:59:40,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:59:40,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:59:40,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:59:40,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:59:40,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:59:40,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:59:40,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:59:40,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:59:40,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:59:40,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:59:40,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:59:40,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:59:40,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:59:40,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:59:40,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:59:40,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:59:41,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:59:41,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:59:41,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:59:41,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:59:41,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:59:41,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:59:41,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:59:41,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:59:41,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:59:41,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:59:41,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:59:41,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:59:41,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:59:41,043 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:59:41,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:59:41,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:59:41,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:59:41,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:59:41,045 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:59:41,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:59:41,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:59:41,046 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:59:41,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:59:41,047 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:59:41,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:59:41,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:59:41,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:59:41,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:59:41,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:59:41,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:59:41,048 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:59:41,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:59:41,048 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:59:41,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:59:41,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:59:41,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:59:41,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:59:41,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:59:41,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:59:41,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:59:41,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:59:41,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:59:41,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:59:41,050 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:59:41,050 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:59:41,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:59:41,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:59:41,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a66d4c531614f6a758ec8a672ead44330d05e74c75b0a444a0f213a0e825065 [2021-12-21 09:59:41,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:59:41,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:59:41,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:59:41,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:59:41,388 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:59:41,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bor2.i [2021-12-21 09:59:41,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b54668f6/ff90e1f0f6194fdcb7e73a986232819b/FLAG11a5fadd5 [2021-12-21 09:59:41,877 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:59:41,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor2.i [2021-12-21 09:59:41,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b54668f6/ff90e1f0f6194fdcb7e73a986232819b/FLAG11a5fadd5 [2021-12-21 09:59:42,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b54668f6/ff90e1f0f6194fdcb7e73a986232819b [2021-12-21 09:59:42,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:59:42,284 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:59:42,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:59:42,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:59:42,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:59:42,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651b715a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42, skipping insertion in model container [2021-12-21 09:59:42,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:59:42,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:59:42,502 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-crafted/bor2.i[1291,1304] [2021-12-21 09:59:42,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:59:42,513 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:59:42,551 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-crafted/bor2.i[1291,1304] [2021-12-21 09:59:42,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:59:42,570 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:59:42,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42 WrapperNode [2021-12-21 09:59:42,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:59:42,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:59:42,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:59:42,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:59:42,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,616 INFO L137 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2021-12-21 09:59:42,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:59:42,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:59:42,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:59:42,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:59:42,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:59:42,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:59:42,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:59:42,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:59:42,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (1/1) ... [2021-12-21 09:59:42,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:59:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:42,701 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 09:59:42,723 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 09:59:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:59:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2021-12-21 09:59:42,744 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2021-12-21 09:59:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:59:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 09:59:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:59:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:59:42,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:59:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:59:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 09:59:42,825 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:59:42,827 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:59:42,959 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:59:42,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:59:42,966 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 09:59:42,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:59:42 BoogieIcfgContainer [2021-12-21 09:59:42,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:59:42,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:59:42,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:59:42,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:59:42,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:59:42" (1/3) ... [2021-12-21 09:59:42,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7a1fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:59:42, skipping insertion in model container [2021-12-21 09:59:42,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:59:42" (2/3) ... [2021-12-21 09:59:42,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7a1fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:59:42, skipping insertion in model container [2021-12-21 09:59:42,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:59:42" (3/3) ... [2021-12-21 09:59:42,981 INFO L111 eAbstractionObserver]: Analyzing ICFG bor2.i [2021-12-21 09:59:42,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:59:43,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:59:43,058 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:59:43,078 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 09:59:43,091 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:59:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 09:59:43,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:43,116 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:43,116 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2021-12-21 09:59:43,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016155471] [2021-12-21 09:59:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:43,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:43,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 09:59:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:43,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 09:59:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:43,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:59:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 09:59:43,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:43,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016155471] [2021-12-21 09:59:43,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016155471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:43,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036742838] [2021-12-21 09:59:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:43,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:43,479 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 09:59:43,480 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 09:59:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:43,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 09:59:43,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 09:59:43,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 09:59:43,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036742838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:59:43,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 09:59:43,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 09:59:43,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559680815] [2021-12-21 09:59:43,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:59:43,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:59:43,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:43,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:59:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:59:43,716 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 09:59:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:43,750 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-21 09:59:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:59:43,753 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-21 09:59:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:43,759 INFO L225 Difference]: With dead ends: 50 [2021-12-21 09:59:43,760 INFO L226 Difference]: Without dead ends: 24 [2021-12-21 09:59:43,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:59:43,771 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 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 09:59:43,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:59:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-21 09:59:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-21 09:59:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-21 09:59:43,814 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2021-12-21 09:59:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:43,815 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-21 09:59:43,816 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 09:59:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-21 09:59:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 09:59:43,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:43,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:43,849 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 09:59:44,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-21 09:59:44,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2021-12-21 09:59:44,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:44,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982990626] [2021-12-21 09:59:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:44,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-21 09:59:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 09:59:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 09:59:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 09:59:44,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:44,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982990626] [2021-12-21 09:59:44,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982990626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:44,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952225126] [2021-12-21 09:59:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:44,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:44,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:44,124 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 09:59:44,126 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 09:59:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 09:59:44,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 09:59:44,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 09:59:44,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952225126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:59:44,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 09:59:44,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 09:59:44,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792756349] [2021-12-21 09:59:44,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:59:44,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:59:44,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:59:44,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:59:44,251 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 09:59:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:44,260 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-21 09:59:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:59:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-21 09:59:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:44,261 INFO L225 Difference]: With dead ends: 42 [2021-12-21 09:59:44,261 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 09:59:44,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 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 09:59:44,272 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 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 09:59:44,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:59:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 09:59:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-21 09:59:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-21 09:59:44,278 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2021-12-21 09:59:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:44,279 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-21 09:59:44,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 09:59:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-21 09:59:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 09:59:44,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:44,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:44,301 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 09:59:44,494 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,SelfDestructingSolverStorable1 [2021-12-21 09:59:44,495 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:44,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:44,495 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2021-12-21 09:59:44,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:44,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785767110] [2021-12-21 09:59:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:44,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-21 09:59:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 09:59:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:59:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 09:59:44,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785767110] [2021-12-21 09:59:44,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785767110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:44,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828182703] [2021-12-21 09:59:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:44,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:44,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:44,614 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 09:59:44,615 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 09:59:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:44,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 09:59:44,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 09:59:44,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 09:59:44,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828182703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:59:44,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 09:59:44,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 09:59:44,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775109883] [2021-12-21 09:59:44,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:59:44,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:59:44,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:59:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:59:44,753 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 09:59:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:44,763 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-21 09:59:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:59:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-21 09:59:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:44,764 INFO L225 Difference]: With dead ends: 39 [2021-12-21 09:59:44,765 INFO L226 Difference]: Without dead ends: 26 [2021-12-21 09:59:44,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:59:44,766 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:59:44,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:59:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-21 09:59:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-21 09:59:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-21 09:59:44,771 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2021-12-21 09:59:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:44,776 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-21 09:59:44,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 09:59:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-21 09:59:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 09:59:44,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:44,781 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:44,799 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 09:59:44,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:44,982 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:44,982 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2021-12-21 09:59:44,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:44,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611240899] [2021-12-21 09:59:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:44,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:45,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-21 09:59:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:45,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 09:59:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:45,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 09:59:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 09:59:45,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611240899] [2021-12-21 09:59:45,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611240899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:45,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079228239] [2021-12-21 09:59:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:45,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:45,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:45,096 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 09:59:45,122 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 09:59:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 09:59:45,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 09:59:45,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:59:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 09:59:45,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079228239] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:59:45,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:59:45,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-21 09:59:45,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179768868] [2021-12-21 09:59:45,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:59:45,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 09:59:45,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:45,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 09:59:45,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-21 09:59:45,343 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:59:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:45,388 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-12-21 09:59:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 09:59:45,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2021-12-21 09:59:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:45,392 INFO L225 Difference]: With dead ends: 54 [2021-12-21 09:59:45,392 INFO L226 Difference]: Without dead ends: 34 [2021-12-21 09:59:45,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-21 09:59:45,394 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:59:45,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:59:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-21 09:59:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-21 09:59:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-21 09:59:45,400 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2021-12-21 09:59:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:45,400 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-21 09:59:45,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:59:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-21 09:59:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 09:59:45,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:45,402 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:45,431 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 09:59:45,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:45,627 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2021-12-21 09:59:45,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:45,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946194567] [2021-12-21 09:59:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:45,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:45,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 09:59:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:45,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 09:59:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:45,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 09:59:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-21 09:59:45,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:45,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946194567] [2021-12-21 09:59:45,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946194567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:45,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457450746] [2021-12-21 09:59:45,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:59:45,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:45,742 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 09:59:45,742 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 09:59:45,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:59:45,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:59:45,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:59:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 09:59:45,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:59:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 09:59:46,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457450746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:59:46,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:59:46,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-21 09:59:46,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2232998] [2021-12-21 09:59:46,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:59:46,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 09:59:46,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:46,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 09:59:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-21 09:59:46,029 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 09:59:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:46,087 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-12-21 09:59:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 09:59:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2021-12-21 09:59:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:46,088 INFO L225 Difference]: With dead ends: 70 [2021-12-21 09:59:46,088 INFO L226 Difference]: Without dead ends: 48 [2021-12-21 09:59:46,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 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 09:59:46,090 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:59:46,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:59:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-21 09:59:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-21 09:59:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-12-21 09:59:46,097 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2021-12-21 09:59:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:46,097 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-12-21 09:59:46,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 09:59:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-12-21 09:59:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 09:59:46,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:46,099 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:46,118 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 09:59:46,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:46,304 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2021-12-21 09:59:46,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:46,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11618045] [2021-12-21 09:59:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:46,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:46,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:59:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:46,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 09:59:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:46,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 09:59:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-21 09:59:46,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:46,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11618045] [2021-12-21 09:59:46,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11618045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:46,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040043291] [2021-12-21 09:59:46,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:59:46,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:46,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:46,437 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 09:59:46,438 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 09:59:46,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 09:59:46,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:59:46,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 09:59:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-21 09:59:46,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:59:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-21 09:59:46,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040043291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:59:46,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:59:46,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 09:59:46,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099679484] [2021-12-21 09:59:46,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:59:46,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 09:59:46,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:46,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 09:59:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-21 09:59:46,750 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 09:59:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:46,784 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-12-21 09:59:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 09:59:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2021-12-21 09:59:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:46,785 INFO L225 Difference]: With dead ends: 78 [2021-12-21 09:59:46,785 INFO L226 Difference]: Without dead ends: 55 [2021-12-21 09:59:46,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-21 09:59:46,787 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:59:46,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:59:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-21 09:59:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-21 09:59:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-12-21 09:59:46,794 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 64 [2021-12-21 09:59:46,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:46,794 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-12-21 09:59:46,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 09:59:46,795 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-12-21 09:59:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 09:59:46,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:46,796 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:46,815 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 09:59:47,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:47,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:47,004 INFO L85 PathProgramCache]: Analyzing trace with hash 571451455, now seen corresponding path program 4 times [2021-12-21 09:59:47,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:47,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732502722] [2021-12-21 09:59:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:47,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:47,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:59:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:47,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 09:59:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:47,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 09:59:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-21 09:59:47,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:47,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732502722] [2021-12-21 09:59:47,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732502722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:47,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012204314] [2021-12-21 09:59:47,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:59:47,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:47,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:47,174 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 09:59:47,186 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 09:59:47,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:59:47,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:59:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:59:47,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-21 09:59:47,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:59:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-21 09:59:47,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012204314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:59:47,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:59:47,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-21 09:59:47,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913743622] [2021-12-21 09:59:47,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:59:47,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 09:59:47,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:47,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 09:59:47,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:59:47,744 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:59:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:47,822 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2021-12-21 09:59:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:59:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 88 [2021-12-21 09:59:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:47,824 INFO L225 Difference]: With dead ends: 111 [2021-12-21 09:59:47,824 INFO L226 Difference]: Without dead ends: 79 [2021-12-21 09:59:47,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 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 09:59:47,826 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:59:47,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 112 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:59:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-21 09:59:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-12-21 09:59:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-12-21 09:59:47,834 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 88 [2021-12-21 09:59:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:47,835 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-12-21 09:59:47,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:59:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-12-21 09:59:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 09:59:47,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:47,837 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:47,866 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 09:59:48,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:48,055 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:48,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1629281449, now seen corresponding path program 5 times [2021-12-21 09:59:48,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:48,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142232661] [2021-12-21 09:59:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:48,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:48,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 09:59:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:48,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 09:59:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:48,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 09:59:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-21 09:59:48,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:48,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142232661] [2021-12-21 09:59:48,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142232661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:48,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263530396] [2021-12-21 09:59:48,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:59:48,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:48,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:48,473 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 09:59:48,475 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 09:59:49,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-21 09:59:49,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:59:49,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 09:59:49,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-12-21 09:59:49,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:59:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-12-21 09:59:49,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263530396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:59:49,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:59:49,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2021-12-21 09:59:49,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780235429] [2021-12-21 09:59:49,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:59:49,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-21 09:59:49,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:49,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-21 09:59:49,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 09:59:49,962 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 09:59:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:50,081 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2021-12-21 09:59:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-21 09:59:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2021-12-21 09:59:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:50,084 INFO L225 Difference]: With dead ends: 130 [2021-12-21 09:59:50,085 INFO L226 Difference]: Without dead ends: 98 [2021-12-21 09:59:50,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 216 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 09:59:50,087 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:59:50,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:59:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-21 09:59:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-12-21 09:59:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-12-21 09:59:50,110 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 112 [2021-12-21 09:59:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:50,110 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-12-21 09:59:50,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 09:59:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-12-21 09:59:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 09:59:50,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:50,113 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:50,135 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 09:59:50,319 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,SelfDestructingSolverStorable7 [2021-12-21 09:59:50,320 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1848671305, now seen corresponding path program 6 times [2021-12-21 09:59:50,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804849746] [2021-12-21 09:59:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:50,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:50,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 09:59:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:50,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 09:59:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-21 09:59:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2021-12-21 09:59:50,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:50,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804849746] [2021-12-21 09:59:50,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804849746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582412596] [2021-12-21 09:59:50,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:59:50,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:50,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:50,708 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 09:59:50,732 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 09:59:50,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-21 09:59:50,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:59:50,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 09:59:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 850 proven. 4 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2021-12-21 09:59:51,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:59:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2021-12-21 09:59:51,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582412596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:59:51,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:59:51,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2021-12-21 09:59:51,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610898305] [2021-12-21 09:59:51,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:59:51,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 09:59:51,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:51,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 09:59:51,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-12-21 09:59:51,368 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 09:59:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:51,468 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-12-21 09:59:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-21 09:59:51,468 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 162 [2021-12-21 09:59:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:51,469 INFO L225 Difference]: With dead ends: 156 [2021-12-21 09:59:51,469 INFO L226 Difference]: Without dead ends: 108 [2021-12-21 09:59:51,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-12-21 09:59:51,471 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:59:51,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:59:51,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-21 09:59:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-12-21 09:59:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-12-21 09:59:51,485 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 162 [2021-12-21 09:59:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:51,486 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-12-21 09:59:51,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 09:59:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-12-21 09:59:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-21 09:59:51,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:51,496 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:51,526 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 09:59:51,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:51,724 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash -627674557, now seen corresponding path program 7 times [2021-12-21 09:59:51,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:51,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415256833] [2021-12-21 09:59:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:51,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:52,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 09:59:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:52,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 09:59:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:52,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-21 09:59:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-21 09:59:52,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:52,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415256833] [2021-12-21 09:59:52,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415256833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10592998] [2021-12-21 09:59:52,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 09:59:52,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:52,097 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 09:59:52,124 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 09:59:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 09:59:52,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-21 09:59:52,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:59:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-21 09:59:53,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10592998] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:59:53,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:59:53,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-12-21 09:59:53,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572105340] [2021-12-21 09:59:53,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:59:53,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-21 09:59:53,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:53,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-21 09:59:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 09:59:53,418 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:59:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:53,570 INFO L93 Difference]: Finished difference Result 215 states and 248 transitions. [2021-12-21 09:59:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-21 09:59:53,571 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 172 [2021-12-21 09:59:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:53,573 INFO L225 Difference]: With dead ends: 215 [2021-12-21 09:59:53,573 INFO L226 Difference]: Without dead ends: 159 [2021-12-21 09:59:53,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 09:59:53,576 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:59:53,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 112 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:59:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-21 09:59:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-12-21 09:59:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2021-12-21 09:59:53,611 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 172 [2021-12-21 09:59:53,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:53,611 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2021-12-21 09:59:53,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:59:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2021-12-21 09:59:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-21 09:59:53,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:53,615 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:53,644 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 09:59:53,816 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,SelfDestructingSolverStorable9 [2021-12-21 09:59:53,816 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1171263479, now seen corresponding path program 8 times [2021-12-21 09:59:53,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:53,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123829415] [2021-12-21 09:59:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:53,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:54,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-21 09:59:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:54,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-21 09:59:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:54,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-21 09:59:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:59:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-21 09:59:55,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:59:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123829415] [2021-12-21 09:59:55,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123829415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:59:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604048206] [2021-12-21 09:59:55,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:59:55,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:59:55,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:59:55,009 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 09:59:55,020 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 09:59:55,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:59:55,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:59:55,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-21 09:59:55,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:59:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-21 09:59:55,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:59:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-21 09:59:58,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604048206] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:59:58,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:59:58,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2021-12-21 09:59:58,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388238735] [2021-12-21 09:59:58,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:59:58,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-21 09:59:58,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:59:58,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-21 09:59:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-21 09:59:58,308 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:59:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:59:58,575 INFO L93 Difference]: Finished difference Result 319 states and 378 transitions. [2021-12-21 09:59:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-21 09:59:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 224 [2021-12-21 09:59:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:59:58,577 INFO L225 Difference]: With dead ends: 319 [2021-12-21 09:59:58,577 INFO L226 Difference]: Without dead ends: 263 [2021-12-21 09:59:58,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-21 09:59:58,580 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 153 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 178 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 09:59:58,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 178 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:59:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-21 09:59:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-21 09:59:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:59:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 267 transitions. [2021-12-21 09:59:58,589 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 267 transitions. Word has length 224 [2021-12-21 09:59:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:59:58,590 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 267 transitions. [2021-12-21 09:59:58,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:59:58,590 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 267 transitions. [2021-12-21 09:59:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-21 09:59:58,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:59:58,594 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:59:58,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 09:59:58,815 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,SelfDestructingSolverStorable10 [2021-12-21 09:59:58,815 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:59:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:59:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1664693599, now seen corresponding path program 9 times [2021-12-21 09:59:58,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:59:58,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005264258] [2021-12-21 09:59:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:59:58,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:59:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:02,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-21 10:00:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:02,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-12-21 10:00:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:02,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2021-12-21 10:00:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-21 10:00:02,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:00:02,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005264258] [2021-12-21 10:00:02,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005264258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:00:02,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227922778] [2021-12-21 10:00:02,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:00:02,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:00:02,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:00:02,362 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 10:00:02,364 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 10:00:02,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 10:00:02,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:00:02,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:00:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:00:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 11417 trivial. 0 not checked. [2021-12-21 10:00:03,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:00:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12267 trivial. 0 not checked. [2021-12-21 10:00:03,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227922778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:00:03,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:00:03,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 9, 9] total 119 [2021-12-21 10:00:03,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141502038] [2021-12-21 10:00:03,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:00:03,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-21 10:00:03,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:00:03,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-21 10:00:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2021-12-21 10:00:03,845 INFO L87 Difference]: Start difference. First operand 263 states and 267 transitions. Second operand has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:00:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:00:04,156 INFO L93 Difference]: Finished difference Result 338 states and 354 transitions. [2021-12-21 10:00:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-21 10:00:04,157 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 328 [2021-12-21 10:00:04,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:00:04,159 INFO L225 Difference]: With dead ends: 338 [2021-12-21 10:00:04,159 INFO L226 Difference]: Without dead ends: 282 [2021-12-21 10:00:04,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2021-12-21 10:00:04,168 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:00:04,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 279 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:00:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-21 10:00:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-12-21 10:00:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0108695652173914) internal successors, (279), 276 states have internal predecessors, (279), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:00:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 285 transitions. [2021-12-21 10:00:04,177 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 285 transitions. Word has length 328 [2021-12-21 10:00:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:00:04,177 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 285 transitions. [2021-12-21 10:00:04,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:00:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 285 transitions. [2021-12-21 10:00:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-21 10:00:04,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:00:04,180 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:00:04,207 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 10:00:04,399 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,SelfDestructingSolverStorable11 [2021-12-21 10:00:04,399 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:00:04,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:00:04,400 INFO L85 PathProgramCache]: Analyzing trace with hash -117033647, now seen corresponding path program 10 times [2021-12-21 10:00:04,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:00:04,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710042142] [2021-12-21 10:00:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:00:04,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:00:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:08,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-12-21 10:00:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:08,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-21 10:00:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:08,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 309 [2021-12-21 10:00:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-21 10:00:08,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:00:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710042142] [2021-12-21 10:00:08,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710042142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:00:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497198335] [2021-12-21 10:00:08,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:00:08,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:00:08,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:00:08,060 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 10:00:08,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 10:00:08,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:00:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:00:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 10:00:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:00:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 1271 proven. 196 refuted. 0 times theorem prover too weak. 11201 trivial. 0 not checked. [2021-12-21 10:00:09,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:00:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 424 proven. 620 refuted. 0 times theorem prover too weak. 11624 trivial. 0 not checked. [2021-12-21 10:00:10,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497198335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:00:10,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:00:10,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 17, 17] total 136 [2021-12-21 10:00:10,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374245662] [2021-12-21 10:00:10,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:00:10,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-12-21 10:00:10,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:00:10,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-12-21 10:00:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6060, Invalid=12300, Unknown=0, NotChecked=0, Total=18360 [2021-12-21 10:00:10,542 INFO L87 Difference]: Start difference. First operand 281 states and 285 transitions. Second operand has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:00:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:00:10,915 INFO L93 Difference]: Finished difference Result 388 states and 415 transitions. [2021-12-21 10:00:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-21 10:00:10,916 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 346 [2021-12-21 10:00:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:00:10,917 INFO L225 Difference]: With dead ends: 388 [2021-12-21 10:00:10,917 INFO L226 Difference]: Without dead ends: 316 [2021-12-21 10:00:10,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6060, Invalid=12300, Unknown=0, NotChecked=0, Total=18360 [2021-12-21 10:00:10,919 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:00:10,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 242 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:00:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-21 10:00:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2021-12-21 10:00:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0096774193548388) internal successors, (313), 310 states have internal predecessors, (313), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:00:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 319 transitions. [2021-12-21 10:00:10,929 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 319 transitions. Word has length 346 [2021-12-21 10:00:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:00:10,929 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 319 transitions. [2021-12-21 10:00:10,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:00:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 319 transitions. [2021-12-21 10:00:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-12-21 10:00:10,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:00:10,932 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 90, 90, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:00:10,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-21 10:00:11,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 10:00:11,143 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:00:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:00:11,144 INFO L85 PathProgramCache]: Analyzing trace with hash -29376077, now seen corresponding path program 11 times [2021-12-21 10:00:11,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:00:11,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305088341] [2021-12-21 10:00:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:00:11,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:00:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:14,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-12-21 10:00:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:14,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2021-12-21 10:00:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:14,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 375 [2021-12-21 10:00:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:00:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19307 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2021-12-21 10:00:14,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:00:14,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305088341] [2021-12-21 10:00:14,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305088341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:00:14,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989340598] [2021-12-21 10:00:14,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:00:14,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:00:14,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:00:14,824 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:00:14,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process