./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_allDiff2_ground.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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 20:34:06,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 20:34:06,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 20:34:07,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 20:34:07,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 20:34:07,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 20:34:07,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 20:34:07,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 20:34:07,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 20:34:07,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 20:34:07,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 20:34:07,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 20:34:07,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 20:34:07,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 20:34:07,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 20:34:07,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 20:34:07,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 20:34:07,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 20:34:07,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 20:34:07,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 20:34:07,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 20:34:07,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 20:34:07,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 20:34:07,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 20:34:07,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 20:34:07,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 20:34:07,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 20:34:07,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 20:34:07,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 20:34:07,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 20:34:07,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 20:34:07,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 20:34:07,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 20:34:07,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 20:34:07,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 20:34:07,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 20:34:07,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 20:34:07,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 20:34:07,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 20:34:07,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 20:34:07,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 20:34:07,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 20:34:07,069 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 20:34:07,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 20:34:07,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 20:34:07,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 20:34:07,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 20:34:07,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 20:34:07,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 20:34:07,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 20:34:07,071 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 20:34:07,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 20:34:07,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 20:34:07,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 20:34:07,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 20:34:07,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 20:34:07,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 20:34:07,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 20:34:07,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 20:34:07,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 20:34:07,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 20:34:07,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 20:34:07,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 20:34:07,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 20:34:07,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 20:34:07,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 20:34:07,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 20:34:07,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 20:34:07,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 20:34:07,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 20:34:07,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 20:34:07,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 20:34:07,075 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 20:34:07,076 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 20:34:07,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 20:34:07,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 20:34:07,076 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2021-12-16 20:34:07,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 20:34:07,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 20:34:07,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 20:34:07,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 20:34:07,323 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 20:34:07,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2021-12-16 20:34:07,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7effb6ac0/6c9476158af648aa9c6b6e89032760e3/FLAG556484cf4 [2021-12-16 20:34:07,728 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 20:34:07,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2021-12-16 20:34:07,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7effb6ac0/6c9476158af648aa9c6b6e89032760e3/FLAG556484cf4 [2021-12-16 20:34:07,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7effb6ac0/6c9476158af648aa9c6b6e89032760e3 [2021-12-16 20:34:07,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 20:34:07,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 20:34:07,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 20:34:07,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 20:34:07,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 20:34:07,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:07,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270243bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07, skipping insertion in model container [2021-12-16 20:34:07,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:07,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 20:34:07,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 20:34:07,932 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2021-12-16 20:34:07,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 20:34:07,958 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 20:34:07,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2021-12-16 20:34:07,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 20:34:07,995 INFO L208 MainTranslator]: Completed translation [2021-12-16 20:34:07,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07 WrapperNode [2021-12-16 20:34:07,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 20:34:07,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 20:34:07,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 20:34:07,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 20:34:08,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,024 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-16 20:34:08,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 20:34:08,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 20:34:08,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 20:34:08,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 20:34:08,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 20:34:08,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 20:34:08,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 20:34:08,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 20:34:08,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (1/1) ... [2021-12-16 20:34:08,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 20:34:08,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:08,101 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) [2021-12-16 20:34:08,117 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 [2021-12-16 20:34:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 20:34:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 20:34:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 20:34:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 20:34:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 20:34:08,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 20:34:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 20:34:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 20:34:08,176 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 20:34:08,177 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 20:34:08,302 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 20:34:08,307 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 20:34:08,307 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-16 20:34:08,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:34:08 BoogieIcfgContainer [2021-12-16 20:34:08,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 20:34:08,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 20:34:08,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 20:34:08,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 20:34:08,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 08:34:07" (1/3) ... [2021-12-16 20:34:08,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f079c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:34:08, skipping insertion in model container [2021-12-16 20:34:08,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:07" (2/3) ... [2021-12-16 20:34:08,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f079c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:34:08, skipping insertion in model container [2021-12-16 20:34:08,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:34:08" (3/3) ... [2021-12-16 20:34:08,325 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2021-12-16 20:34:08,328 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 20:34:08,329 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 20:34:08,357 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 20:34:08,361 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 [2021-12-16 20:34:08,362 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 20:34:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 20:34:08,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:08,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:08,375 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:08,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:08,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1932701392, now seen corresponding path program 1 times [2021-12-16 20:34:08,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:08,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757521925] [2021-12-16 20:34:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:08,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 20:34:08,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:08,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757521925] [2021-12-16 20:34:08,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757521925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 20:34:08,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 20:34:08,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 20:34:08,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444274173] [2021-12-16 20:34:08,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 20:34:08,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 20:34:08,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 20:34:08,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 20:34:08,512 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:08,561 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2021-12-16 20:34:08,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 20:34:08,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-16 20:34:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:08,568 INFO L225 Difference]: With dead ends: 44 [2021-12-16 20:34:08,569 INFO L226 Difference]: Without dead ends: 21 [2021-12-16 20:34:08,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 20:34:08,574 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:08,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 20:34:08,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-16 20:34:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-12-16 20:34:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-12-16 20:34:08,607 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2021-12-16 20:34:08,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:08,607 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-12-16 20:34:08,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-12-16 20:34:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 20:34:08,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:08,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:08,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 20:34:08,609 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:08,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:08,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1277503826, now seen corresponding path program 1 times [2021-12-16 20:34:08,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:08,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727740589] [2021-12-16 20:34:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:08,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 20:34:08,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:08,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727740589] [2021-12-16 20:34:08,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727740589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:08,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164843713] [2021-12-16 20:34:08,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:08,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:08,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:08,665 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) [2021-12-16 20:34:08,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 20:34:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 20:34:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 20:34:08,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 20:34:08,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164843713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 20:34:08,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 20:34:08,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-16 20:34:08,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335379543] [2021-12-16 20:34:08,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 20:34:08,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 20:34:08,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:08,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 20:34:08,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 20:34:08,804 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:08,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:08,844 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-12-16 20:34:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 20:34:08,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 20:34:08,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:08,845 INFO L225 Difference]: With dead ends: 35 [2021-12-16 20:34:08,846 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 20:34:08,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 20:34:08,848 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:08,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 20:34:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 20:34:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-12-16 20:34:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-12-16 20:34:08,856 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-12-16 20:34:08,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:08,856 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-12-16 20:34:08,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-12-16 20:34:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 20:34:08,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:08,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:08,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:09,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:09,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:09,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:09,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1548598205, now seen corresponding path program 1 times [2021-12-16 20:34:09,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:09,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944121822] [2021-12-16 20:34:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:09,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 20:34:09,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:09,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944121822] [2021-12-16 20:34:09,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944121822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:09,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607246961] [2021-12-16 20:34:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:09,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:09,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:09,131 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) [2021-12-16 20:34:09,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 20:34:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:09,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 20:34:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 20:34:09,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 20:34:09,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607246961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:09,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:09,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 20:34:09,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601976954] [2021-12-16 20:34:09,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:09,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 20:34:09,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:09,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 20:34:09,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 20:34:09,271 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:09,335 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-12-16 20:34:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 20:34:09,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 20:34:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:09,336 INFO L225 Difference]: With dead ends: 71 [2021-12-16 20:34:09,336 INFO L226 Difference]: Without dead ends: 55 [2021-12-16 20:34:09,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 20:34:09,338 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:09,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 62 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 20:34:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-16 20:34:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 27. [2021-12-16 20:34:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-16 20:34:09,342 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2021-12-16 20:34:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:09,343 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-16 20:34:09,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-16 20:34:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 20:34:09,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:09,344 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:09,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:09,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-16 20:34:09,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:09,575 INFO L85 PathProgramCache]: Analyzing trace with hash 515426679, now seen corresponding path program 2 times [2021-12-16 20:34:09,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:09,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104655787] [2021-12-16 20:34:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:09,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 20:34:09,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:09,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104655787] [2021-12-16 20:34:09,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104655787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 20:34:09,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 20:34:09,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 20:34:09,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261064075] [2021-12-16 20:34:09,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 20:34:09,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 20:34:09,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:09,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 20:34:09,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 20:34:09,642 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:09,685 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-12-16 20:34:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 20:34:09,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 20:34:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:09,686 INFO L225 Difference]: With dead ends: 46 [2021-12-16 20:34:09,686 INFO L226 Difference]: Without dead ends: 32 [2021-12-16 20:34:09,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 20:34:09,687 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:09,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 46 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 20:34:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-16 20:34:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-16 20:34:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-12-16 20:34:09,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 21 [2021-12-16 20:34:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:09,690 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-12-16 20:34:09,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-12-16 20:34:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 20:34:09,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:09,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:09,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 20:34:09,691 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1658369263, now seen corresponding path program 1 times [2021-12-16 20:34:09,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:09,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618103367] [2021-12-16 20:34:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:09,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 20:34:09,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:09,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618103367] [2021-12-16 20:34:09,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618103367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:09,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261978807] [2021-12-16 20:34:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:09,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:09,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:09,796 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) [2021-12-16 20:34:09,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 20:34:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 20:34:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 20:34:09,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 20:34:10,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261978807] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:10,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:10,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-12-16 20:34:10,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496797826] [2021-12-16 20:34:10,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:10,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 20:34:10,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:10,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 20:34:10,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2021-12-16 20:34:10,045 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:10,326 INFO L93 Difference]: Finished difference Result 97 states and 136 transitions. [2021-12-16 20:34:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 20:34:10,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-16 20:34:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:10,328 INFO L225 Difference]: With dead ends: 97 [2021-12-16 20:34:10,328 INFO L226 Difference]: Without dead ends: 80 [2021-12-16 20:34:10,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-12-16 20:34:10,330 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 192 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:10,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 69 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 20:34:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-16 20:34:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-16 20:34:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:10,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2021-12-16 20:34:10,345 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 24 [2021-12-16 20:34:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:10,346 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2021-12-16 20:34:10,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2021-12-16 20:34:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 20:34:10,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:10,347 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:10,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:10,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:10,564 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1935549725, now seen corresponding path program 2 times [2021-12-16 20:34:10,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:10,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135520681] [2021-12-16 20:34:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:10,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-16 20:34:10,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:10,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135520681] [2021-12-16 20:34:10,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135520681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:10,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765799660] [2021-12-16 20:34:10,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 20:34:10,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:10,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:10,726 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) [2021-12-16 20:34:10,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 20:34:10,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 20:34:10,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:34:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 20:34:10,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-16 20:34:10,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-16 20:34:11,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765799660] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:11,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:11,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-16 20:34:11,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078225552] [2021-12-16 20:34:11,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:11,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 20:34:11,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 20:34:11,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-16 20:34:11,086 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:11,268 INFO L93 Difference]: Finished difference Result 329 states and 430 transitions. [2021-12-16 20:34:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 20:34:11,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-16 20:34:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:11,271 INFO L225 Difference]: With dead ends: 329 [2021-12-16 20:34:11,271 INFO L226 Difference]: Without dead ends: 272 [2021-12-16 20:34:11,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-16 20:34:11,272 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 493 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:11,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 284 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 20:34:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-16 20:34:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 104. [2021-12-16 20:34:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 103 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2021-12-16 20:34:11,283 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 60 [2021-12-16 20:34:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:11,283 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2021-12-16 20:34:11,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2021-12-16 20:34:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-16 20:34:11,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:11,285 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:11,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:11,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:11,500 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:11,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1156211659, now seen corresponding path program 3 times [2021-12-16 20:34:11,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:11,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083803838] [2021-12-16 20:34:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:11,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-16 20:34:11,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083803838] [2021-12-16 20:34:11,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083803838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239780591] [2021-12-16 20:34:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 20:34:11,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:11,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:11,788 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) [2021-12-16 20:34:11,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 20:34:11,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 20:34:11,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:34:11,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 20:34:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2021-12-16 20:34:12,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 20:34:12,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239780591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 20:34:12,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 20:34:12,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2021-12-16 20:34:12,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783376395] [2021-12-16 20:34:12,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 20:34:12,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 20:34:12,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:12,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 20:34:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-12-16 20:34:12,047 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:12,117 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2021-12-16 20:34:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 20:34:12,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-16 20:34:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:12,119 INFO L225 Difference]: With dead ends: 193 [2021-12-16 20:34:12,119 INFO L226 Difference]: Without dead ends: 184 [2021-12-16 20:34:12,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-12-16 20:34:12,120 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:12,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 20:34:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-16 20:34:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 105. [2021-12-16 20:34:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2021-12-16 20:34:12,129 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 84 [2021-12-16 20:34:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:12,130 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2021-12-16 20:34:12,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2021-12-16 20:34:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-16 20:34:12,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:12,132 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:12,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:12,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:12,348 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1290299501, now seen corresponding path program 4 times [2021-12-16 20:34:12,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:12,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163830811] [2021-12-16 20:34:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:12,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-16 20:34:12,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163830811] [2021-12-16 20:34:12,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163830811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405788547] [2021-12-16 20:34:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 20:34:12,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:12,641 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) [2021-12-16 20:34:12,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 20:34:12,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 20:34:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:34:12,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 20:34:12,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-16 20:34:12,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-16 20:34:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405788547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:13,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:13,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-16 20:34:13,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287659098] [2021-12-16 20:34:13,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:13,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-16 20:34:13,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-16 20:34:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 20:34:13,624 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:14,298 INFO L93 Difference]: Finished difference Result 825 states and 1072 transitions. [2021-12-16 20:34:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-16 20:34:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-16 20:34:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:14,302 INFO L225 Difference]: With dead ends: 825 [2021-12-16 20:34:14,303 INFO L226 Difference]: Without dead ends: 767 [2021-12-16 20:34:14,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 20:34:14,305 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2070 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:14,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2070 Valid, 586 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 20:34:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-16 20:34:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 153. [2021-12-16 20:34:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2021-12-16 20:34:14,319 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 87 [2021-12-16 20:34:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:14,319 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2021-12-16 20:34:14,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2021-12-16 20:34:14,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-16 20:34:14,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:14,321 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:14,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:14,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:14,544 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1107291293, now seen corresponding path program 5 times [2021-12-16 20:34:14,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:14,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477388768] [2021-12-16 20:34:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:14,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-16 20:34:15,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:15,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477388768] [2021-12-16 20:34:15,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477388768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:15,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105173867] [2021-12-16 20:34:15,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 20:34:15,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:15,340 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) [2021-12-16 20:34:15,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 20:34:26,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-12-16 20:34:26,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:34:26,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 20:34:26,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2021-12-16 20:34:26,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2021-12-16 20:34:26,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105173867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:26,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:26,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 8, 8] total 60 [2021-12-16 20:34:26,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718008468] [2021-12-16 20:34:26,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:26,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-16 20:34:26,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-16 20:34:26,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=2308, Unknown=0, NotChecked=0, Total=3540 [2021-12-16 20:34:26,697 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:32,203 INFO L93 Difference]: Finished difference Result 913 states and 1240 transitions. [2021-12-16 20:34:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-12-16 20:34:32,203 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-16 20:34:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:32,206 INFO L225 Difference]: With dead ends: 913 [2021-12-16 20:34:32,206 INFO L226 Difference]: Without dead ends: 855 [2021-12-16 20:34:32,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19048 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=17074, Invalid=42218, Unknown=0, NotChecked=0, Total=59292 [2021-12-16 20:34:32,231 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4199 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 1159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4199 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1159 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:32,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4199 Valid, 564 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1159 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 20:34:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-16 20:34:32,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 180. [2021-12-16 20:34:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 179 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2021-12-16 20:34:32,251 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 135 [2021-12-16 20:34:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:32,252 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2021-12-16 20:34:32,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2021-12-16 20:34:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-16 20:34:32,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:32,259 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 15, 15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:32,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:32,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:32,475 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1557114873, now seen corresponding path program 6 times [2021-12-16 20:34:32,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:32,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137334012] [2021-12-16 20:34:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:32,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-12-16 20:34:33,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:33,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137334012] [2021-12-16 20:34:33,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137334012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:33,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599679009] [2021-12-16 20:34:33,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 20:34:33,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:33,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:33,302 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) [2021-12-16 20:34:33,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 20:34:33,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-16 20:34:33,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:34:33,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 20:34:33,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2021-12-16 20:34:33,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2021-12-16 20:34:34,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599679009] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:34,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:34,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 8, 8] total 61 [2021-12-16 20:34:34,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456242958] [2021-12-16 20:34:34,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:34,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-16 20:34:34,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-16 20:34:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1519, Invalid=2141, Unknown=0, NotChecked=0, Total=3660 [2021-12-16 20:34:34,014 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:42,526 INFO L93 Difference]: Finished difference Result 1364 states and 1911 transitions. [2021-12-16 20:34:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 349 states. [2021-12-16 20:34:42,526 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-12-16 20:34:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:42,544 INFO L225 Difference]: With dead ends: 1364 [2021-12-16 20:34:42,544 INFO L226 Difference]: Without dead ends: 1232 [2021-12-16 20:34:42,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47559 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=27227, Invalid=96325, Unknown=0, NotChecked=0, Total=123552 [2021-12-16 20:34:42,567 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4172 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 1663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4172 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1663 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:42,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4172 Valid, 171 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1663 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 20:34:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-12-16 20:34:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 706. [2021-12-16 20:34:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 1.3574468085106384) internal successors, (957), 705 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 957 transitions. [2021-12-16 20:34:42,684 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 957 transitions. Word has length 176 [2021-12-16 20:34:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:42,685 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 957 transitions. [2021-12-16 20:34:42,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 957 transitions. [2021-12-16 20:34:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2021-12-16 20:34:42,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:42,692 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 143, 50, 50, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:42,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:42,906 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,SelfDestructingSolverStorable9 [2021-12-16 20:34:42,907 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -658164028, now seen corresponding path program 7 times [2021-12-16 20:34:42,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395789547] [2021-12-16 20:34:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:42,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2021-12-16 20:34:43,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395789547] [2021-12-16 20:34:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395789547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777186276] [2021-12-16 20:34:43,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 20:34:43,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:43,827 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) [2021-12-16 20:34:43,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 20:34:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:44,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 20:34:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2021-12-16 20:34:45,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2021-12-16 20:34:47,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777186276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:47,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:47,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2021-12-16 20:34:47,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61555429] [2021-12-16 20:34:47,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:47,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-16 20:34:47,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:47,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-16 20:34:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-16 20:34:47,834 INFO L87 Difference]: Start difference. First operand 706 states and 957 transitions. Second operand has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:57,886 INFO L93 Difference]: Finished difference Result 44922 states and 63580 transitions. [2021-12-16 20:34:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-16 20:34:57,887 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 683 [2021-12-16 20:34:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:58,091 INFO L225 Difference]: With dead ends: 44922 [2021-12-16 20:34:58,091 INFO L226 Difference]: Without dead ends: 44319 [2021-12-16 20:34:58,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1314 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-16 20:34:58,106 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5221 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5221 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:58,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5221 Valid, 1005 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 20:34:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44319 states. [2021-12-16 20:34:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44319 to 810. [2021-12-16 20:34:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 1.311495673671199) internal successors, (1061), 809 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1061 transitions. [2021-12-16 20:34:58,511 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1061 transitions. Word has length 683 [2021-12-16 20:34:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:58,512 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1061 transitions. [2021-12-16 20:34:58,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1061 transitions. [2021-12-16 20:34:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2021-12-16 20:34:58,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:58,525 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 143, 102, 102, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:58,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-16 20:34:58,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:58,751 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:58,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1077196708, now seen corresponding path program 8 times [2021-12-16 20:34:58,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:58,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75866054] [2021-12-16 20:34:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:58,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:35:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2021-12-16 20:35:02,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:35:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75866054] [2021-12-16 20:35:02,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75866054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:35:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733721786] [2021-12-16 20:35:02,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 20:35:02,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:35:02,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:35:02,304 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) [2021-12-16 20:35:02,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 20:35:02,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 20:35:02,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:35:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-16 20:35:02,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:35:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2021-12-16 20:35:03,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:35:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2021-12-16 20:35:12,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733721786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:35:12,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:35:12,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 209 [2021-12-16 20:35:12,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708752851] [2021-12-16 20:35:12,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:35:12,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2021-12-16 20:35:12,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:35:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2021-12-16 20:35:12,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2021-12-16 20:35:12,473 INFO L87 Difference]: Start difference. First operand 810 states and 1061 transitions. Second operand has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:36:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:36:25,307 INFO L93 Difference]: Finished difference Result 105970 states and 150056 transitions. [2021-12-16 20:36:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2021-12-16 20:36:25,307 INFO L78 Accepts]: Start accepts. Automaton has has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 787 [2021-12-16 20:36:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:36:25,500 INFO L225 Difference]: With dead ends: 105970 [2021-12-16 20:36:25,500 INFO L226 Difference]: Without dead ends: 105367 [2021-12-16 20:36:25,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1470 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2021-12-16 20:36:25,531 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15076 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15076 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1193 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 20:36:25,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15076 Valid, 2474 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1193 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 20:36:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105367 states. [2021-12-16 20:36:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105367 to 1018. [2021-12-16 20:36:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.247787610619469) internal successors, (1269), 1017 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:36:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1269 transitions. [2021-12-16 20:36:26,481 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1269 transitions. Word has length 787 [2021-12-16 20:36:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:36:26,481 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1269 transitions. [2021-12-16 20:36:26,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:36:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1269 transitions. [2021-12-16 20:36:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2021-12-16 20:36:26,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:36:26,487 INFO L514 BasicCegarLoop]: trace histogram [206, 206, 143, 143, 143, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:36:26,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-16 20:36:26,698 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,SelfDestructingSolverStorable11 [2021-12-16 20:36:26,698 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:36:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:36:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash 994231180, now seen corresponding path program 9 times [2021-12-16 20:36:26,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:36:26,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504757184] [2021-12-16 20:36:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:36:26,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:36:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:36:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 0 proven. 42436 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2021-12-16 20:36:40,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:36:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504757184] [2021-12-16 20:36:40,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504757184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:36:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049711022] [2021-12-16 20:36:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 20:36:40,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:36:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:36:40,043 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) [2021-12-16 20:36:40,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 20:36:40,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-16 20:36:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:36:40,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 20:36:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:36:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 3027 proven. 51 refuted. 0 times theorem prover too weak. 80113 trivial. 0 not checked. [2021-12-16 20:36:42,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:36:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 3027 proven. 51 refuted. 0 times theorem prover too weak. 80113 trivial. 0 not checked. [2021-12-16 20:36:43,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049711022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:36:43,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:36:43,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [209, 12, 12] total 228 [2021-12-16 20:36:43,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960049749] [2021-12-16 20:36:43,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:36:43,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2021-12-16 20:36:43,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:36:43,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2021-12-16 20:36:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23753, Invalid=28003, Unknown=0, NotChecked=0, Total=51756 [2021-12-16 20:36:43,996 INFO L87 Difference]: Start difference. First operand 1018 states and 1269 transitions. Second operand has 228 states, 228 states have (on average 2.1228070175438596) internal successors, (484), 228 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15