./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_09.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_two_index_09.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 c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:27:31,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:27:31,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:27:31,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:27:31,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:27:31,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:27:31,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:27:31,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:27:31,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:27:31,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:27:31,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:27:31,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:27:31,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:27:31,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:27:31,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:27:31,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:27:31,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:27:31,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:27:31,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:27:31,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:27:31,489 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:27:31,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:27:31,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:27:31,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:27:31,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:27:31,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:27:31,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:27:31,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:27:31,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:27:31,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:27:31,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:27:31,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:27:31,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:27:31,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:27:31,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:27:31,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:27:31,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:27:31,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:27:31,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:27:31,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:27:31,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:27:31,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:27:31,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:27:31,534 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:27:31,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:27:31,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:27:31,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:27:31,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:27:31,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:27:31,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:27:31,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:27:31,537 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:27:31,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:27:31,537 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:27:31,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:27:31,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:27:31,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:27:31,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:27:31,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:27:31,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:27:31,538 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:27:31,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:27:31,539 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:27:31,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:27:31,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:27:31,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:27:31,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:27:31,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:27:31,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:27:31,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:27:31,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:27:31,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:27:31,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:27:31,541 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:27:31,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:27:31,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:27:31,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 [2022-07-22 09:27:31,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:27:31,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:27:31,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:27:31,773 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:27:31,774 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:27:31,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-07-22 09:27:31,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06204cbcc/39a3c73041114553b136b1b93d3529ba/FLAG45593da7e [2022-07-22 09:27:32,215 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:27:32,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-07-22 09:27:32,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06204cbcc/39a3c73041114553b136b1b93d3529ba/FLAG45593da7e [2022-07-22 09:27:32,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06204cbcc/39a3c73041114553b136b1b93d3529ba [2022-07-22 09:27:32,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:27:32,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:27:32,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:27:32,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:27:32,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:27:32,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a424af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32, skipping insertion in model container [2022-07-22 09:27:32,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:27:32,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:27:32,802 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_two_index_09.i[814,827] [2022-07-22 09:27:32,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:27:32,856 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:27:32,864 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_two_index_09.i[814,827] [2022-07-22 09:27:32,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:27:32,892 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:27:32,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32 WrapperNode [2022-07-22 09:27:32,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:27:32,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:27:32,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:27:32,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:27:32,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,922 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-22 09:27:32,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:27:32,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:27:32,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:27:32,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:27:32,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:27:32,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:27:32,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:27:32,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:27:32,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (1/1) ... [2022-07-22 09:27:32,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:27:32,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:27:32,975 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) [2022-07-22 09:27:32,980 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 [2022-07-22 09:27:33,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:27:33,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:27:33,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:27:33,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:27:33,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:27:33,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:27:33,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:27:33,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:27:33,041 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:27:33,042 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:27:33,117 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:27:33,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:27:33,121 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 09:27:33,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:27:33 BoogieIcfgContainer [2022-07-22 09:27:33,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:27:33,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:27:33,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:27:33,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:27:33,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:27:32" (1/3) ... [2022-07-22 09:27:33,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebf00a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:27:33, skipping insertion in model container [2022-07-22 09:27:33,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:27:32" (2/3) ... [2022-07-22 09:27:33,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebf00a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:27:33, skipping insertion in model container [2022-07-22 09:27:33,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:27:33" (3/3) ... [2022-07-22 09:27:33,128 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2022-07-22 09:27:33,136 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:27:33,137 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:27:33,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:27:33,174 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@21f75d4d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@60331585 [2022-07-22 09:27:33,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:27:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) [2022-07-22 09:27:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 09:27:33,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:27:33,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:27:33,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:27:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:27:33,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2022-07-22 09:27:33,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:27:33,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964844079] [2022-07-22 09:27:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:33,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:27:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:27:33,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:27:33,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964844079] [2022-07-22 09:27:33,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964844079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:27:33,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:27:33,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:27:33,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110434686] [2022-07-22 09:27:33,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:27:33,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:27:33,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:27:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:27:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:27:33,411 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:27:33,454 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2022-07-22 09:27:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:27:33,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-22 09:27:33,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:27:33,468 INFO L225 Difference]: With dead ends: 28 [2022-07-22 09:27:33,482 INFO L226 Difference]: Without dead ends: 12 [2022-07-22 09:27:33,484 INFO L412 NwaCegarLoop]: 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 [2022-07-22 09:27:33,486 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 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 [2022-07-22 09:27:33,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:27:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-22 09:27:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-22 09:27:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-22 09:27:33,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-07-22 09:27:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:27:33,509 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-22 09:27:33,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-22 09:27:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 09:27:33,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:27:33,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:27:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:27:33,512 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:27:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:27:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2022-07-22 09:27:33,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:27:33,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105357848] [2022-07-22 09:27:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:27:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:27:33,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:27:33,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105357848] [2022-07-22 09:27:33,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105357848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:27:33,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357508381] [2022-07-22 09:27:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:33,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:33,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:27:33,586 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) [2022-07-22 09:27:33,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:27:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:33,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:27:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:27:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:27:33,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:27:33,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357508381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:27:33,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:27:33,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-22 09:27:33,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026210391] [2022-07-22 09:27:33,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:27:33,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:27:33,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:27:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:27:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:27:33,682 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. 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) [2022-07-22 09:27:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:27:33,695 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-07-22 09:27:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:27:33,696 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 [2022-07-22 09:27:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:27:33,696 INFO L225 Difference]: With dead ends: 24 [2022-07-22 09:27:33,697 INFO L226 Difference]: Without dead ends: 18 [2022-07-22 09:27:33,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:27:33,698 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:27:33,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:27:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-22 09:27:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-07-22 09:27:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2022-07-22 09:27:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-22 09:27:33,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-07-22 09:27:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:27:33,701 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-22 09:27:33,701 INFO L496 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) [2022-07-22 09:27:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-22 09:27:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 09:27:33,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:27:33,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:27:33,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:27:33,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:33,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:27:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:27:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2022-07-22 09:27:33,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:27:33,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759393731] [2022-07-22 09:27:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:33,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:27:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:27:33,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:27:33,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759393731] [2022-07-22 09:27:33,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759393731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:27:33,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606402958] [2022-07-22 09:27:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:33,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:33,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:27:33,950 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) [2022-07-22 09:27:33,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:27:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:34,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:27:34,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:27:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:27:34,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:27:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:27:34,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606402958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:27:34,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:27:34,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 09:27:34,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259021111] [2022-07-22 09:27:34,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:27:34,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:27:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:27:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:27:34,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:27:34,045 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:27:34,072 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-07-22 09:27:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 09:27:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 11 [2022-07-22 09:27:34,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:27:34,073 INFO L225 Difference]: With dead ends: 36 [2022-07-22 09:27:34,073 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 09:27:34,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:27:34,074 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:27:34,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:27:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 09:27:34,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-07-22 09:27:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-22 09:27:34,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-07-22 09:27:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:27:34,078 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-22 09:27:34,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-22 09:27:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 09:27:34,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:27:34,079 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:27:34,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:27:34,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 09:27:34,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:27:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:27:34,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2022-07-22 09:27:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:27:34,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239871524] [2022-07-22 09:27:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:27:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 09:27:34,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:27:34,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239871524] [2022-07-22 09:27:34,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239871524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:27:34,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485425881] [2022-07-22 09:27:34,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:27:34,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:34,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:27:34,411 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) [2022-07-22 09:27:34,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:27:34,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:27:34,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:27:34,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:27:34,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:27:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:27:34,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:27:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:27:34,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485425881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:27:34,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:27:34,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-22 09:27:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989372277] [2022-07-22 09:27:34,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:27:34,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 09:27:34,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:27:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 09:27:34,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-07-22 09:27:34,560 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:27:34,615 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-07-22 09:27:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 09:27:34,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2022-07-22 09:27:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:27:34,616 INFO L225 Difference]: With dead ends: 57 [2022-07-22 09:27:34,616 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 09:27:34,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-07-22 09:27:34,618 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:27:34,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:27:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 09:27:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2022-07-22 09:27:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-07-22 09:27:34,622 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2022-07-22 09:27:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:27:34,622 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-07-22 09:27:34,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-07-22 09:27:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 09:27:34,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:27:34,623 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:27:34,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:27:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:34,840 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:27:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:27:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1448090520, now seen corresponding path program 3 times [2022-07-22 09:27:34,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:27:34,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627127728] [2022-07-22 09:27:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:34,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:27:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 09:27:34,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:27:34,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627127728] [2022-07-22 09:27:34,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627127728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:27:34,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28869251] [2022-07-22 09:27:34,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:27:34,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:34,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:27:34,923 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) [2022-07-22 09:27:34,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:27:34,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:27:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:27:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:27:34,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:27:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 09:27:35,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:27:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 09:27:35,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28869251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:27:35,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:27:35,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-22 09:27:35,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826271514] [2022-07-22 09:27:35,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:27:35,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:27:35,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:27:35,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:27:35,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:27:35,067 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2022-07-22 09:27:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:27:35,130 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-07-22 09:27:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 09:27:35,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 25 [2022-07-22 09:27:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:27:35,132 INFO L225 Difference]: With dead ends: 85 [2022-07-22 09:27:35,132 INFO L226 Difference]: Without dead ends: 79 [2022-07-22 09:27:35,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:27:35,133 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:27:35,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:27:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-22 09:27:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2022-07-22 09:27:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 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) [2022-07-22 09:27:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-22 09:27:35,151 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2022-07-22 09:27:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:27:35,151 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-22 09:27:35,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2022-07-22 09:27:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-22 09:27:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 09:27:35,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:27:35,152 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:27:35,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:27:35,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:35,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:27:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:27:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash -798905000, now seen corresponding path program 4 times [2022-07-22 09:27:35,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:27:35,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224303488] [2022-07-22 09:27:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:35,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:27:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 09:27:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:27:35,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224303488] [2022-07-22 09:27:35,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224303488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:27:35,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453972208] [2022-07-22 09:27:35,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:27:35,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:35,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:27:35,526 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) [2022-07-22 09:27:35,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:27:35,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:27:35,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:27:35,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 09:27:35,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:27:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-22 09:27:35,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:27:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-22 09:27:35,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453972208] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:27:35,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:27:35,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2022-07-22 09:27:35,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730638256] [2022-07-22 09:27:35,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:27:35,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 09:27:35,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:27:35,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 09:27:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:27:35,931 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:27:36,081 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2022-07-22 09:27:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 09:27:36,082 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 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 31 [2022-07-22 09:27:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:27:36,083 INFO L225 Difference]: With dead ends: 142 [2022-07-22 09:27:36,083 INFO L226 Difference]: Without dead ends: 124 [2022-07-22 09:27:36,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:27:36,084 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:27:36,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 72 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:27:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-22 09:27:36,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 59. [2022-07-22 09:27:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 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) [2022-07-22 09:27:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-07-22 09:27:36,090 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2022-07-22 09:27:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:27:36,090 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-07-22 09:27:36,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:27:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-07-22 09:27:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 09:27:36,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:27:36,092 INFO L195 NwaCegarLoop]: trace histogram [35, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:27:36,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:27:36,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:36,304 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:27:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:27:36,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1918403063, now seen corresponding path program 5 times [2022-07-22 09:27:36,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:27:36,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442718520] [2022-07-22 09:27:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:27:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:27:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:27:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-07-22 09:27:36,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:27:36,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442718520] [2022-07-22 09:27:36,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442718520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:27:36,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393730252] [2022-07-22 09:27:36,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:27:36,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:27:36,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:27:36,508 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) [2022-07-22 09:27:36,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:31:35,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-07-22 09:31:35,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:31:35,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:31:35,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:31:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-22 09:31:35,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:31:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-22 09:31:36,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393730252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:31:36,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:31:36,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 38, 38] total 85 [2022-07-22 09:31:36,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646880649] [2022-07-22 09:31:36,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:31:36,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-22 09:31:36,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:31:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-22 09:31:36,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3569, Invalid=3571, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 09:31:36,436 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 85 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:31:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:31:36,742 INFO L93 Difference]: Finished difference Result 222 states and 277 transitions. [2022-07-22 09:31:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-22 09:31:36,743 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 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 57 [2022-07-22 09:31:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:31:36,746 INFO L225 Difference]: With dead ends: 222 [2022-07-22 09:31:36,747 INFO L226 Difference]: Without dead ends: 201 [2022-07-22 09:31:36,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3891 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3569, Invalid=3571, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 09:31:36,749 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 423 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:31:36,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 106 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:31:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-22 09:31:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 111. [2022-07-22 09:31:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:31:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-07-22 09:31:36,774 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 57 [2022-07-22 09:31:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:31:36,774 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-07-22 09:31:36,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:31:36,774 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-07-22 09:31:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-22 09:31:36,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:31:36,781 INFO L195 NwaCegarLoop]: trace histogram [82, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:31:36,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 09:31:36,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:36,991 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:31:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:31:36,992 INFO L85 PathProgramCache]: Analyzing trace with hash 25556088, now seen corresponding path program 6 times [2022-07-22 09:31:36,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:31:36,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098610668] [2022-07-22 09:31:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:31:36,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:31:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:31:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3574 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2022-07-22 09:31:37,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:31:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098610668] [2022-07-22 09:31:37,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098610668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:31:37,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249812338] [2022-07-22 09:31:37,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:31:37,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:31:37,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:31:37,294 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) [2022-07-22 09:31:37,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process