./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more/buffer-mult.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more/buffer-mult.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 87146ba094638754dcf92e96dddd0995c2257c70 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 12:24:52,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 12:24:52,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 12:24:52,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 12:24:52,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 12:24:52,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 12:24:52,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 12:24:52,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 12:24:52,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 12:24:52,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 12:24:52,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 12:24:52,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 12:24:52,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 12:24:52,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 12:24:52,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 12:24:52,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 12:24:52,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 12:24:52,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 12:24:52,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 12:24:52,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 12:24:52,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 12:24:52,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 12:24:52,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 12:24:52,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 12:24:52,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 12:24:52,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 12:24:52,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 12:24:52,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 12:24:52,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 12:24:52,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 12:24:52,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 12:24:52,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 12:24:52,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 12:24:52,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 12:24:52,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 12:24:52,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 12:24:52,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 12:24:52,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 12:24:52,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 12:24:52,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 12:24:52,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 12:24:52,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 12:24:53,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 12:24:53,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 12:24:53,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 12:24:53,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 12:24:53,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 12:24:53,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 12:24:53,020 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 12:24:53,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 12:24:53,020 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 12:24:53,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 12:24:53,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 12:24:53,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 12:24:53,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 12:24:53,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 12:24:53,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 12:24:53,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 12:24:53,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 12:24:53,023 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 12:24:53,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 12:24:53,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 12:24:53,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 12:24:53,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 12:24:53,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:24:53,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 12:24:53,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 12:24:53,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 12:24:53,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 12:24:53,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 12:24:53,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 12:24:53,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 12:24:53,027 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87146ba094638754dcf92e96dddd0995c2257c70 [2021-10-03 12:24:53,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 12:24:53,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 12:24:53,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 12:24:53,470 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 12:24:53,471 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 12:24:53,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more/buffer-mult.wvr.c [2021-10-03 12:24:53,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6fedd4ae/5126f46e600944d18c858f1c089c56ad/FLAGa56c7839b [2021-10-03 12:24:54,145 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 12:24:54,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/buffer-mult.wvr.c [2021-10-03 12:24:54,146 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:24:54,146 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:24:54,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6fedd4ae/5126f46e600944d18c858f1c089c56ad/FLAGa56c7839b [2021-10-03 12:24:54,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6fedd4ae/5126f46e600944d18c858f1c089c56ad [2021-10-03 12:24:54,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 12:24:54,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 12:24:54,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 12:24:54,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 12:24:54,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 12:24:54,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d3dc9f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54, skipping insertion in model container [2021-10-03 12:24:54,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 12:24:54,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 12:24:54,669 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:24:54,707 WARN L612 FunctionHandler]: implicit declaration of function assume [2021-10-03 12:24:54,725 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/buffer-mult.wvr.c[2284,2297] [2021-10-03 12:24:54,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:24:54,747 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 12:24:54,760 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:24:54,768 WARN L612 FunctionHandler]: implicit declaration of function assume [2021-10-03 12:24:54,778 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/buffer-mult.wvr.c[2284,2297] [2021-10-03 12:24:54,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:24:54,800 INFO L208 MainTranslator]: Completed translation [2021-10-03 12:24:54,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54 WrapperNode [2021-10-03 12:24:54,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 12:24:54,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 12:24:54,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 12:24:54,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 12:24:54,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 12:24:54,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 12:24:54,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 12:24:54,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 12:24:54,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 12:24:54,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 12:24:54,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 12:24:54,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 12:24:54,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (1/1) ... [2021-10-03 12:24:54,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:24:54,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:24:54,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-03 12:24:54,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-03 12:24:55,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 12:24:55,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 12:24:55,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 12:24:55,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 12:24:55,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-03 12:24:55,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-03 12:24:55,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-03 12:24:55,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-03 12:24:55,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 12:24:55,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 12:24:55,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-03 12:24:55,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-03 12:24:55,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-03 12:24:55,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 12:24:55,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 12:24:55,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 12:24:55,034 INFO L130 BoogieDeclarations]: Found specification of procedure assume [2021-10-03 12:24:55,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 12:24:55,037 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 12:24:55,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 12:24:55,960 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2021-10-03 12:24:55,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:24:55 BoogieIcfgContainer [2021-10-03 12:24:55,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 12:24:55,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 12:24:55,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 12:24:55,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 12:24:55,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 12:24:54" (1/3) ... [2021-10-03 12:24:55,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aed3da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:24:55, skipping insertion in model container [2021-10-03 12:24:55,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:24:54" (2/3) ... [2021-10-03 12:24:55,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aed3da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:24:55, skipping insertion in model container [2021-10-03 12:24:55,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:24:55" (3/3) ... [2021-10-03 12:24:55,978 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult.wvr.c [2021-10-03 12:24:55,985 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 12:24:55,986 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 12:24:55,986 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 12:24:55,986 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 12:24:56,048 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,049 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,050 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,050 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,051 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,051 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,051 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,051 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,051 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,052 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,053 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,053 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,054 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,054 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,054 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,055 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,055 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,055 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,056 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,056 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,056 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,057 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,057 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,057 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,057 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,057 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,067 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,067 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,068 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,068 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,068 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,068 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,084 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,086 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,087 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,088 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,088 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,089 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,091 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,091 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,091 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,091 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,094 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,094 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,095 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,095 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,095 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,096 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:24:56,113 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-03 12:24:56,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 12:24:56,171 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-03 12:24:56,171 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-03 12:24:56,190 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 12:24:56,203 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 180 transitions, 392 flow [2021-10-03 12:24:56,207 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 180 transitions, 392 flow [2021-10-03 12:24:56,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 177 places, 180 transitions, 392 flow [2021-10-03 12:24:56,287 INFO L129 PetriNetUnfolder]: 16/176 cut-off events. [2021-10-03 12:24:56,287 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-03 12:24:56,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 176 events. 16/176 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2021-10-03 12:24:56,297 INFO L116 LiptonReduction]: Number of co-enabled transitions 1100 [2021-10-03 12:25:04,339 INFO L131 LiptonReduction]: Checked pairs total: 3106 [2021-10-03 12:25:04,339 INFO L133 LiptonReduction]: Total number of compositions: 167 [2021-10-03 12:25:04,349 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 38 transitions, 108 flow [2021-10-03 12:25:04,390 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 324 states, 323 states have (on average 4.027863777089784) internal successors, (1301), 323 states have internal predecessors, (1301), 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) [2021-10-03 12:25:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 324 states, 323 states have (on average 4.027863777089784) internal successors, (1301), 323 states have internal predecessors, (1301), 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) [2021-10-03 12:25:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:25:04,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:04,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:04,414 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:04,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1318146205, now seen corresponding path program 1 times [2021-10-03 12:25:04,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:04,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688490389] [2021-10-03 12:25:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:04,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:04,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:04,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688490389] [2021-10-03 12:25:04,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688490389] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:25:04,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:25:04,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-03 12:25:04,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519392830] [2021-10-03 12:25:04,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:04,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:04,991 INFO L87 Difference]: Start difference. First operand has 324 states, 323 states have (on average 4.027863777089784) internal successors, (1301), 323 states have internal predecessors, (1301), 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 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:05,128 INFO L93 Difference]: Finished difference Result 941 states and 3828 transitions. [2021-10-03 12:25:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:25:05,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:25:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:05,160 INFO L225 Difference]: With dead ends: 941 [2021-10-03 12:25:05,161 INFO L226 Difference]: Without dead ends: 883 [2021-10-03 12:25:05,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:25:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-10-03 12:25:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 440. [2021-10-03 12:25:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 4.0592255125284735) internal successors, (1782), 439 states have internal predecessors, (1782), 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) [2021-10-03 12:25:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1782 transitions. [2021-10-03 12:25:05,289 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1782 transitions. Word has length 23 [2021-10-03 12:25:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:05,291 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1782 transitions. [2021-10-03 12:25:05,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1782 transitions. [2021-10-03 12:25:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:25:05,319 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:05,319 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:05,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 12:25:05,320 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash 407141281, now seen corresponding path program 1 times [2021-10-03 12:25:05,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:05,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287570898] [2021-10-03 12:25:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:05,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:05,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:05,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287570898] [2021-10-03 12:25:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287570898] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:25:05,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:25:05,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:25:05,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23195005] [2021-10-03 12:25:05,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:05,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:05,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:05,413 INFO L87 Difference]: Start difference. First operand 440 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:05,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:05,467 INFO L93 Difference]: Finished difference Result 652 states and 2628 transitions. [2021-10-03 12:25:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:25:05,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:25:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:05,475 INFO L225 Difference]: With dead ends: 652 [2021-10-03 12:25:05,475 INFO L226 Difference]: Without dead ends: 638 [2021-10-03 12:25:05,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-10-03 12:25:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2021-10-03 12:25:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 4.058084772370487) internal successors, (2585), 637 states have internal predecessors, (2585), 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) [2021-10-03 12:25:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 2585 transitions. [2021-10-03 12:25:05,516 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 2585 transitions. Word has length 25 [2021-10-03 12:25:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:05,517 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 2585 transitions. [2021-10-03 12:25:05,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 2585 transitions. [2021-10-03 12:25:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:25:05,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:05,521 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:05,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-03 12:25:05,522 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:05,523 INFO L82 PathProgramCache]: Analyzing trace with hash 915933893, now seen corresponding path program 1 times [2021-10-03 12:25:05,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:05,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778633475] [2021-10-03 12:25:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:05,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:05,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:05,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778633475] [2021-10-03 12:25:05,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778633475] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:25:05,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:25:05,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:25:05,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778468186] [2021-10-03 12:25:05,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:05,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:05,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:05,593 INFO L87 Difference]: Start difference. First operand 638 states and 2585 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:05,647 INFO L93 Difference]: Finished difference Result 962 states and 3789 transitions. [2021-10-03 12:25:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:25:05,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:25:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:05,658 INFO L225 Difference]: With dead ends: 962 [2021-10-03 12:25:05,659 INFO L226 Difference]: Without dead ends: 886 [2021-10-03 12:25:05,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-10-03 12:25:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2021-10-03 12:25:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 4.020338983050848) internal successors, (3558), 885 states have internal predecessors, (3558), 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) [2021-10-03 12:25:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3558 transitions. [2021-10-03 12:25:05,710 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3558 transitions. Word has length 25 [2021-10-03 12:25:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:05,710 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 3558 transitions. [2021-10-03 12:25:05,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3558 transitions. [2021-10-03 12:25:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:25:05,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:05,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:05,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-03 12:25:05,717 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:05,718 INFO L82 PathProgramCache]: Analyzing trace with hash -104961715, now seen corresponding path program 2 times [2021-10-03 12:25:05,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:05,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467315689] [2021-10-03 12:25:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:05,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:05,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:05,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467315689] [2021-10-03 12:25:05,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467315689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:05,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536333080] [2021-10-03 12:25:05,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:25:05,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:05,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:05,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:05,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-03 12:25:05,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:25:05,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:25:05,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-03 12:25:05,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:06,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536333080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:06,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:06,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-03 12:25:06,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993792561] [2021-10-03 12:25:06,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:06,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:06,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:06,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:06,078 INFO L87 Difference]: Start difference. First operand 886 states and 3558 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:06,139 INFO L93 Difference]: Finished difference Result 770 states and 3068 transitions. [2021-10-03 12:25:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:25:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:25:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:06,148 INFO L225 Difference]: With dead ends: 770 [2021-10-03 12:25:06,148 INFO L226 Difference]: Without dead ends: 770 [2021-10-03 12:25:06,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:25:06,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-10-03 12:25:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2021-10-03 12:25:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.9895968790637193) internal successors, (3068), 769 states have internal predecessors, (3068), 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) [2021-10-03 12:25:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 3068 transitions. [2021-10-03 12:25:06,190 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 3068 transitions. Word has length 25 [2021-10-03 12:25:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:06,191 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 3068 transitions. [2021-10-03 12:25:06,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 3068 transitions. [2021-10-03 12:25:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-03 12:25:06,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:06,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:06,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:06,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:06,410 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:06,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1823263596, now seen corresponding path program 1 times [2021-10-03 12:25:06,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:06,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286468716] [2021-10-03 12:25:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:06,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:25:06,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:06,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286468716] [2021-10-03 12:25:06,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286468716] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:06,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861680472] [2021-10-03 12:25:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:06,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:06,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:06,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:06,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-03 12:25:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-03 12:25:06,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:25:06,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861680472] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:25:06,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 12:25:06,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-03 12:25:06,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906612867] [2021-10-03 12:25:06,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:06,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:25:06,678 INFO L87 Difference]: Start difference. First operand 770 states and 3068 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-10-03 12:25:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:06,744 INFO L93 Difference]: Finished difference Result 1427 states and 5200 transitions. [2021-10-03 12:25:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:25:06,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-10-03 12:25:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:06,759 INFO L225 Difference]: With dead ends: 1427 [2021-10-03 12:25:06,760 INFO L226 Difference]: Without dead ends: 1267 [2021-10-03 12:25:06,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:25:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-10-03 12:25:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 819. [2021-10-03 12:25:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.9792176039119806) internal successors, (3255), 818 states have internal predecessors, (3255), 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) [2021-10-03 12:25:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 3255 transitions. [2021-10-03 12:25:06,821 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 3255 transitions. Word has length 27 [2021-10-03 12:25:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:06,821 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 3255 transitions. [2021-10-03 12:25:06,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-10-03 12:25:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 3255 transitions. [2021-10-03 12:25:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-03 12:25:06,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:06,827 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:06,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:07,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:07,041 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:07,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1134035544, now seen corresponding path program 1 times [2021-10-03 12:25:07,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:07,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260806852] [2021-10-03 12:25:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:07,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:25:07,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:07,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260806852] [2021-10-03 12:25:07,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260806852] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:25:07,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:25:07,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:25:07,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862346029] [2021-10-03 12:25:07,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:07,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:07,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:07,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:07,096 INFO L87 Difference]: Start difference. First operand 819 states and 3255 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-10-03 12:25:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:07,170 INFO L93 Difference]: Finished difference Result 1043 states and 3941 transitions. [2021-10-03 12:25:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:25:07,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-10-03 12:25:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:07,182 INFO L225 Difference]: With dead ends: 1043 [2021-10-03 12:25:07,182 INFO L226 Difference]: Without dead ends: 1013 [2021-10-03 12:25:07,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:25:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-10-03 12:25:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 849. [2021-10-03 12:25:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.902122641509434) internal successors, (3309), 848 states have internal predecessors, (3309), 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) [2021-10-03 12:25:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 3309 transitions. [2021-10-03 12:25:07,232 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 3309 transitions. Word has length 27 [2021-10-03 12:25:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:07,233 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 3309 transitions. [2021-10-03 12:25:07,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-10-03 12:25:07,233 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 3309 transitions. [2021-10-03 12:25:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-03 12:25:07,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:07,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:07,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-03 12:25:07,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:07,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:07,240 INFO L82 PathProgramCache]: Analyzing trace with hash -735283030, now seen corresponding path program 2 times [2021-10-03 12:25:07,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:07,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141409885] [2021-10-03 12:25:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:07,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:25:07,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:07,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141409885] [2021-10-03 12:25:07,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141409885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:07,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589287671] [2021-10-03 12:25:07,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:25:07,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:07,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:07,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:07,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-03 12:25:07,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:25:07,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:25:07,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-03 12:25:07,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:25:07,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589287671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:07,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:07,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-03 12:25:07,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448893321] [2021-10-03 12:25:07,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 12:25:07,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 12:25:07,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:25:07,533 INFO L87 Difference]: Start difference. First operand 849 states and 3309 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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) [2021-10-03 12:25:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:07,642 INFO L93 Difference]: Finished difference Result 917 states and 3496 transitions. [2021-10-03 12:25:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:25:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 27 [2021-10-03 12:25:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:07,653 INFO L225 Difference]: With dead ends: 917 [2021-10-03 12:25:07,653 INFO L226 Difference]: Without dead ends: 869 [2021-10-03 12:25:07,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:25:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-10-03 12:25:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 669. [2021-10-03 12:25:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.941616766467066) internal successors, (2633), 668 states have internal predecessors, (2633), 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) [2021-10-03 12:25:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2633 transitions. [2021-10-03 12:25:07,690 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2633 transitions. Word has length 27 [2021-10-03 12:25:07,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:07,690 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2633 transitions. [2021-10-03 12:25:07,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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) [2021-10-03 12:25:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2633 transitions. [2021-10-03 12:25:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-03 12:25:07,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:07,694 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:07,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:07,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:07,909 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:07,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1539468899, now seen corresponding path program 1 times [2021-10-03 12:25:07,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:07,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676041241] [2021-10-03 12:25:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:07,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:25:07,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:07,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676041241] [2021-10-03 12:25:07,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676041241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:07,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65831662] [2021-10-03 12:25:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:07,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:07,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:07,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:07,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-03 12:25:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-03 12:25:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:25:08,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65831662] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:08,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:08,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-03 12:25:08,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305719261] [2021-10-03 12:25:08,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 12:25:08,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 12:25:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:25:08,218 INFO L87 Difference]: Start difference. First operand 669 states and 2633 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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) [2021-10-03 12:25:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:08,316 INFO L93 Difference]: Finished difference Result 879 states and 3170 transitions. [2021-10-03 12:25:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:25:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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 28 [2021-10-03 12:25:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:08,325 INFO L225 Difference]: With dead ends: 879 [2021-10-03 12:25:08,325 INFO L226 Difference]: Without dead ends: 781 [2021-10-03 12:25:08,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:25:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-10-03 12:25:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 571. [2021-10-03 12:25:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.836842105263158) internal successors, (2187), 570 states have internal predecessors, (2187), 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) [2021-10-03 12:25:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 2187 transitions. [2021-10-03 12:25:08,365 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 2187 transitions. Word has length 28 [2021-10-03 12:25:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:08,366 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 2187 transitions. [2021-10-03 12:25:08,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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) [2021-10-03 12:25:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 2187 transitions. [2021-10-03 12:25:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-03 12:25:08,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:08,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:08,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:08,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:08,585 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:08,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1477558467, now seen corresponding path program 2 times [2021-10-03 12:25:08,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:08,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779864875] [2021-10-03 12:25:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:08,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:25:08,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:08,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779864875] [2021-10-03 12:25:08,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779864875] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:25:08,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:25:08,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:25:08,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279089633] [2021-10-03 12:25:08,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:08,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:08,641 INFO L87 Difference]: Start difference. First operand 571 states and 2187 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-03 12:25:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:08,708 INFO L93 Difference]: Finished difference Result 621 states and 2329 transitions. [2021-10-03 12:25:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:25:08,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2021-10-03 12:25:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:08,715 INFO L225 Difference]: With dead ends: 621 [2021-10-03 12:25:08,715 INFO L226 Difference]: Without dead ends: 595 [2021-10-03 12:25:08,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:25:08,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-10-03 12:25:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 551. [2021-10-03 12:25:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 3.86) internal successors, (2123), 550 states have internal predecessors, (2123), 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) [2021-10-03 12:25:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 2123 transitions. [2021-10-03 12:25:08,741 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 2123 transitions. Word has length 28 [2021-10-03 12:25:08,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:08,741 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 2123 transitions. [2021-10-03 12:25:08,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-03 12:25:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 2123 transitions. [2021-10-03 12:25:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-03 12:25:08,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:08,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:08,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-03 12:25:08,745 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash -102713146, now seen corresponding path program 1 times [2021-10-03 12:25:08,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:08,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727191365] [2021-10-03 12:25:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:08,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:25:08,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:08,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727191365] [2021-10-03 12:25:08,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727191365] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:25:08,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:25:08,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-03 12:25:08,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278935117] [2021-10-03 12:25:08,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:08,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:08,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:08,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:08,798 INFO L87 Difference]: Start difference. First operand 551 states and 2123 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:08,829 INFO L93 Difference]: Finished difference Result 669 states and 2448 transitions. [2021-10-03 12:25:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:25:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-03 12:25:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:08,835 INFO L225 Difference]: With dead ends: 669 [2021-10-03 12:25:08,835 INFO L226 Difference]: Without dead ends: 552 [2021-10-03 12:25:08,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:25:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-10-03 12:25:08,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-10-03 12:25:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 3.85480943738657) internal successors, (2124), 551 states have internal predecessors, (2124), 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) [2021-10-03 12:25:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 2124 transitions. [2021-10-03 12:25:08,860 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 2124 transitions. Word has length 30 [2021-10-03 12:25:08,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:08,861 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 2124 transitions. [2021-10-03 12:25:08,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 2124 transitions. [2021-10-03 12:25:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-03 12:25:08,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:08,864 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:08,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-03 12:25:08,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1993514678, now seen corresponding path program 1 times [2021-10-03 12:25:08,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:08,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617169885] [2021-10-03 12:25:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:08,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:25:08,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:08,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617169885] [2021-10-03 12:25:08,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617169885] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:25:08,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:25:08,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:25:08,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71989321] [2021-10-03 12:25:08,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:08,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:08,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:08,919 INFO L87 Difference]: Start difference. First operand 552 states and 2124 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:08,943 INFO L93 Difference]: Finished difference Result 702 states and 2756 transitions. [2021-10-03 12:25:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:25:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-03 12:25:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:08,951 INFO L225 Difference]: With dead ends: 702 [2021-10-03 12:25:08,952 INFO L226 Difference]: Without dead ends: 702 [2021-10-03 12:25:08,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-10-03 12:25:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 498. [2021-10-03 12:25:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.875251509054326) internal successors, (1926), 497 states have internal predecessors, (1926), 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) [2021-10-03 12:25:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1926 transitions. [2021-10-03 12:25:08,989 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1926 transitions. Word has length 31 [2021-10-03 12:25:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:08,989 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1926 transitions. [2021-10-03 12:25:08,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1926 transitions. [2021-10-03 12:25:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-03 12:25:08,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:08,992 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:08,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-03 12:25:08,992 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:08,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1484722066, now seen corresponding path program 1 times [2021-10-03 12:25:08,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:08,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048526069] [2021-10-03 12:25:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:08,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:25:09,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:09,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048526069] [2021-10-03 12:25:09,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048526069] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:25:09,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:25:09,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:25:09,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782486065] [2021-10-03 12:25:09,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:25:09,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:25:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:09,048 INFO L87 Difference]: Start difference. First operand 498 states and 1926 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:09,085 INFO L93 Difference]: Finished difference Result 1222 states and 4850 transitions. [2021-10-03 12:25:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:25:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-03 12:25:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:09,100 INFO L225 Difference]: With dead ends: 1222 [2021-10-03 12:25:09,100 INFO L226 Difference]: Without dead ends: 1222 [2021-10-03 12:25:09,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:25:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-10-03 12:25:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 906. [2021-10-03 12:25:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 4.177900552486188) internal successors, (3781), 905 states have internal predecessors, (3781), 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) [2021-10-03 12:25:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3781 transitions. [2021-10-03 12:25:09,152 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3781 transitions. Word has length 31 [2021-10-03 12:25:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:09,153 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 3781 transitions. [2021-10-03 12:25:09,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3781 transitions. [2021-10-03 12:25:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:25:09,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:09,158 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:09,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-03 12:25:09,158 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash 426893036, now seen corresponding path program 1 times [2021-10-03 12:25:09,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:09,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479148559] [2021-10-03 12:25:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:09,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:10,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:10,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479148559] [2021-10-03 12:25:10,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479148559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:10,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473225458] [2021-10-03 12:25:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:10,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:10,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:10,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:10,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-03 12:25:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:11,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-03 12:25:11,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:11,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:11,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:11,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-10-03 12:25:11,737 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:25:11,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-03 12:25:12,200 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:25:12,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:25:12,352 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:25:12,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:25:12,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:25:12,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2021-10-03 12:25:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:25:12,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473225458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:12,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:12,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-10-03 12:25:12,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394851483] [2021-10-03 12:25:12,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:25:12,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:25:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:25:12,763 INFO L87 Difference]: Start difference. First operand 906 states and 3781 transitions. Second operand has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 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) [2021-10-03 12:25:16,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:16,282 INFO L93 Difference]: Finished difference Result 5363 states and 22323 transitions. [2021-10-03 12:25:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:25:16,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 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 33 [2021-10-03 12:25:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:16,329 INFO L225 Difference]: With dead ends: 5363 [2021-10-03 12:25:16,329 INFO L226 Difference]: Without dead ends: 5329 [2021-10-03 12:25:16,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2814.2ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:25:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-10-03 12:25:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 2756. [2021-10-03 12:25:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 4.418148820326679) internal successors, (12172), 2755 states have internal predecessors, (12172), 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) [2021-10-03 12:25:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 12172 transitions. [2021-10-03 12:25:16,500 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 12172 transitions. Word has length 33 [2021-10-03 12:25:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:16,501 INFO L470 AbstractCegarLoop]: Abstraction has 2756 states and 12172 transitions. [2021-10-03 12:25:16,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 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) [2021-10-03 12:25:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 12172 transitions. [2021-10-03 12:25:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:25:16,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:16,514 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:16,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:16,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:16,731 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:16,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:16,732 INFO L82 PathProgramCache]: Analyzing trace with hash 642570796, now seen corresponding path program 2 times [2021-10-03 12:25:16,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:16,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234893401] [2021-10-03 12:25:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:16,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:18,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:18,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234893401] [2021-10-03 12:25:18,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234893401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:18,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288562494] [2021-10-03 12:25:18,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:25:18,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:18,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:18,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:18,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-03 12:25:18,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:25:18,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:25:18,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-03 12:25:18,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:18,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:18,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:18,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:18,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:18,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-10-03 12:25:18,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:25:19,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:25:19,290 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:25:19,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-03 12:25:19,703 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:25:19,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:25:19,849 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:25:19,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:25:20,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:25:20,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-10-03 12:25:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:25:20,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288562494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:20,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:20,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-03 12:25:20,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408756901] [2021-10-03 12:25:20,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:25:20,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:25:20,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:25:20,172 INFO L87 Difference]: Start difference. First operand 2756 states and 12172 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:23,407 INFO L93 Difference]: Finished difference Result 4255 states and 18220 transitions. [2021-10-03 12:25:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:25:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-03 12:25:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:23,433 INFO L225 Difference]: With dead ends: 4255 [2021-10-03 12:25:23,433 INFO L226 Difference]: Without dead ends: 4238 [2021-10-03 12:25:23,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2887.3ms TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-10-03 12:25:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4238 states. [2021-10-03 12:25:23,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4238 to 3016. [2021-10-03 12:25:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 4.407960199004975) internal successors, (13290), 3015 states have internal predecessors, (13290), 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) [2021-10-03 12:25:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 13290 transitions. [2021-10-03 12:25:23,587 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 13290 transitions. Word has length 33 [2021-10-03 12:25:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:23,587 INFO L470 AbstractCegarLoop]: Abstraction has 3016 states and 13290 transitions. [2021-10-03 12:25:23,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:25:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 13290 transitions. [2021-10-03 12:25:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:25:23,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:23,603 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:23,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:23,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-03 12:25:23,818 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:23,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:23,819 INFO L82 PathProgramCache]: Analyzing trace with hash -356697432, now seen corresponding path program 3 times [2021-10-03 12:25:23,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:23,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190293301] [2021-10-03 12:25:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:23,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:25,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:25,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190293301] [2021-10-03 12:25:25,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190293301] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:25,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470481026] [2021-10-03 12:25:25,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:25:25,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:25,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:25,389 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:25,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-03 12:25:25,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:25:25,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:25:25,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-03 12:25:25,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:25,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:25,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:25,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:25,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:25,774 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-03 12:25:25,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-10-03 12:25:25,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:25:26,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:26,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:26,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:26,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:26,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:26,257 INFO L354 Elim1Store]: treesize reduction 60, result has 42.9 percent of original size [2021-10-03 12:25:26,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 52 treesize of output 82 [2021-10-03 12:25:26,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:25:26,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:25:26,921 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:25:26,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-03 12:25:27,174 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:25:27,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-03 12:25:27,321 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:25:27,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-03 12:25:27,998 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-03 12:25:27,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 27 [2021-10-03 12:25:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:28,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470481026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:28,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:28,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-10-03 12:25:28,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976988850] [2021-10-03 12:25:28,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:25:28,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:25:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:25:28,074 INFO L87 Difference]: Start difference. First operand 3016 states and 13290 transitions. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2021-10-03 12:25:32,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:32,158 INFO L93 Difference]: Finished difference Result 7300 states and 31064 transitions. [2021-10-03 12:25:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-03 12:25:32,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 33 [2021-10-03 12:25:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:32,237 INFO L225 Difference]: With dead ends: 7300 [2021-10-03 12:25:32,237 INFO L226 Difference]: Without dead ends: 7266 [2021-10-03 12:25:32,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3327.2ms TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:25:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2021-10-03 12:25:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 3447. [2021-10-03 12:25:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 4.443702843876959) internal successors, (15313), 3446 states have internal predecessors, (15313), 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) [2021-10-03 12:25:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 15313 transitions. [2021-10-03 12:25:32,462 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 15313 transitions. Word has length 33 [2021-10-03 12:25:32,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:32,462 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 15313 transitions. [2021-10-03 12:25:32,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2021-10-03 12:25:32,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 15313 transitions. [2021-10-03 12:25:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:25:32,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:32,478 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:32,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:32,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-03 12:25:32,691 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:32,692 INFO L82 PathProgramCache]: Analyzing trace with hash -60324952, now seen corresponding path program 4 times [2021-10-03 12:25:32,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:32,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811958333] [2021-10-03 12:25:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:32,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:34,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:34,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811958333] [2021-10-03 12:25:34,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811958333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:34,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854016013] [2021-10-03 12:25:34,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:25:34,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:34,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:34,286 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:34,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-03 12:25:34,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:25:34,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:25:34,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-03 12:25:34,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:34,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:34,767 INFO L354 Elim1Store]: treesize reduction 222, result has 15.9 percent of original size [2021-10-03 12:25:34,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 105 [2021-10-03 12:25:34,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:25:35,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:35,159 INFO L354 Elim1Store]: treesize reduction 76, result has 44.5 percent of original size [2021-10-03 12:25:35,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 52 treesize of output 98 [2021-10-03 12:25:35,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:25:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-03 12:25:35,743 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:25:35,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-03 12:25:35,984 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:25:35,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-03 12:25:36,415 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-03 12:25:36,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2021-10-03 12:25:36,965 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-10-03 12:25:36,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 43 [2021-10-03 12:25:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:37,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854016013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:37,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:37,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2021-10-03 12:25:37,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647907235] [2021-10-03 12:25:37,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:25:37,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:25:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:25:37,110 INFO L87 Difference]: Start difference. First operand 3447 states and 15313 transitions. Second operand has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 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) [2021-10-03 12:25:41,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:41,001 INFO L93 Difference]: Finished difference Result 8697 states and 37293 transitions. [2021-10-03 12:25:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-03 12:25:41,002 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 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 33 [2021-10-03 12:25:41,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:41,053 INFO L225 Difference]: With dead ends: 8697 [2021-10-03 12:25:41,053 INFO L226 Difference]: Without dead ends: 8663 [2021-10-03 12:25:41,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3527.6ms TimeCoverageRelationStatistics Valid=239, Invalid=1741, Unknown=0, NotChecked=0, Total=1980 [2021-10-03 12:25:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2021-10-03 12:25:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 4353. [2021-10-03 12:25:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 4.482536764705882) internal successors, (19508), 4352 states have internal predecessors, (19508), 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) [2021-10-03 12:25:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 19508 transitions. [2021-10-03 12:25:41,349 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 19508 transitions. Word has length 33 [2021-10-03 12:25:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:41,349 INFO L470 AbstractCegarLoop]: Abstraction has 4353 states and 19508 transitions. [2021-10-03 12:25:41,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 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) [2021-10-03 12:25:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 19508 transitions. [2021-10-03 12:25:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:25:41,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:41,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:41,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-03 12:25:41,584 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:41,585 INFO L82 PathProgramCache]: Analyzing trace with hash 172902478, now seen corresponding path program 5 times [2021-10-03 12:25:41,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:41,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821507865] [2021-10-03 12:25:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:41,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:43,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:43,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821507865] [2021-10-03 12:25:43,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821507865] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:43,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302730535] [2021-10-03 12:25:43,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:25:43,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:43,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:43,191 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:43,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-03 12:25:43,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:25:43,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:25:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-03 12:25:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:43,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-10-03 12:25:44,624 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:25:44,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2021-10-03 12:25:44,828 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:25:44,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2021-10-03 12:25:45,236 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-10-03 12:25:45,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 53 [2021-10-03 12:25:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:45,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302730535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:45,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:45,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-10-03 12:25:45,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544992207] [2021-10-03 12:25:45,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:25:45,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:25:45,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:25:45,372 INFO L87 Difference]: Start difference. First operand 4353 states and 19508 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 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) [2021-10-03 12:25:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:48,514 INFO L93 Difference]: Finished difference Result 7060 states and 30474 transitions. [2021-10-03 12:25:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 12:25:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 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 33 [2021-10-03 12:25:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:48,549 INFO L225 Difference]: With dead ends: 7060 [2021-10-03 12:25:48,550 INFO L226 Difference]: Without dead ends: 7043 [2021-10-03 12:25:48,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2838.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2021-10-03 12:25:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2021-10-03 12:25:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 4433. [2021-10-03 12:25:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4432 states have (on average 4.480595667870036) internal successors, (19858), 4432 states have internal predecessors, (19858), 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) [2021-10-03 12:25:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 19858 transitions. [2021-10-03 12:25:48,776 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 19858 transitions. Word has length 33 [2021-10-03 12:25:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:48,777 INFO L470 AbstractCegarLoop]: Abstraction has 4433 states and 19858 transitions. [2021-10-03 12:25:48,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 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) [2021-10-03 12:25:48,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 19858 transitions. [2021-10-03 12:25:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:25:48,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:48,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:48,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:49,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:49,044 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -110770606, now seen corresponding path program 6 times [2021-10-03 12:25:49,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:49,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791889537] [2021-10-03 12:25:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:49,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:50,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:50,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791889537] [2021-10-03 12:25:50,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791889537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:50,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199715387] [2021-10-03 12:25:50,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:25:50,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:50,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:50,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:50,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-03 12:25:50,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:25:50,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:25:50,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-03 12:25:50,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:50,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:50,825 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-03 12:25:50,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-10-03 12:25:51,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:25:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:51,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:51,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:51,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:51,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:51,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:25:51,302 INFO L354 Elim1Store]: treesize reduction 60, result has 42.9 percent of original size [2021-10-03 12:25:51,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 52 treesize of output 82 [2021-10-03 12:25:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:25:51,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:25:51,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:25:52,335 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-03 12:25:52,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-10-03 12:25:52,529 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-03 12:25:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-10-03 12:25:52,899 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-03 12:25:52,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 33 [2021-10-03 12:25:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:52,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199715387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:52,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:52,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-10-03 12:25:52,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935274144] [2021-10-03 12:25:52,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:25:52,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:25:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:25:52,979 INFO L87 Difference]: Start difference. First operand 4433 states and 19858 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2021-10-03 12:25:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:25:55,288 INFO L93 Difference]: Finished difference Result 6126 states and 26626 transitions. [2021-10-03 12:25:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 12:25:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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 33 [2021-10-03 12:25:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:25:55,313 INFO L225 Difference]: With dead ends: 6126 [2021-10-03 12:25:55,313 INFO L226 Difference]: Without dead ends: 6109 [2021-10-03 12:25:55,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2331.8ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:25:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2021-10-03 12:25:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 4427. [2021-10-03 12:25:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 4426 states have (on average 4.483958427474017) internal successors, (19846), 4426 states have internal predecessors, (19846), 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) [2021-10-03 12:25:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 19846 transitions. [2021-10-03 12:25:55,490 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 19846 transitions. Word has length 33 [2021-10-03 12:25:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:25:55,490 INFO L470 AbstractCegarLoop]: Abstraction has 4427 states and 19846 transitions. [2021-10-03 12:25:55,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2021-10-03 12:25:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 19846 transitions. [2021-10-03 12:25:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:25:55,567 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:25:55,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:25:55,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-03 12:25:55,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-03 12:25:55,782 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:25:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:25:55,783 INFO L82 PathProgramCache]: Analyzing trace with hash -637713330, now seen corresponding path program 7 times [2021-10-03 12:25:55,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:25:55,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253272804] [2021-10-03 12:25:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:25:55,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:25:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:25:57,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:25:57,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253272804] [2021-10-03 12:25:57,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253272804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:57,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547365004] [2021-10-03 12:25:57,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:25:57,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:25:57,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:25:57,192 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:25:57,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-03 12:25:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:25:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-03 12:25:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:25:57,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 222 [2021-10-03 12:25:58,382 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:25:58,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-10-03 12:25:58,581 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:25:58,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 47 [2021-10-03 12:25:58,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:25:58,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-10-03 12:25:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:25:58,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547365004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:25:58,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:25:58,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-03 12:25:58,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339762704] [2021-10-03 12:25:58,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-03 12:25:58,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:25:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-03 12:25:58,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-10-03 12:25:58,779 INFO L87 Difference]: Start difference. First operand 4427 states and 19846 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 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) [2021-10-03 12:26:01,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:01,316 INFO L93 Difference]: Finished difference Result 7686 states and 33177 transitions. [2021-10-03 12:26:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:26:01,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 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 33 [2021-10-03 12:26:01,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:01,341 INFO L225 Difference]: With dead ends: 7686 [2021-10-03 12:26:01,342 INFO L226 Difference]: Without dead ends: 7669 [2021-10-03 12:26:01,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2353.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 12:26:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2021-10-03 12:26:01,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 4475. [2021-10-03 12:26:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 4.477425122932499) internal successors, (20032), 4474 states have internal predecessors, (20032), 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) [2021-10-03 12:26:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 20032 transitions. [2021-10-03 12:26:01,534 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 20032 transitions. Word has length 33 [2021-10-03 12:26:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:01,535 INFO L470 AbstractCegarLoop]: Abstraction has 4475 states and 20032 transitions. [2021-10-03 12:26:01,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 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) [2021-10-03 12:26:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 20032 transitions. [2021-10-03 12:26:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:01,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:01,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:01,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-03 12:26:01,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:01,768 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:01,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1577715664, now seen corresponding path program 8 times [2021-10-03 12:26:01,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:01,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060795512] [2021-10-03 12:26:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:01,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:02,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:02,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060795512] [2021-10-03 12:26:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060795512] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:02,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943661974] [2021-10-03 12:26:02,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:26:02,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:02,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:02,778 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:26:02,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-03 12:26:03,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:26:03,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:26:03,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-03 12:26:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:03,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:26:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:26:03,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:26:04,118 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:26:04,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:26:04,243 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:26:04,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:26:04,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:26:04,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2021-10-03 12:26:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:04,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943661974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:04,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:04,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-10-03 12:26:04,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347117702] [2021-10-03 12:26:04,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:26:04,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:26:04,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:26:04,625 INFO L87 Difference]: Start difference. First operand 4475 states and 20032 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2021-10-03 12:26:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:09,089 INFO L93 Difference]: Finished difference Result 8215 states and 35079 transitions. [2021-10-03 12:26:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-03 12:26:09,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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 33 [2021-10-03 12:26:09,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:09,128 INFO L225 Difference]: With dead ends: 8215 [2021-10-03 12:26:09,128 INFO L226 Difference]: Without dead ends: 8198 [2021-10-03 12:26:09,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2739.7ms TimeCoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2021-10-03 12:26:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8198 states. [2021-10-03 12:26:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8198 to 4504. [2021-10-03 12:26:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4503 states have (on average 4.483455474128359) internal successors, (20189), 4503 states have internal predecessors, (20189), 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) [2021-10-03 12:26:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 20189 transitions. [2021-10-03 12:26:09,394 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 20189 transitions. Word has length 33 [2021-10-03 12:26:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:09,395 INFO L470 AbstractCegarLoop]: Abstraction has 4504 states and 20189 transitions. [2021-10-03 12:26:09,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2021-10-03 12:26:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 20189 transitions. [2021-10-03 12:26:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:09,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:09,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:09,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-03 12:26:09,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:09,628 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1423540172, now seen corresponding path program 9 times [2021-10-03 12:26:09,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:09,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202716581] [2021-10-03 12:26:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:09,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:10,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:10,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202716581] [2021-10-03 12:26:10,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202716581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:10,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404813161] [2021-10-03 12:26:10,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:26:10,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:10,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:10,633 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:26:10,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-03 12:26:11,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:26:11,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:26:11,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-03 12:26:11,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:11,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:26:11,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:26:11,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:26:11,935 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:26:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:26:12,047 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:26:12,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:26:12,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:26:12,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-10-03 12:26:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:26:12,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404813161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:12,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:12,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-10-03 12:26:12,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652912080] [2021-10-03 12:26:12,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-03 12:26:12,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-03 12:26:12,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-10-03 12:26:12,388 INFO L87 Difference]: Start difference. First operand 4504 states and 20189 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 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) [2021-10-03 12:26:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:14,538 INFO L93 Difference]: Finished difference Result 7771 states and 34031 transitions. [2021-10-03 12:26:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:26:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 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 33 [2021-10-03 12:26:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:14,564 INFO L225 Difference]: With dead ends: 7771 [2021-10-03 12:26:14,564 INFO L226 Difference]: Without dead ends: 7737 [2021-10-03 12:26:14,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1826.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:26:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7737 states. [2021-10-03 12:26:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7737 to 4560. [2021-10-03 12:26:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4560 states, 4559 states have (on average 4.48212327264751) internal successors, (20434), 4559 states have internal predecessors, (20434), 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) [2021-10-03 12:26:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 20434 transitions. [2021-10-03 12:26:14,764 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 20434 transitions. Word has length 33 [2021-10-03 12:26:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:14,765 INFO L470 AbstractCegarLoop]: Abstraction has 4560 states and 20434 transitions. [2021-10-03 12:26:14,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 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) [2021-10-03 12:26:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 20434 transitions. [2021-10-03 12:26:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:14,781 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:14,781 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:14,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-03 12:26:14,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-03 12:26:14,996 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:14,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash -567412128, now seen corresponding path program 10 times [2021-10-03 12:26:14,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:14,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594331350] [2021-10-03 12:26:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:14,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:16,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:16,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594331350] [2021-10-03 12:26:16,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594331350] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:16,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484395509] [2021-10-03 12:26:16,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:26:16,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:16,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:16,038 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:26:16,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-03 12:26:16,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:26:16,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:26:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-03 12:26:16,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:17,391 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-03 12:26:17,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-03 12:26:17,547 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-03 12:26:17,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-03 12:26:18,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:26:18,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 79 [2021-10-03 12:26:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:18,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484395509] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:18,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:18,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-10-03 12:26:18,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098291663] [2021-10-03 12:26:18,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:26:18,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:26:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:26:18,175 INFO L87 Difference]: Start difference. First operand 4560 states and 20434 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2021-10-03 12:26:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:20,789 INFO L93 Difference]: Finished difference Result 8007 states and 34645 transitions. [2021-10-03 12:26:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:26:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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 33 [2021-10-03 12:26:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:20,815 INFO L225 Difference]: With dead ends: 8007 [2021-10-03 12:26:20,816 INFO L226 Difference]: Without dead ends: 7990 [2021-10-03 12:26:20,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2382.9ms TimeCoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:26:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-10-03 12:26:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 4580. [2021-10-03 12:26:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 4.481327800829876) internal successors, (20520), 4579 states have internal predecessors, (20520), 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) [2021-10-03 12:26:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 20520 transitions. [2021-10-03 12:26:20,991 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 20520 transitions. Word has length 33 [2021-10-03 12:26:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:20,992 INFO L470 AbstractCegarLoop]: Abstraction has 4580 states and 20520 transitions. [2021-10-03 12:26:20,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2021-10-03 12:26:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 20520 transitions. [2021-10-03 12:26:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:21,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:21,008 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:21,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-03 12:26:21,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:21,223 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:21,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1627471184, now seen corresponding path program 11 times [2021-10-03 12:26:21,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:21,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642393794] [2021-10-03 12:26:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:21,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:22,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:22,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642393794] [2021-10-03 12:26:22,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642393794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:22,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358539969] [2021-10-03 12:26:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:26:22,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:22,277 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:26:22,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-03 12:26:23,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:26:23,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:26:23,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-03 12:26:23,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:23,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,203 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-03 12:26:23,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 80 [2021-10-03 12:26:23,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:26:23,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:23,619 INFO L354 Elim1Store]: treesize reduction 64, result has 43.4 percent of original size [2021-10-03 12:26:23,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 86 [2021-10-03 12:26:23,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:26:23,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:26:24,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:26:24,476 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:26:24,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-10-03 12:26:24,647 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:26:24,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-10-03 12:26:25,264 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-03 12:26:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 35 [2021-10-03 12:26:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:25,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358539969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:25,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:25,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2021-10-03 12:26:25,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574728327] [2021-10-03 12:26:25,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:26:25,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:25,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:26:25,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:26:25,359 INFO L87 Difference]: Start difference. First operand 4580 states and 20520 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2021-10-03 12:26:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:28,137 INFO L93 Difference]: Finished difference Result 7533 states and 32454 transitions. [2021-10-03 12:26:28,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:26:28,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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 33 [2021-10-03 12:26:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:28,173 INFO L225 Difference]: With dead ends: 7533 [2021-10-03 12:26:28,173 INFO L226 Difference]: Without dead ends: 7516 [2021-10-03 12:26:28,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 2697.6ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-10-03 12:26:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-10-03 12:26:28,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 4580. [2021-10-03 12:26:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 4.481327800829876) internal successors, (20520), 4579 states have internal predecessors, (20520), 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) [2021-10-03 12:26:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 20520 transitions. [2021-10-03 12:26:28,378 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 20520 transitions. Word has length 33 [2021-10-03 12:26:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:28,378 INFO L470 AbstractCegarLoop]: Abstraction has 4580 states and 20520 transitions. [2021-10-03 12:26:28,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2021-10-03 12:26:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 20520 transitions. [2021-10-03 12:26:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:28,395 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:28,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:28,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-03 12:26:28,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:28,610 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:28,611 INFO L82 PathProgramCache]: Analyzing trace with hash -25857460, now seen corresponding path program 12 times [2021-10-03 12:26:28,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:28,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750025783] [2021-10-03 12:26:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:28,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:30,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:30,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750025783] [2021-10-03 12:26:30,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750025783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:30,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048306189] [2021-10-03 12:26:30,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:26:30,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:30,007 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:26:30,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-03 12:26:30,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:26:30,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:26:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-03 12:26:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:31,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:26:31,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:26:31,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:26:31,515 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:26:31,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:26:31,809 INFO L354 Elim1Store]: treesize reduction 80, result has 30.4 percent of original size [2021-10-03 12:26:31,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 55 [2021-10-03 12:26:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:26:31,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048306189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:31,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:31,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-10-03 12:26:31,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105009610] [2021-10-03 12:26:31,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:26:31,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:31,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:26:31,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:26:31,974 INFO L87 Difference]: Start difference. First operand 4580 states and 20520 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2021-10-03 12:26:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:37,908 INFO L93 Difference]: Finished difference Result 11710 states and 50371 transitions. [2021-10-03 12:26:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-03 12:26:37,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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 33 [2021-10-03 12:26:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:37,963 INFO L225 Difference]: With dead ends: 11710 [2021-10-03 12:26:37,963 INFO L226 Difference]: Without dead ends: 11676 [2021-10-03 12:26:37,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 4315.7ms TimeCoverageRelationStatistics Valid=346, Invalid=2204, Unknown=0, NotChecked=0, Total=2550 [2021-10-03 12:26:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11676 states. [2021-10-03 12:26:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11676 to 4858. [2021-10-03 12:26:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4858 states, 4857 states have (on average 4.53242742433601) internal successors, (22014), 4857 states have internal predecessors, (22014), 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) [2021-10-03 12:26:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4858 states to 4858 states and 22014 transitions. [2021-10-03 12:26:38,291 INFO L78 Accepts]: Start accepts. Automaton has 4858 states and 22014 transitions. Word has length 33 [2021-10-03 12:26:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:38,292 INFO L470 AbstractCegarLoop]: Abstraction has 4858 states and 22014 transitions. [2021-10-03 12:26:38,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 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) [2021-10-03 12:26:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4858 states and 22014 transitions. [2021-10-03 12:26:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:38,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:38,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:38,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-03 12:26:38,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-03 12:26:38,512 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1412335142, now seen corresponding path program 13 times [2021-10-03 12:26:38,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:38,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796425687] [2021-10-03 12:26:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:38,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:40,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:40,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796425687] [2021-10-03 12:26:40,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796425687] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:40,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80116446] [2021-10-03 12:26:40,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:26:40,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:40,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:40,507 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:26:40,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-03 12:26:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-03 12:26:41,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:41,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 101 [2021-10-03 12:26:42,306 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:26:42,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-03 12:26:42,622 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:26:42,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 47 [2021-10-03 12:26:42,859 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-10-03 12:26:42,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2021-10-03 12:26:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:42,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80116446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:42,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:42,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-10-03 12:26:42,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218520259] [2021-10-03 12:26:42,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:26:42,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:42,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:26:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:26:42,995 INFO L87 Difference]: Start difference. First operand 4858 states and 22014 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2021-10-03 12:26:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:48,569 INFO L93 Difference]: Finished difference Result 11606 states and 50811 transitions. [2021-10-03 12:26:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:26:48,569 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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 33 [2021-10-03 12:26:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:48,628 INFO L225 Difference]: With dead ends: 11606 [2021-10-03 12:26:48,628 INFO L226 Difference]: Without dead ends: 11572 [2021-10-03 12:26:48,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 4529.8ms TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2021-10-03 12:26:48,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-10-03 12:26:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 5005. [2021-10-03 12:26:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5005 states, 5004 states have (on average 4.546362909672262) internal successors, (22750), 5004 states have internal predecessors, (22750), 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) [2021-10-03 12:26:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5005 states to 5005 states and 22750 transitions. [2021-10-03 12:26:48,899 INFO L78 Accepts]: Start accepts. Automaton has 5005 states and 22750 transitions. Word has length 33 [2021-10-03 12:26:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:48,899 INFO L470 AbstractCegarLoop]: Abstraction has 5005 states and 22750 transitions. [2021-10-03 12:26:48,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2021-10-03 12:26:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 5005 states and 22750 transitions. [2021-10-03 12:26:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:48,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:48,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:48,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-03 12:26:49,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-03 12:26:49,137 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash -782826444, now seen corresponding path program 14 times [2021-10-03 12:26:49,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:49,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406980273] [2021-10-03 12:26:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:49,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:50,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:50,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406980273] [2021-10-03 12:26:50,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406980273] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:50,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230953628] [2021-10-03 12:26:50,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:26:50,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:50,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:50,756 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:26:50,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-03 12:26:51,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:26:51,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:26:51,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-03 12:26:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:51,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:51,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:51,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:51,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:51,907 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-03 12:26:51,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 59 [2021-10-03 12:26:52,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:26:52,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:52,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:52,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:52,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:52,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:52,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:52,381 INFO L354 Elim1Store]: treesize reduction 60, result has 42.9 percent of original size [2021-10-03 12:26:52,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 52 treesize of output 82 [2021-10-03 12:26:52,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:26:52,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:26:52,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:26:53,371 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:26:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-03 12:26:53,686 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-03 12:26:53,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 48 [2021-10-03 12:26:53,945 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-03 12:26:53,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 27 [2021-10-03 12:26:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:54,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230953628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:54,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:54,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-10-03 12:26:54,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279165389] [2021-10-03 12:26:54,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:26:54,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:54,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:26:54,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:26:54,038 INFO L87 Difference]: Start difference. First operand 5005 states and 22750 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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) [2021-10-03 12:26:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:57,967 INFO L93 Difference]: Finished difference Result 12802 states and 56393 transitions. [2021-10-03 12:26:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:26:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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 33 [2021-10-03 12:26:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:58,015 INFO L225 Difference]: With dead ends: 12802 [2021-10-03 12:26:58,015 INFO L226 Difference]: Without dead ends: 12768 [2021-10-03 12:26:58,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 3753.5ms TimeCoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2021-10-03 12:26:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12768 states. [2021-10-03 12:26:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12768 to 5163. [2021-10-03 12:26:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 4.577295621851995) internal successors, (23628), 5162 states have internal predecessors, (23628), 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) [2021-10-03 12:26:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 23628 transitions. [2021-10-03 12:26:58,224 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 23628 transitions. Word has length 33 [2021-10-03 12:26:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:58,225 INFO L470 AbstractCegarLoop]: Abstraction has 5163 states and 23628 transitions. [2021-10-03 12:26:58,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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) [2021-10-03 12:26:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 23628 transitions. [2021-10-03 12:26:58,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:58,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:58,284 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:58,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-03 12:26:58,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:58,485 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:58,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:58,487 INFO L82 PathProgramCache]: Analyzing trace with hash -214454002, now seen corresponding path program 15 times [2021-10-03 12:26:58,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:58,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557916451] [2021-10-03 12:26:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:58,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:00,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:00,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557916451] [2021-10-03 12:27:00,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557916451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:00,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282182600] [2021-10-03 12:27:00,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:27:00,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:00,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:00,267 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:27:00,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-03 12:27:01,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:27:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:01,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-03 12:27:01,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:04,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:27:04,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-10-03 12:27:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:27:04,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282182600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:04,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:04,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2021-10-03 12:27:04,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978955432] [2021-10-03 12:27:04,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:27:04,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:27:04,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=364, Unknown=1, NotChecked=0, Total=420 [2021-10-03 12:27:04,117 INFO L87 Difference]: Start difference. First operand 5163 states and 23628 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2021-10-03 12:27:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:05,818 INFO L93 Difference]: Finished difference Result 6392 states and 28817 transitions. [2021-10-03 12:27:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:27:05,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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 33 [2021-10-03 12:27:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:05,840 INFO L225 Difference]: With dead ends: 6392 [2021-10-03 12:27:05,840 INFO L226 Difference]: Without dead ends: 6375 [2021-10-03 12:27:05,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3773.9ms TimeCoverageRelationStatistics Valid=118, Invalid=751, Unknown=1, NotChecked=0, Total=870 [2021-10-03 12:27:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2021-10-03 12:27:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 5171. [2021-10-03 12:27:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5170 states have (on average 4.576402321083172) internal successors, (23660), 5170 states have internal predecessors, (23660), 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) [2021-10-03 12:27:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 23660 transitions. [2021-10-03 12:27:06,049 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 23660 transitions. Word has length 33 [2021-10-03 12:27:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:06,049 INFO L470 AbstractCegarLoop]: Abstraction has 5171 states and 23660 transitions. [2021-10-03 12:27:06,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2021-10-03 12:27:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 23660 transitions. [2021-10-03 12:27:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:27:06,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:06,061 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:06,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-03 12:27:06,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-03 12:27:06,262 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2075048696, now seen corresponding path program 16 times [2021-10-03 12:27:06,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:06,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996377305] [2021-10-03 12:27:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:06,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:07,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:07,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996377305] [2021-10-03 12:27:07,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996377305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:07,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886384779] [2021-10-03 12:27:07,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:27:07,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:07,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:07,205 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:27:07,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-03 12:27:08,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:27:08,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:08,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-03 12:27:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:08,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:08,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:08,463 INFO L354 Elim1Store]: treesize reduction 222, result has 15.9 percent of original size [2021-10-03 12:27:08,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 160 treesize of output 177 [2021-10-03 12:27:08,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:27:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:08,893 INFO L354 Elim1Store]: treesize reduction 76, result has 44.5 percent of original size [2021-10-03 12:27:08,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 52 treesize of output 98 [2021-10-03 12:27:09,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-03 12:27:09,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:27:09,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:27:09,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:27:09,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:27:09,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:27:09,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 77 [2021-10-03 12:27:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:10,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886384779] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:10,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:10,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-10-03 12:27:10,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142506715] [2021-10-03 12:27:10,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:27:10,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:27:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:27:10,149 INFO L87 Difference]: Start difference. First operand 5171 states and 23660 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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) [2021-10-03 12:27:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:15,368 INFO L93 Difference]: Finished difference Result 14229 states and 61710 transitions. [2021-10-03 12:27:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-03 12:27:15,369 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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 33 [2021-10-03 12:27:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:15,420 INFO L225 Difference]: With dead ends: 14229 [2021-10-03 12:27:15,420 INFO L226 Difference]: Without dead ends: 14195 [2021-10-03 12:27:15,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 3941.3ms TimeCoverageRelationStatistics Valid=353, Invalid=2403, Unknown=0, NotChecked=0, Total=2756 [2021-10-03 12:27:15,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14195 states. [2021-10-03 12:27:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14195 to 5230. [2021-10-03 12:27:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5230 states, 5229 states have (on average 4.573532224134634) internal successors, (23915), 5229 states have internal predecessors, (23915), 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) [2021-10-03 12:27:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5230 states to 5230 states and 23915 transitions. [2021-10-03 12:27:15,631 INFO L78 Accepts]: Start accepts. Automaton has 5230 states and 23915 transitions. Word has length 33 [2021-10-03 12:27:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:15,632 INFO L470 AbstractCegarLoop]: Abstraction has 5230 states and 23915 transitions. [2021-10-03 12:27:15,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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) [2021-10-03 12:27:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5230 states and 23915 transitions. [2021-10-03 12:27:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:27:15,644 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:15,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:15,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-03 12:27:15,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-03 12:27:15,845 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:15,846 INFO L82 PathProgramCache]: Analyzing trace with hash 962042254, now seen corresponding path program 17 times [2021-10-03 12:27:15,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:15,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710899046] [2021-10-03 12:27:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:15,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:16,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:16,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710899046] [2021-10-03 12:27:16,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710899046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:16,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427476429] [2021-10-03 12:27:16,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:27:16,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:16,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:16,780 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:27:16,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-03 12:27:17,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:27:17,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:17,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-03 12:27:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:18,045 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-03 12:27:18,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 80 [2021-10-03 12:27:18,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:27:18,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:18,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:18,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:18,464 INFO L354 Elim1Store]: treesize reduction 76, result has 44.5 percent of original size [2021-10-03 12:27:18,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 52 treesize of output 98 [2021-10-03 12:27:18,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-10-03 12:27:18,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:27:18,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:27:18,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:27:18,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:27:19,674 INFO L354 Elim1Store]: treesize reduction 33, result has 42.1 percent of original size [2021-10-03 12:27:19,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 57 [2021-10-03 12:27:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:19,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427476429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:19,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:19,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-10-03 12:27:19,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034997252] [2021-10-03 12:27:19,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:27:19,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:27:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:27:19,784 INFO L87 Difference]: Start difference. First operand 5230 states and 23915 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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) [2021-10-03 12:27:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:24,550 INFO L93 Difference]: Finished difference Result 9395 states and 40707 transitions. [2021-10-03 12:27:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:27:24,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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 33 [2021-10-03 12:27:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:24,589 INFO L225 Difference]: With dead ends: 9395 [2021-10-03 12:27:24,589 INFO L226 Difference]: Without dead ends: 9378 [2021-10-03 12:27:24,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 3685.3ms TimeCoverageRelationStatistics Valid=239, Invalid=1741, Unknown=0, NotChecked=0, Total=1980 [2021-10-03 12:27:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9378 states. [2021-10-03 12:27:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9378 to 5247. [2021-10-03 12:27:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5247 states, 5246 states have (on average 4.566908120472741) internal successors, (23958), 5246 states have internal predecessors, (23958), 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) [2021-10-03 12:27:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5247 states to 5247 states and 23958 transitions. [2021-10-03 12:27:24,767 INFO L78 Accepts]: Start accepts. Automaton has 5247 states and 23958 transitions. Word has length 33 [2021-10-03 12:27:24,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:24,767 INFO L470 AbstractCegarLoop]: Abstraction has 5247 states and 23958 transitions. [2021-10-03 12:27:24,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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) [2021-10-03 12:27:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 5247 states and 23958 transitions. [2021-10-03 12:27:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:27:24,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:24,779 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:24,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-03 12:27:24,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-03 12:27:24,981 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:24,982 INFO L82 PathProgramCache]: Analyzing trace with hash 105862770, now seen corresponding path program 18 times [2021-10-03 12:27:24,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:24,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114396954] [2021-10-03 12:27:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:24,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:25,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:25,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114396954] [2021-10-03 12:27:25,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114396954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:25,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615179585] [2021-10-03 12:27:25,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:27:25,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:25,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:25,945 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:27:25,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-03 12:27:27,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:27:27,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:27,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-03 12:27:27,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:27,727 INFO L354 Elim1Store]: treesize reduction 80, result has 30.4 percent of original size [2021-10-03 12:27:27,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 61 [2021-10-03 12:27:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:27:27,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615179585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:27,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:27,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-03 12:27:27,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888922993] [2021-10-03 12:27:27,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:27:27,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:27:27,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:27:27,886 INFO L87 Difference]: Start difference. First operand 5247 states and 23958 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2021-10-03 12:27:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:30,533 INFO L93 Difference]: Finished difference Result 8213 states and 35906 transitions. [2021-10-03 12:27:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-03 12:27:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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 33 [2021-10-03 12:27:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:30,560 INFO L225 Difference]: With dead ends: 8213 [2021-10-03 12:27:30,560 INFO L226 Difference]: Without dead ends: 8196 [2021-10-03 12:27:30,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1933.9ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-10-03 12:27:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8196 states. [2021-10-03 12:27:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8196 to 5274. [2021-10-03 12:27:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5274 states, 5273 states have (on average 4.5634363739806565) internal successors, (24063), 5273 states have internal predecessors, (24063), 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) [2021-10-03 12:27:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5274 states to 5274 states and 24063 transitions. [2021-10-03 12:27:30,694 INFO L78 Accepts]: Start accepts. Automaton has 5274 states and 24063 transitions. Word has length 33 [2021-10-03 12:27:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:30,694 INFO L470 AbstractCegarLoop]: Abstraction has 5274 states and 24063 transitions. [2021-10-03 12:27:30,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2021-10-03 12:27:30,695 INFO L276 IsEmpty]: Start isEmpty. Operand 5274 states and 24063 transitions. [2021-10-03 12:27:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:27:30,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:30,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:30,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-03 12:27:30,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:30,907 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:30,908 INFO L82 PathProgramCache]: Analyzing trace with hash -770516020, now seen corresponding path program 19 times [2021-10-03 12:27:30,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:30,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132557427] [2021-10-03 12:27:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:30,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:32,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:32,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132557427] [2021-10-03 12:27:32,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132557427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:32,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776371928] [2021-10-03 12:27:32,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:27:32,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:32,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:32,099 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:27:32,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-03 12:27:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-03 12:27:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:33,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-10-03 12:27:33,987 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:27:33,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 47 [2021-10-03 12:27:34,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:27:34,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-10-03 12:27:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:27:34,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776371928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:34,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:34,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-03 12:27:34,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870039983] [2021-10-03 12:27:34,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:27:34,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:27:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:27:34,309 INFO L87 Difference]: Start difference. First operand 5274 states and 24063 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2021-10-03 12:27:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:38,873 INFO L93 Difference]: Finished difference Result 8561 states and 37295 transitions. [2021-10-03 12:27:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:27:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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 33 [2021-10-03 12:27:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:38,918 INFO L225 Difference]: With dead ends: 8561 [2021-10-03 12:27:38,918 INFO L226 Difference]: Without dead ends: 8544 [2021-10-03 12:27:38,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1968.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:27:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8544 states. [2021-10-03 12:27:39,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8544 to 5286. [2021-10-03 12:27:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5286 states, 5285 states have (on average 4.562913907284768) internal successors, (24115), 5285 states have internal predecessors, (24115), 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) [2021-10-03 12:27:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5286 states to 5286 states and 24115 transitions. [2021-10-03 12:27:39,168 INFO L78 Accepts]: Start accepts. Automaton has 5286 states and 24115 transitions. Word has length 33 [2021-10-03 12:27:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 5286 states and 24115 transitions. [2021-10-03 12:27:39,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2021-10-03 12:27:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5286 states and 24115 transitions. [2021-10-03 12:27:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:27:39,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:39,188 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:39,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-03 12:27:39,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:39,401 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:39,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:39,402 INFO L82 PathProgramCache]: Analyzing trace with hash 854839800, now seen corresponding path program 20 times [2021-10-03 12:27:39,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:39,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142863794] [2021-10-03 12:27:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:39,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:40,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:40,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142863794] [2021-10-03 12:27:40,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142863794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:40,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089002333] [2021-10-03 12:27:40,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:27:40,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:40,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:40,687 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:27:40,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-03 12:27:41,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:27:41,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-03 12:27:41,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:41,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-10-03 12:27:42,412 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:27:42,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 47 [2021-10-03 12:27:42,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:27:42,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-03 12:27:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:27:42,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089002333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:42,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:42,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2021-10-03 12:27:42,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144697418] [2021-10-03 12:27:42,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:27:42,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:27:42,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:27:42,667 INFO L87 Difference]: Start difference. First operand 5286 states and 24115 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 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) [2021-10-03 12:27:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:44,638 INFO L93 Difference]: Finished difference Result 8481 states and 37362 transitions. [2021-10-03 12:27:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:27:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 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 33 [2021-10-03 12:27:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:44,666 INFO L225 Difference]: With dead ends: 8481 [2021-10-03 12:27:44,666 INFO L226 Difference]: Without dead ends: 8447 [2021-10-03 12:27:44,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1765.4ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:27:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2021-10-03 12:27:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 5343. [2021-10-03 12:27:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5343 states, 5342 states have (on average 4.567016098839386) internal successors, (24397), 5342 states have internal predecessors, (24397), 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) [2021-10-03 12:27:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 24397 transitions. [2021-10-03 12:27:44,806 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 24397 transitions. Word has length 33 [2021-10-03 12:27:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:44,807 INFO L470 AbstractCegarLoop]: Abstraction has 5343 states and 24397 transitions. [2021-10-03 12:27:44,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 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) [2021-10-03 12:27:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 24397 transitions. [2021-10-03 12:27:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:27:44,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:44,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:44,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-03 12:27:45,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-03 12:27:45,023 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1142365938, now seen corresponding path program 21 times [2021-10-03 12:27:45,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:45,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055699683] [2021-10-03 12:27:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:45,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:46,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:46,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055699683] [2021-10-03 12:27:46,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055699683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:46,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31005828] [2021-10-03 12:27:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:27:46,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:46,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:46,201 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:27:46,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-03 12:27:47,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:27:47,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:47,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-03 12:27:47,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:47,927 INFO L354 Elim1Store]: treesize reduction 80, result has 30.4 percent of original size [2021-10-03 12:27:47,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 55 [2021-10-03 12:27:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:27:48,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31005828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:48,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:48,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2021-10-03 12:27:48,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869084865] [2021-10-03 12:27:48,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:27:48,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:27:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:27:48,079 INFO L87 Difference]: Start difference. First operand 5343 states and 24397 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 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) [2021-10-03 12:27:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:50,768 INFO L93 Difference]: Finished difference Result 8749 states and 38102 transitions. [2021-10-03 12:27:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-03 12:27:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 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 33 [2021-10-03 12:27:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:50,796 INFO L225 Difference]: With dead ends: 8749 [2021-10-03 12:27:50,797 INFO L226 Difference]: Without dead ends: 8732 [2021-10-03 12:27:50,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1950.6ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:27:50,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8732 states. [2021-10-03 12:27:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8732 to 5355. [2021-10-03 12:27:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 5354 states have (on average 4.563877474785207) internal successors, (24435), 5354 states have internal predecessors, (24435), 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) [2021-10-03 12:27:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 24435 transitions. [2021-10-03 12:27:50,961 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 24435 transitions. Word has length 33 [2021-10-03 12:27:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:50,961 INFO L470 AbstractCegarLoop]: Abstraction has 5355 states and 24435 transitions. [2021-10-03 12:27:50,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 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) [2021-10-03 12:27:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 24435 transitions. [2021-10-03 12:27:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:27:50,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:50,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:51,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-03 12:27:51,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:51,192 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:51,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash 979694002, now seen corresponding path program 22 times [2021-10-03 12:27:51,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:51,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773365381] [2021-10-03 12:27:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:51,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:52,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:52,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773365381] [2021-10-03 12:27:52,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773365381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:52,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406771357] [2021-10-03 12:27:52,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:27:52,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:52,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:52,790 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:27:52,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-03 12:27:54,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:27:54,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:54,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-03 12:27:54,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:54,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 365 [2021-10-03 12:27:54,584 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:27:54,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-03 12:27:55,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:27:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 71 [2021-10-03 12:27:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:27:55,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406771357] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:55,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:55,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-10-03 12:27:55,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262712461] [2021-10-03 12:27:55,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:27:55,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:55,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:27:55,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:27:55,185 INFO L87 Difference]: Start difference. First operand 5355 states and 24435 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2021-10-03 12:28:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:05,400 INFO L93 Difference]: Finished difference Result 18479 states and 78587 transitions. [2021-10-03 12:28:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-03 12:28:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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 33 [2021-10-03 12:28:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:05,464 INFO L225 Difference]: With dead ends: 18479 [2021-10-03 12:28:05,464 INFO L226 Difference]: Without dead ends: 18411 [2021-10-03 12:28:05,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 7125.2ms TimeCoverageRelationStatistics Valid=656, Invalid=5044, Unknown=0, NotChecked=0, Total=5700 [2021-10-03 12:28:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18411 states. [2021-10-03 12:28:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18411 to 6179. [2021-10-03 12:28:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6179 states, 6178 states have (on average 4.631919715118161) internal successors, (28616), 6178 states have internal predecessors, (28616), 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) [2021-10-03 12:28:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 28616 transitions. [2021-10-03 12:28:05,762 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 28616 transitions. Word has length 33 [2021-10-03 12:28:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:05,762 INFO L470 AbstractCegarLoop]: Abstraction has 6179 states and 28616 transitions. [2021-10-03 12:28:05,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2021-10-03 12:28:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 28616 transitions. [2021-10-03 12:28:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:28:05,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:05,779 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:05,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-03 12:28:05,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:05,994 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:05,995 INFO L82 PathProgramCache]: Analyzing trace with hash 54540264, now seen corresponding path program 23 times [2021-10-03 12:28:05,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:05,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286368707] [2021-10-03 12:28:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:05,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:07,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:07,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286368707] [2021-10-03 12:28:07,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286368707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:07,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151615013] [2021-10-03 12:28:07,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:28:07,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:07,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:07,497 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:28:07,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-03 12:28:08,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:28:08,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:28:08,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-03 12:28:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:28:08,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:08,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:08,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:08,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-10-03 12:28:09,704 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:28:09,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2021-10-03 12:28:10,326 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:28:10,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 59 [2021-10-03 12:28:10,515 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:28:10,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 59 [2021-10-03 12:28:10,992 INFO L354 Elim1Store]: treesize reduction 27, result has 44.9 percent of original size [2021-10-03 12:28:10,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 46 [2021-10-03 12:28:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:28:11,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151615013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:11,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:28:11,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-10-03 12:28:11,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074943499] [2021-10-03 12:28:11,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:28:11,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:28:11,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:28:11,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:28:11,073 INFO L87 Difference]: Start difference. First operand 6179 states and 28616 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 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) [2021-10-03 12:28:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:15,469 INFO L93 Difference]: Finished difference Result 8186 states and 36382 transitions. [2021-10-03 12:28:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:28:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 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 34 [2021-10-03 12:28:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:15,496 INFO L225 Difference]: With dead ends: 8186 [2021-10-03 12:28:15,496 INFO L226 Difference]: Without dead ends: 8169 [2021-10-03 12:28:15,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3605.4ms TimeCoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2021-10-03 12:28:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2021-10-03 12:28:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 6305. [2021-10-03 12:28:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 6304 states have (on average 4.608026649746193) internal successors, (29049), 6304 states have internal predecessors, (29049), 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) [2021-10-03 12:28:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 29049 transitions. [2021-10-03 12:28:15,658 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 29049 transitions. Word has length 34 [2021-10-03 12:28:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:15,658 INFO L470 AbstractCegarLoop]: Abstraction has 6305 states and 29049 transitions. [2021-10-03 12:28:15,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 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) [2021-10-03 12:28:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 29049 transitions. [2021-10-03 12:28:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:28:15,674 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:15,674 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:15,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-03 12:28:15,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-03 12:28:15,881 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:15,882 INFO L82 PathProgramCache]: Analyzing trace with hash 270218024, now seen corresponding path program 24 times [2021-10-03 12:28:15,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:15,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216534184] [2021-10-03 12:28:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:15,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:17,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:17,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216534184] [2021-10-03 12:28:17,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216534184] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:17,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015593023] [2021-10-03 12:28:17,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:28:17,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:17,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:17,994 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:28:18,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-03 12:28:19,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 12:28:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:28:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-03 12:28:19,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:28:19,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:19,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:19,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:19,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:19,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:19,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:19,616 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-03 12:28:19,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 76 [2021-10-03 12:28:19,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:28:20,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:20,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:20,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:20,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:20,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:20,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:20,202 INFO L354 Elim1Store]: treesize reduction 64, result has 43.4 percent of original size [2021-10-03 12:28:20,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 86 [2021-10-03 12:28:20,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:28:20,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:28:20,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 160 [2021-10-03 12:28:21,315 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:28:21,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 103 [2021-10-03 12:28:21,911 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:28:21,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 65 [2021-10-03 12:28:22,102 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:28:22,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2021-10-03 12:28:22,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:28:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2021-10-03 12:28:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:22,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015593023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:22,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:28:22,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-10-03 12:28:22,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665176140] [2021-10-03 12:28:22,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:28:22,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:28:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:28:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:28:22,396 INFO L87 Difference]: Start difference. First operand 6305 states and 29049 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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) [2021-10-03 12:28:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:26,308 INFO L93 Difference]: Finished difference Result 8306 states and 37194 transitions. [2021-10-03 12:28:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:28:26,309 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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 34 [2021-10-03 12:28:26,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:26,343 INFO L225 Difference]: With dead ends: 8306 [2021-10-03 12:28:26,343 INFO L226 Difference]: Without dead ends: 8289 [2021-10-03 12:28:26,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 4089.7ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-10-03 12:28:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-10-03 12:28:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 6445. [2021-10-03 12:28:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6445 states, 6444 states have (on average 4.599162011173185) internal successors, (29637), 6444 states have internal predecessors, (29637), 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) [2021-10-03 12:28:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6445 states to 6445 states and 29637 transitions. [2021-10-03 12:28:26,557 INFO L78 Accepts]: Start accepts. Automaton has 6445 states and 29637 transitions. Word has length 34 [2021-10-03 12:28:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:26,557 INFO L470 AbstractCegarLoop]: Abstraction has 6445 states and 29637 transitions. [2021-10-03 12:28:26,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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) [2021-10-03 12:28:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 6445 states and 29637 transitions. [2021-10-03 12:28:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:28:26,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:26,575 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:26,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-03 12:28:26,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-03 12:28:26,776 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:26,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1434569752, now seen corresponding path program 25 times [2021-10-03 12:28:26,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:26,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786980967] [2021-10-03 12:28:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:26,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:28,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:28,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786980967] [2021-10-03 12:28:28,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786980967] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:28,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117108045] [2021-10-03 12:28:28,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:28:28,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:28,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:28,605 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:28:28,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-03 12:28:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-03 12:28:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:28:30,982 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:28:30,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-03 12:28:31,376 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:28:31,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:28:31,635 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:28:31,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2021-10-03 12:28:34,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:28:34,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2021-10-03 12:28:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:28:34,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117108045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:34,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:28:34,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-10-03 12:28:34,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607984958] [2021-10-03 12:28:34,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:28:34,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:28:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:28:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=478, Unknown=2, NotChecked=0, Total=552 [2021-10-03 12:28:34,501 INFO L87 Difference]: Start difference. First operand 6445 states and 29637 transitions. Second operand has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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) [2021-10-03 12:28:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:38,778 INFO L93 Difference]: Finished difference Result 8695 states and 38773 transitions. [2021-10-03 12:28:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:28:38,779 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 34 [2021-10-03 12:28:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:38,817 INFO L225 Difference]: With dead ends: 8695 [2021-10-03 12:28:38,817 INFO L226 Difference]: Without dead ends: 8678 [2021-10-03 12:28:38,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 6205.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1158, Unknown=3, NotChecked=0, Total=1332 [2021-10-03 12:28:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8678 states. [2021-10-03 12:28:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8678 to 6221. [2021-10-03 12:28:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 4.62475884244373) internal successors, (28766), 6220 states have internal predecessors, (28766), 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) [2021-10-03 12:28:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 28766 transitions. [2021-10-03 12:28:38,986 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 28766 transitions. Word has length 34 [2021-10-03 12:28:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:38,986 INFO L470 AbstractCegarLoop]: Abstraction has 6221 states and 28766 transitions. [2021-10-03 12:28:38,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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) [2021-10-03 12:28:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 28766 transitions. [2021-10-03 12:28:39,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:28:39,000 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:39,000 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:39,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-03 12:28:39,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:39,202 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash -729050204, now seen corresponding path program 26 times [2021-10-03 12:28:39,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:39,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811980077] [2021-10-03 12:28:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:39,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:40,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:40,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811980077] [2021-10-03 12:28:40,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811980077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:40,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838751560] [2021-10-03 12:28:40,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:28:40,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:40,881 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:28:40,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-03 12:28:42,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:28:42,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:28:42,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-03 12:28:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:28:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:28:42,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-10-03 12:28:43,038 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:28:43,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-03 12:28:43,214 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:28:43,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-03 12:28:43,321 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:28:43,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-03 12:28:43,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:28:43,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2021-10-03 12:28:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:28:43,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838751560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:43,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:28:43,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-03 12:28:43,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344142116] [2021-10-03 12:28:43,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:28:43,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:28:43,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:28:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:28:43,720 INFO L87 Difference]: Start difference. First operand 6221 states and 28766 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 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) [2021-10-03 12:28:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:46,208 INFO L93 Difference]: Finished difference Result 9314 states and 41469 transitions. [2021-10-03 12:28:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-03 12:28:46,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 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 34 [2021-10-03 12:28:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:46,242 INFO L225 Difference]: With dead ends: 9314 [2021-10-03 12:28:46,242 INFO L226 Difference]: Without dead ends: 9297 [2021-10-03 12:28:46,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2138.0ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-10-03 12:28:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9297 states. [2021-10-03 12:28:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9297 to 6269. [2021-10-03 12:28:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6269 states, 6268 states have (on average 4.62093171665603) internal successors, (28964), 6268 states have internal predecessors, (28964), 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) [2021-10-03 12:28:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 28964 transitions. [2021-10-03 12:28:46,541 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 28964 transitions. Word has length 34 [2021-10-03 12:28:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:46,542 INFO L470 AbstractCegarLoop]: Abstraction has 6269 states and 28964 transitions. [2021-10-03 12:28:46,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 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) [2021-10-03 12:28:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 28964 transitions. [2021-10-03 12:28:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:28:46,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:46,556 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:46,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-03 12:28:46,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-03 12:28:46,757 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:46,760 INFO L82 PathProgramCache]: Analyzing trace with hash -432677724, now seen corresponding path program 27 times [2021-10-03 12:28:46,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:46,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304682409] [2021-10-03 12:28:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:46,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:48,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:48,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304682409] [2021-10-03 12:28:48,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304682409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:48,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450212463] [2021-10-03 12:28:48,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:28:48,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:48,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:48,475 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:28:48,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-03 12:28:50,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:28:50,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:28:50,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-03 12:28:50,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:28:50,746 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:28:50,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-03 12:28:50,929 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:28:50,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-03 12:28:51,204 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:28:51,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 48 [2021-10-03 12:28:51,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:28:51,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-10-03 12:28:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:28:51,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450212463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:51,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:28:51,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-10-03 12:28:51,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382105627] [2021-10-03 12:28:51,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:28:51,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:28:51,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:28:51,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:28:51,400 INFO L87 Difference]: Start difference. First operand 6269 states and 28964 transitions. Second operand has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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) [2021-10-03 12:28:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:53,776 INFO L93 Difference]: Finished difference Result 8409 states and 37684 transitions. [2021-10-03 12:28:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 12:28:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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 34 [2021-10-03 12:28:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:53,806 INFO L225 Difference]: With dead ends: 8409 [2021-10-03 12:28:53,807 INFO L226 Difference]: Without dead ends: 8392 [2021-10-03 12:28:53,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2442.6ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:28:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8392 states. [2021-10-03 12:28:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8392 to 6280. [2021-10-03 12:28:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6280 states, 6279 states have (on average 4.619684663162924) internal successors, (29007), 6279 states have internal predecessors, (29007), 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) [2021-10-03 12:28:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6280 states to 6280 states and 29007 transitions. [2021-10-03 12:28:53,977 INFO L78 Accepts]: Start accepts. Automaton has 6280 states and 29007 transitions. Word has length 34 [2021-10-03 12:28:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:53,977 INFO L470 AbstractCegarLoop]: Abstraction has 6280 states and 29007 transitions. [2021-10-03 12:28:53,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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) [2021-10-03 12:28:53,978 INFO L276 IsEmpty]: Start isEmpty. Operand 6280 states and 29007 transitions. [2021-10-03 12:28:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:28:53,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:53,992 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:54,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-03 12:28:54,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-03 12:28:54,201 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -483123378, now seen corresponding path program 28 times [2021-10-03 12:28:54,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:54,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306860705] [2021-10-03 12:28:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:54,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:56,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:56,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306860705] [2021-10-03 12:28:56,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306860705] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:56,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37400677] [2021-10-03 12:28:56,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:28:56,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:56,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:56,738 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:28:56,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-03 12:28:58,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:28:58,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:28:58,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-03 12:28:58,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:28:58,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2021-10-03 12:28:58,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:28:59,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-03 12:28:59,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-03 12:28:59,707 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-03 12:28:59,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:28:59,866 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-03 12:28:59,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:29:00,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:29:00,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 79 [2021-10-03 12:29:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:29:00,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37400677] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:00,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:00,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2021-10-03 12:29:00,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424713716] [2021-10-03 12:29:00,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:29:00,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:29:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:29:00,417 INFO L87 Difference]: Start difference. First operand 6280 states and 29007 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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) [2021-10-03 12:29:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:08,177 INFO L93 Difference]: Finished difference Result 9932 states and 43997 transitions. [2021-10-03 12:29:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-03 12:29:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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 34 [2021-10-03 12:29:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:08,211 INFO L225 Difference]: With dead ends: 9932 [2021-10-03 12:29:08,211 INFO L226 Difference]: Without dead ends: 9898 [2021-10-03 12:29:08,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 5087.7ms TimeCoverageRelationStatistics Valid=322, Invalid=2030, Unknown=0, NotChecked=0, Total=2352 [2021-10-03 12:29:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9898 states. [2021-10-03 12:29:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9898 to 6618. [2021-10-03 12:29:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6618 states, 6617 states have (on average 4.594982620522895) internal successors, (30405), 6617 states have internal predecessors, (30405), 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) [2021-10-03 12:29:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6618 states to 6618 states and 30405 transitions. [2021-10-03 12:29:08,397 INFO L78 Accepts]: Start accepts. Automaton has 6618 states and 30405 transitions. Word has length 34 [2021-10-03 12:29:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:08,398 INFO L470 AbstractCegarLoop]: Abstraction has 6618 states and 30405 transitions. [2021-10-03 12:29:08,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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) [2021-10-03 12:29:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6618 states and 30405 transitions. [2021-10-03 12:29:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:29:08,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:08,412 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:08,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-03 12:29:08,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-03 12:29:08,614 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:08,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1950068436, now seen corresponding path program 29 times [2021-10-03 12:29:08,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:08,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648347543] [2021-10-03 12:29:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:08,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:10,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:10,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648347543] [2021-10-03 12:29:10,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648347543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:10,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958509649] [2021-10-03 12:29:10,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:29:10,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:10,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:10,344 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:29:10,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-03 12:29:12,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:29:12,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-03 12:29:12,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,313 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-03 12:29:12,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 68 [2021-10-03 12:29:12,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:29:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:12,747 INFO L354 Elim1Store]: treesize reduction 64, result has 43.4 percent of original size [2021-10-03 12:29:12,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 86 [2021-10-03 12:29:12,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:29:13,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:29:13,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:29:13,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:29:13,646 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-03 12:29:13,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-03 12:29:13,771 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-03 12:29:13,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-03 12:29:14,247 INFO L354 Elim1Store]: treesize reduction 45, result has 23.7 percent of original size [2021-10-03 12:29:14,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 49 [2021-10-03 12:29:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:14,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958509649] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:14,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:14,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-10-03 12:29:14,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378478580] [2021-10-03 12:29:14,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-03 12:29:14,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-03 12:29:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:29:14,423 INFO L87 Difference]: Start difference. First operand 6618 states and 30405 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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) [2021-10-03 12:29:20,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:20,949 INFO L93 Difference]: Finished difference Result 12840 states and 56274 transitions. [2021-10-03 12:29:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:29:20,950 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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 34 [2021-10-03 12:29:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:21,001 INFO L225 Difference]: With dead ends: 12840 [2021-10-03 12:29:21,001 INFO L226 Difference]: Without dead ends: 12806 [2021-10-03 12:29:21,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 5263.7ms TimeCoverageRelationStatistics Valid=315, Invalid=2441, Unknown=0, NotChecked=0, Total=2756 [2021-10-03 12:29:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12806 states. [2021-10-03 12:29:21,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12806 to 6621. [2021-10-03 12:29:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6621 states, 6620 states have (on average 4.594712990936556) internal successors, (30417), 6620 states have internal predecessors, (30417), 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) [2021-10-03 12:29:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6621 states to 6621 states and 30417 transitions. [2021-10-03 12:29:21,249 INFO L78 Accepts]: Start accepts. Automaton has 6621 states and 30417 transitions. Word has length 34 [2021-10-03 12:29:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:21,249 INFO L470 AbstractCegarLoop]: Abstraction has 6621 states and 30417 transitions. [2021-10-03 12:29:21,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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) [2021-10-03 12:29:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 6621 states and 30417 transitions. [2021-10-03 12:29:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:29:21,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:21,264 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:21,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-03 12:29:21,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-03 12:29:21,466 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:21,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:21,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1795892944, now seen corresponding path program 30 times [2021-10-03 12:29:21,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:21,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791295183] [2021-10-03 12:29:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:21,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:22,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:22,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791295183] [2021-10-03 12:29:22,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791295183] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:22,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55634317] [2021-10-03 12:29:22,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:29:22,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:22,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:22,984 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:29:22,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-03 12:29:24,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:29:24,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:24,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-03 12:29:24,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:25,483 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:29:25,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:29:25,590 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:29:25,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:29:26,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:29:26,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2021-10-03 12:29:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:29:26,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55634317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:26,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:26,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-03 12:29:26,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303363378] [2021-10-03 12:29:26,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:29:26,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:29:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:29:26,264 INFO L87 Difference]: Start difference. First operand 6621 states and 30417 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:29,375 INFO L93 Difference]: Finished difference Result 13814 states and 61587 transitions. [2021-10-03 12:29:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-03 12:29:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 12:29:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:29,433 INFO L225 Difference]: With dead ends: 13814 [2021-10-03 12:29:29,433 INFO L226 Difference]: Without dead ends: 13780 [2021-10-03 12:29:29,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 3072.7ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-10-03 12:29:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13780 states. [2021-10-03 12:29:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13780 to 6660. [2021-10-03 12:29:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6660 states, 6659 states have (on average 4.592130950593182) internal successors, (30579), 6659 states have internal predecessors, (30579), 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) [2021-10-03 12:29:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6660 states to 6660 states and 30579 transitions. [2021-10-03 12:29:29,775 INFO L78 Accepts]: Start accepts. Automaton has 6660 states and 30579 transitions. Word has length 34 [2021-10-03 12:29:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:29,775 INFO L470 AbstractCegarLoop]: Abstraction has 6660 states and 30579 transitions. [2021-10-03 12:29:29,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 6660 states and 30579 transitions. [2021-10-03 12:29:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:29:29,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:29,797 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:29,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-03 12:29:30,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:30,004 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:30,005 INFO L82 PathProgramCache]: Analyzing trace with hash -939764900, now seen corresponding path program 31 times [2021-10-03 12:29:30,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:30,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853650203] [2021-10-03 12:29:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:30,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:32,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:32,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853650203] [2021-10-03 12:29:32,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853650203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:32,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958730582] [2021-10-03 12:29:32,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:29:32,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:32,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:32,019 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:29:32,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-03 12:29:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:33,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-03 12:29:33,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:33,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:33,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,106 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-03 12:29:34,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 59 [2021-10-03 12:29:34,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:29:34,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:34,638 INFO L354 Elim1Store]: treesize reduction 60, result has 42.9 percent of original size [2021-10-03 12:29:34,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 52 treesize of output 82 [2021-10-03 12:29:34,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:29:35,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:29:35,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 79 [2021-10-03 12:29:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-10-03 12:29:36,022 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:29:36,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 54 [2021-10-03 12:29:36,190 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:29:36,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-10-03 12:29:36,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:29:36,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2021-10-03 12:29:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:36,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958730582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:36,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:36,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-10-03 12:29:36,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944179082] [2021-10-03 12:29:36,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:29:36,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:36,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:29:36,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:29:36,575 INFO L87 Difference]: Start difference. First operand 6660 states and 30579 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:39,883 INFO L93 Difference]: Finished difference Result 9681 states and 43316 transitions. [2021-10-03 12:29:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-03 12:29:39,884 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 12:29:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:39,919 INFO L225 Difference]: With dead ends: 9681 [2021-10-03 12:29:39,919 INFO L226 Difference]: Without dead ends: 9664 [2021-10-03 12:29:39,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 3464.1ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:29:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2021-10-03 12:29:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 6680. [2021-10-03 12:29:40,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6680 states, 6679 states have (on average 4.591256176074262) internal successors, (30665), 6679 states have internal predecessors, (30665), 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) [2021-10-03 12:29:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6680 states to 6680 states and 30665 transitions. [2021-10-03 12:29:40,117 INFO L78 Accepts]: Start accepts. Automaton has 6680 states and 30665 transitions. Word has length 34 [2021-10-03 12:29:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:40,117 INFO L470 AbstractCegarLoop]: Abstraction has 6680 states and 30665 transitions. [2021-10-03 12:29:40,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6680 states and 30665 transitions. [2021-10-03 12:29:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:29:40,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:40,135 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:40,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-03 12:29:40,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-03 12:29:40,342 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:40,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:40,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1999823956, now seen corresponding path program 32 times [2021-10-03 12:29:40,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:40,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598894427] [2021-10-03 12:29:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:40,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:42,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:42,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598894427] [2021-10-03 12:29:42,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598894427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:42,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823466523] [2021-10-03 12:29:42,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:29:42,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:42,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:42,068 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:29:42,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-03 12:29:44,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:29:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-03 12:29:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:44,754 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:29:44,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:29:44,873 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:29:44,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:29:45,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:29:45,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-10-03 12:29:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:29:45,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823466523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:45,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:45,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-10-03 12:29:45,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270631426] [2021-10-03 12:29:45,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-03 12:29:45,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:45,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-03 12:29:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-10-03 12:29:45,362 INFO L87 Difference]: Start difference. First operand 6680 states and 30665 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 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) [2021-10-03 12:29:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:47,737 INFO L93 Difference]: Finished difference Result 10269 states and 45829 transitions. [2021-10-03 12:29:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:29:47,737 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 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 34 [2021-10-03 12:29:47,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:47,770 INFO L225 Difference]: With dead ends: 10269 [2021-10-03 12:29:47,770 INFO L226 Difference]: Without dead ends: 10252 [2021-10-03 12:29:47,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2189.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:29:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10252 states. [2021-10-03 12:29:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10252 to 6668. [2021-10-03 12:29:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6668 states, 6667 states have (on average 4.593220338983051) internal successors, (30623), 6667 states have internal predecessors, (30623), 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) [2021-10-03 12:29:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6668 states to 6668 states and 30623 transitions. [2021-10-03 12:29:47,966 INFO L78 Accepts]: Start accepts. Automaton has 6668 states and 30623 transitions. Word has length 34 [2021-10-03 12:29:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:47,967 INFO L470 AbstractCegarLoop]: Abstraction has 6668 states and 30623 transitions. [2021-10-03 12:29:47,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 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) [2021-10-03 12:29:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6668 states and 30623 transitions. [2021-10-03 12:29:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:29:47,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:47,983 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:48,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-03 12:29:48,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:48,185 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash -398210232, now seen corresponding path program 33 times [2021-10-03 12:29:48,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:48,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975861215] [2021-10-03 12:29:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:48,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:49,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:49,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975861215] [2021-10-03 12:29:49,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975861215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:49,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65378] [2021-10-03 12:29:49,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:29:49,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:49,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:49,616 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:29:49,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-03 12:29:51,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:29:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:51,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-03 12:29:51,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:51,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:51,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:51,847 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-03 12:29:51,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-10-03 12:29:52,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:29:52,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:52,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:52,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:52,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:52,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:52,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:52,313 INFO L354 Elim1Store]: treesize reduction 60, result has 42.9 percent of original size [2021-10-03 12:29:52,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 52 treesize of output 82 [2021-10-03 12:29:52,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:29:52,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:29:52,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:29:52,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:29:53,321 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:29:53,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-03 12:29:53,727 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:29:53,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 58 [2021-10-03 12:29:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:54,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:54,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:54,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-10-03 12:29:54,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621995648] [2021-10-03 12:29:54,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:29:54,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:54,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:29:54,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:29:54,054 INFO L87 Difference]: Start difference. First operand 6668 states and 30623 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:00,371 INFO L93 Difference]: Finished difference Result 11473 states and 51064 transitions. [2021-10-03 12:30:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:30:00,371 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 12:30:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:00,414 INFO L225 Difference]: With dead ends: 11473 [2021-10-03 12:30:00,414 INFO L226 Difference]: Without dead ends: 11456 [2021-10-03 12:30:00,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3536.5ms TimeCoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-10-03 12:30:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11456 states. [2021-10-03 12:30:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11456 to 6674. [2021-10-03 12:30:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6674 states, 6673 states have (on average 4.59268694739997) internal successors, (30647), 6673 states have internal predecessors, (30647), 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) [2021-10-03 12:30:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6674 states to 6674 states and 30647 transitions. [2021-10-03 12:30:00,624 INFO L78 Accepts]: Start accepts. Automaton has 6674 states and 30647 transitions. Word has length 34 [2021-10-03 12:30:00,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:00,624 INFO L470 AbstractCegarLoop]: Abstraction has 6674 states and 30647 transitions. [2021-10-03 12:30:00,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:00,624 INFO L276 IsEmpty]: Start isEmpty. Operand 6674 states and 30647 transitions. [2021-10-03 12:30:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:30:00,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:00,639 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:00,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-03 12:30:00,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-03 12:30:00,840 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1155179216, now seen corresponding path program 34 times [2021-10-03 12:30:00,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:00,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313870225] [2021-10-03 12:30:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:00,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:30:03,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:03,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313870225] [2021-10-03 12:30:03,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313870225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:03,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660035274] [2021-10-03 12:30:03,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:30:03,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:03,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:03,344 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:30:03,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-03 12:30:05,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:30:05,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:30:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-03 12:30:05,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:05,609 INFO L354 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2021-10-03 12:30:05,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 113 [2021-10-03 12:30:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:05,956 INFO L354 Elim1Store]: treesize reduction 72, result has 44.2 percent of original size [2021-10-03 12:30:05,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 52 treesize of output 94 [2021-10-03 12:30:06,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:30:06,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-03 12:30:06,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-03 12:30:07,036 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-03 12:30:07,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-03 12:30:07,354 INFO L354 Elim1Store]: treesize reduction 75, result has 24.2 percent of original size [2021-10-03 12:30:07,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2021-10-03 12:30:07,717 INFO L354 Elim1Store]: treesize reduction 45, result has 23.7 percent of original size [2021-10-03 12:30:07,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 37 [2021-10-03 12:30:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:07,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660035274] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:07,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:07,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-10-03 12:30:07,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495985337] [2021-10-03 12:30:07,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:30:07,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:30:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:30:07,904 INFO L87 Difference]: Start difference. First operand 6674 states and 30647 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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) [2021-10-03 12:30:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:14,441 INFO L93 Difference]: Finished difference Result 11744 states and 52777 transitions. [2021-10-03 12:30:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-03 12:30:14,442 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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 34 [2021-10-03 12:30:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:14,488 INFO L225 Difference]: With dead ends: 11744 [2021-10-03 12:30:14,488 INFO L226 Difference]: Without dead ends: 11705 [2021-10-03 12:30:14,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 5861.3ms TimeCoverageRelationStatistics Valid=429, Invalid=2993, Unknown=0, NotChecked=0, Total=3422 [2021-10-03 12:30:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11705 states. [2021-10-03 12:30:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11705 to 6683. [2021-10-03 12:30:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6683 states, 6682 states have (on average 4.591290032924274) internal successors, (30679), 6682 states have internal predecessors, (30679), 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) [2021-10-03 12:30:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6683 states to 6683 states and 30679 transitions. [2021-10-03 12:30:14,713 INFO L78 Accepts]: Start accepts. Automaton has 6683 states and 30679 transitions. Word has length 34 [2021-10-03 12:30:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:14,713 INFO L470 AbstractCegarLoop]: Abstraction has 6683 states and 30679 transitions. [2021-10-03 12:30:14,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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) [2021-10-03 12:30:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 6683 states and 30679 transitions. [2021-10-03 12:30:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:30:14,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:14,729 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:14,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-03 12:30:14,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:14,931 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2005279944, now seen corresponding path program 35 times [2021-10-03 12:30:14,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:14,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861528651] [2021-10-03 12:30:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:14,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:30:16,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:16,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861528651] [2021-10-03 12:30:16,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861528651] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:16,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883307918] [2021-10-03 12:30:16,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:30:16,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:16,557 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:30:16,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-03 12:30:18,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:30:18,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:30:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-03 12:30:18,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:19,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:30:19,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:30:19,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:30:19,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:30:19,702 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-10-03 12:30:19,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 44 [2021-10-03 12:30:19,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:30:19,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-10-03 12:30:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:30:20,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883307918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:20,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:20,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 27 [2021-10-03 12:30:20,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843184366] [2021-10-03 12:30:20,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:30:20,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:30:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:30:20,119 INFO L87 Difference]: Start difference. First operand 6683 states and 30679 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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) [2021-10-03 12:30:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:25,313 INFO L93 Difference]: Finished difference Result 12057 states and 52810 transitions. [2021-10-03 12:30:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-03 12:30:25,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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 34 [2021-10-03 12:30:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:25,357 INFO L225 Difference]: With dead ends: 12057 [2021-10-03 12:30:25,357 INFO L226 Difference]: Without dead ends: 12040 [2021-10-03 12:30:25,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 4339.6ms TimeCoverageRelationStatistics Valid=360, Invalid=3300, Unknown=0, NotChecked=0, Total=3660 [2021-10-03 12:30:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12040 states. [2021-10-03 12:30:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12040 to 6686. [2021-10-03 12:30:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6686 states, 6685 states have (on average 4.591323859386686) internal successors, (30693), 6685 states have internal predecessors, (30693), 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) [2021-10-03 12:30:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6686 states to 6686 states and 30693 transitions. [2021-10-03 12:30:25,579 INFO L78 Accepts]: Start accepts. Automaton has 6686 states and 30693 transitions. Word has length 34 [2021-10-03 12:30:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:25,579 INFO L470 AbstractCegarLoop]: Abstraction has 6686 states and 30693 transitions. [2021-10-03 12:30:25,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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) [2021-10-03 12:30:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6686 states and 30693 transitions. [2021-10-03 12:30:25,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:30:25,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:25,594 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:25,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-03 12:30:25,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:25,795 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:25,796 INFO L82 PathProgramCache]: Analyzing trace with hash 607341230, now seen corresponding path program 36 times [2021-10-03 12:30:25,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:25,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692676140] [2021-10-03 12:30:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:25,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:30:27,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:27,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692676140] [2021-10-03 12:30:27,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692676140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:27,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269816995] [2021-10-03 12:30:27,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:30:27,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:27,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:27,339 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:30:27,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-03 12:30:29,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:30:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:30:29,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-03 12:30:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:29,691 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-03 12:30:29,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-10-03 12:30:29,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:30:30,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:30,165 INFO L354 Elim1Store]: treesize reduction 76, result has 44.5 percent of original size [2021-10-03 12:30:30,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 52 treesize of output 98 [2021-10-03 12:30:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:30:30,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-03 12:30:30,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:30:30,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:30:30,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:30:31,004 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:30:31,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-03 12:30:31,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:30:31,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2021-10-03 12:30:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:30:31,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269816995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:31,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:31,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-10-03 12:30:31,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215853305] [2021-10-03 12:30:31,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:30:31,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:31,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:30:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:30:31,426 INFO L87 Difference]: Start difference. First operand 6686 states and 30693 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:39,028 INFO L93 Difference]: Finished difference Result 11867 states and 51815 transitions. [2021-10-03 12:30:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-03 12:30:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 12:30:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:39,068 INFO L225 Difference]: With dead ends: 11867 [2021-10-03 12:30:39,068 INFO L226 Difference]: Without dead ends: 11850 [2021-10-03 12:30:39,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 4921.6ms TimeCoverageRelationStatistics Valid=323, Invalid=2329, Unknown=0, NotChecked=0, Total=2652 [2021-10-03 12:30:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11850 states. [2021-10-03 12:30:39,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11850 to 6681. [2021-10-03 12:30:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6681 states, 6680 states have (on average 4.591766467065868) internal successors, (30673), 6680 states have internal predecessors, (30673), 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) [2021-10-03 12:30:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6681 states to 6681 states and 30673 transitions. [2021-10-03 12:30:39,276 INFO L78 Accepts]: Start accepts. Automaton has 6681 states and 30673 transitions. Word has length 34 [2021-10-03 12:30:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:39,277 INFO L470 AbstractCegarLoop]: Abstraction has 6681 states and 30673 transitions. [2021-10-03 12:30:39,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6681 states and 30673 transitions. [2021-10-03 12:30:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:30:39,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:39,294 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:39,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-03 12:30:39,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-03 12:30:39,495 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:39,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:39,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1127890299, now seen corresponding path program 37 times [2021-10-03 12:30:39,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:39,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111009627] [2021-10-03 12:30:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:39,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:30:41,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:41,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111009627] [2021-10-03 12:30:41,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111009627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:41,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613613741] [2021-10-03 12:30:41,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:30:41,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:41,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:41,877 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:30:41,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-03 12:30:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:44,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-03 12:30:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:44,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:44,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:44,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:44,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-10-03 12:30:44,918 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:30:44,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-03 12:30:45,457 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:30:45,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:30:45,774 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:30:45,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 48 [2021-10-03 12:30:45,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:30:45,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2021-10-03 12:30:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:46,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613613741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:46,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:46,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-10-03 12:30:46,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330851219] [2021-10-03 12:30:46,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-03 12:30:46,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:46,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-03 12:30:46,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:30:46,097 INFO L87 Difference]: Start difference. First operand 6681 states and 30673 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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) [2021-10-03 12:30:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:49,622 INFO L93 Difference]: Finished difference Result 10068 states and 44597 transitions. [2021-10-03 12:30:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-03 12:30:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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 34 [2021-10-03 12:30:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:49,658 INFO L225 Difference]: With dead ends: 10068 [2021-10-03 12:30:49,659 INFO L226 Difference]: Without dead ends: 10051 [2021-10-03 12:30:49,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 3577.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-10-03 12:30:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10051 states. [2021-10-03 12:30:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10051 to 6627. [2021-10-03 12:30:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 6626 states have (on average 4.602022336251132) internal successors, (30493), 6626 states have internal predecessors, (30493), 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) [2021-10-03 12:30:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 30493 transitions. [2021-10-03 12:30:49,855 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 30493 transitions. Word has length 34 [2021-10-03 12:30:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:49,855 INFO L470 AbstractCegarLoop]: Abstraction has 6627 states and 30493 transitions. [2021-10-03 12:30:49,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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) [2021-10-03 12:30:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 30493 transitions. [2021-10-03 12:30:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:30:49,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:49,871 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:49,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-03 12:30:50,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-03 12:30:50,072 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1532044707, now seen corresponding path program 38 times [2021-10-03 12:30:50,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:50,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336887592] [2021-10-03 12:30:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:50,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:30:51,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:51,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336887592] [2021-10-03 12:30:51,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336887592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:51,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811491239] [2021-10-03 12:30:51,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:30:51,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:51,760 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:30:51,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-03 12:30:54,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:30:54,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:30:54,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-03 12:30:54,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:54,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 142 [2021-10-03 12:30:55,085 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:30:55,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-10-03 12:30:55,222 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:30:55,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-10-03 12:30:55,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:30:55,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-10-03 12:30:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:55,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811491239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:55,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:55,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-03 12:30:55,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363097921] [2021-10-03 12:30:55,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:30:55,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:55,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:30:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:30:55,547 INFO L87 Difference]: Start difference. First operand 6627 states and 30493 transitions. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2021-10-03 12:30:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:58,061 INFO L93 Difference]: Finished difference Result 9228 states and 41416 transitions. [2021-10-03 12:30:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:30:58,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 34 [2021-10-03 12:30:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:58,094 INFO L225 Difference]: With dead ends: 9228 [2021-10-03 12:30:58,094 INFO L226 Difference]: Without dead ends: 9211 [2021-10-03 12:30:58,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2386.2ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:30:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2021-10-03 12:30:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 6831. [2021-10-03 12:30:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6831 states, 6830 states have (on average 4.596339677891654) internal successors, (31393), 6830 states have internal predecessors, (31393), 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) [2021-10-03 12:30:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6831 states to 6831 states and 31393 transitions. [2021-10-03 12:30:58,281 INFO L78 Accepts]: Start accepts. Automaton has 6831 states and 31393 transitions. Word has length 34 [2021-10-03 12:30:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:58,281 INFO L470 AbstractCegarLoop]: Abstraction has 6831 states and 31393 transitions. [2021-10-03 12:30:58,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2021-10-03 12:30:58,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6831 states and 31393 transitions. [2021-10-03 12:30:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:30:58,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:58,298 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:58,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-03 12:30:58,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-03 12:30:58,499 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:58,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1622695151, now seen corresponding path program 39 times [2021-10-03 12:30:58,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:58,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990646881] [2021-10-03 12:30:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:58,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:31:00,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:31:00,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990646881] [2021-10-03 12:31:00,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990646881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:00,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245968988] [2021-10-03 12:31:00,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:31:00,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:00,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:31:00,212 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:31:00,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-03 12:31:02,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:31:02,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:31:02,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-03 12:31:02,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:31:02,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:31:03,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:31:03,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-03 12:31:03,402 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:31:03,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:31:03,517 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:31:03,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-03 12:31:03,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:31:03,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2021-10-03 12:31:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:31:03,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245968988] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:03,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:31:03,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-10-03 12:31:03,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466412286] [2021-10-03 12:31:03,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:31:03,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:31:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:31:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:31:03,904 INFO L87 Difference]: Start difference. First operand 6831 states and 31393 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:31:09,846 INFO L93 Difference]: Finished difference Result 9814 states and 44184 transitions. [2021-10-03 12:31:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:31:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 12:31:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:31:09,881 INFO L225 Difference]: With dead ends: 9814 [2021-10-03 12:31:09,881 INFO L226 Difference]: Without dead ends: 9797 [2021-10-03 12:31:09,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 4142.6ms TimeCoverageRelationStatistics Valid=185, Invalid=1296, Unknown=1, NotChecked=0, Total=1482 [2021-10-03 12:31:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9797 states. [2021-10-03 12:31:10,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9797 to 6875. [2021-10-03 12:31:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6875 states, 6874 states have (on average 4.5963049170788475) internal successors, (31595), 6874 states have internal predecessors, (31595), 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) [2021-10-03 12:31:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6875 states to 6875 states and 31595 transitions. [2021-10-03 12:31:10,063 INFO L78 Accepts]: Start accepts. Automaton has 6875 states and 31595 transitions. Word has length 34 [2021-10-03 12:31:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:31:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 6875 states and 31595 transitions. [2021-10-03 12:31:10,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6875 states and 31595 transitions. [2021-10-03 12:31:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:31:10,079 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:31:10,079 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:31:10,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-03 12:31:10,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:10,281 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:31:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:31:10,282 INFO L82 PathProgramCache]: Analyzing trace with hash 562636095, now seen corresponding path program 40 times [2021-10-03 12:31:10,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:31:10,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747603038] [2021-10-03 12:31:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:31:10,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:31:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:31:14,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:31:14,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747603038] [2021-10-03 12:31:14,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747603038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:14,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133799818] [2021-10-03 12:31:14,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:31:14,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:14,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:31:14,039 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:31:14,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-03 12:31:16,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:31:16,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:31:16,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-03 12:31:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:31:17,321 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-03 12:31:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-03 12:31:17,467 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-03 12:31:17,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-03 12:31:17,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:31:17,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 77 [2021-10-03 12:31:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:31:18,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133799818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:18,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:31:18,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-10-03 12:31:18,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803121986] [2021-10-03 12:31:18,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:31:18,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:31:18,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:31:18,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:31:18,199 INFO L87 Difference]: Start difference. First operand 6875 states and 31595 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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) [2021-10-03 12:31:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:31:31,076 INFO L93 Difference]: Finished difference Result 14138 states and 62005 transitions. [2021-10-03 12:31:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-03 12:31:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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 34 [2021-10-03 12:31:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:31:31,132 INFO L225 Difference]: With dead ends: 14138 [2021-10-03 12:31:31,133 INFO L226 Difference]: Without dead ends: 14087 [2021-10-03 12:31:31,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 8958.6ms TimeCoverageRelationStatistics Valid=392, Invalid=2799, Unknown=1, NotChecked=0, Total=3192 [2021-10-03 12:31:31,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14087 states. [2021-10-03 12:31:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14087 to 7288. [2021-10-03 12:31:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7288 states, 7287 states have (on average 4.61053931659119) internal successors, (33597), 7287 states have internal predecessors, (33597), 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) [2021-10-03 12:31:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7288 states to 7288 states and 33597 transitions. [2021-10-03 12:31:31,399 INFO L78 Accepts]: Start accepts. Automaton has 7288 states and 33597 transitions. Word has length 34 [2021-10-03 12:31:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:31:31,400 INFO L470 AbstractCegarLoop]: Abstraction has 7288 states and 33597 transitions. [2021-10-03 12:31:31,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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) [2021-10-03 12:31:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 7288 states and 33597 transitions. [2021-10-03 12:31:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:31:31,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:31:31,419 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:31:31,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-03 12:31:31,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:31,620 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:31:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:31:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash -692524875, now seen corresponding path program 41 times [2021-10-03 12:31:31,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:31:31,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983017160] [2021-10-03 12:31:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:31:31,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:31:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:31:33,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:31:33,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983017160] [2021-10-03 12:31:33,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983017160] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:33,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772059711] [2021-10-03 12:31:33,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:31:33,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:33,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:31:33,655 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:31:33,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-03 12:31:36,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:31:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:31:36,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-03 12:31:36,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:31:36,464 INFO L354 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2021-10-03 12:31:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 672 treesize of output 665 [2021-10-03 12:31:38,125 INFO L354 Elim1Store]: treesize reduction 92, result has 39.9 percent of original size [2021-10-03 12:31:38,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 106 [2021-10-03 12:31:39,087 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:31:39,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-10-03 12:31:39,530 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-03 12:31:39,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 57 [2021-10-03 12:31:40,007 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-03 12:31:40,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 43 [2021-10-03 12:31:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:31:40,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772059711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:40,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:31:40,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-10-03 12:31:40,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007335407] [2021-10-03 12:31:40,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:31:40,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:31:40,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:31:40,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:31:40,186 INFO L87 Difference]: Start difference. First operand 7288 states and 33597 transitions. Second operand has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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) [2021-10-03 12:31:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:31:44,615 INFO L93 Difference]: Finished difference Result 10776 states and 47806 transitions. [2021-10-03 12:31:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:31:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 34 [2021-10-03 12:31:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:31:44,654 INFO L225 Difference]: With dead ends: 10776 [2021-10-03 12:31:44,654 INFO L226 Difference]: Without dead ends: 10759 [2021-10-03 12:31:44,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 3935.9ms TimeCoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:31:44,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10759 states. [2021-10-03 12:31:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10759 to 6538. [2021-10-03 12:31:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6538 states, 6537 states have (on average 4.544439345265412) internal successors, (29707), 6537 states have internal predecessors, (29707), 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) [2021-10-03 12:31:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 29707 transitions. [2021-10-03 12:31:44,861 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 29707 transitions. Word has length 34 [2021-10-03 12:31:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:31:44,861 INFO L470 AbstractCegarLoop]: Abstraction has 6538 states and 29707 transitions. [2021-10-03 12:31:44,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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) [2021-10-03 12:31:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 29707 transitions. [2021-10-03 12:31:44,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:31:44,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:31:44,878 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:31:44,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-03 12:31:45,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:45,079 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:31:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:31:45,080 INFO L82 PathProgramCache]: Analyzing trace with hash -714275345, now seen corresponding path program 42 times [2021-10-03 12:31:45,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:31:45,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846346291] [2021-10-03 12:31:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:31:45,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:31:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:31:49,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:31:49,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846346291] [2021-10-03 12:31:49,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846346291] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:49,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752293627] [2021-10-03 12:31:49,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:31:49,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:49,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:31:49,280 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:31:49,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-03 12:31:51,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:31:51,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:31:51,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-03 12:31:51,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:31:51,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 101 [2021-10-03 12:31:52,991 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:31:52,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-03 12:31:53,245 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:31:53,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 47 [2021-10-03 12:31:53,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:31:53,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-10-03 12:31:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:31:53,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752293627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:53,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:31:53,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-03 12:31:53,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859890641] [2021-10-03 12:31:53,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:31:53,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:31:53,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:31:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:31:53,597 INFO L87 Difference]: Start difference. First operand 6538 states and 29707 transitions. Second operand has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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) [2021-10-03 12:31:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:31:57,540 INFO L93 Difference]: Finished difference Result 11759 states and 52622 transitions. [2021-10-03 12:31:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-03 12:31:57,540 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 34 [2021-10-03 12:31:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:31:57,584 INFO L225 Difference]: With dead ends: 11759 [2021-10-03 12:31:57,584 INFO L226 Difference]: Without dead ends: 11725 [2021-10-03 12:31:57,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 4548.9ms TimeCoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:31:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11725 states. [2021-10-03 12:31:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11725 to 6514. [2021-10-03 12:31:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6514 states, 6513 states have (on average 4.546445570397666) internal successors, (29611), 6513 states have internal predecessors, (29611), 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) [2021-10-03 12:31:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6514 states to 6514 states and 29611 transitions. [2021-10-03 12:31:57,806 INFO L78 Accepts]: Start accepts. Automaton has 6514 states and 29611 transitions. Word has length 34 [2021-10-03 12:31:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:31:57,806 INFO L470 AbstractCegarLoop]: Abstraction has 6514 states and 29611 transitions. [2021-10-03 12:31:57,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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) [2021-10-03 12:31:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 6514 states and 29611 transitions. [2021-10-03 12:31:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:31:57,821 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:31:57,821 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:31:57,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-03 12:31:58,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-03 12:31:58,023 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:31:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:31:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1998997247, now seen corresponding path program 43 times [2021-10-03 12:31:58,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:31:58,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315141169] [2021-10-03 12:31:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:31:58,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:31:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:32:00,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:32:00,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315141169] [2021-10-03 12:32:00,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315141169] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:00,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256867] [2021-10-03 12:32:00,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:32:00,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:32:00,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:32:00,236 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:32:00,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-03 12:32:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-03 12:32:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:32:03,129 INFO L354 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2021-10-03 12:32:03,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 92 [2021-10-03 12:32:07,212 INFO L354 Elim1Store]: treesize reduction 108, result has 36.1 percent of original size [2021-10-03 12:32:07,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 114 [2021-10-03 12:32:10,059 INFO L354 Elim1Store]: treesize reduction 80, result has 30.4 percent of original size [2021-10-03 12:32:10,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 54 [2021-10-03 12:32:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:32:10,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256867] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:10,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:32:10,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-10-03 12:32:10,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590278402] [2021-10-03 12:32:10,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:32:10,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:32:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:32:10,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=490, Unknown=1, NotChecked=0, Total=552 [2021-10-03 12:32:10,419 INFO L87 Difference]: Start difference. First operand 6514 states and 29611 transitions. Second operand has 24 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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) [2021-10-03 12:32:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:32:19,877 INFO L93 Difference]: Finished difference Result 13886 states and 60438 transitions. [2021-10-03 12:32:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-03 12:32:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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 34 [2021-10-03 12:32:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:32:19,928 INFO L225 Difference]: With dead ends: 13886 [2021-10-03 12:32:19,928 INFO L226 Difference]: Without dead ends: 13869 [2021-10-03 12:32:19,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 10323.0ms TimeCoverageRelationStatistics Valid=268, Invalid=2083, Unknown=1, NotChecked=0, Total=2352 [2021-10-03 12:32:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13869 states. [2021-10-03 12:32:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13869 to 6505. [2021-10-03 12:32:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 4.5473554735547355) internal successors, (29576), 6504 states have internal predecessors, (29576), 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) [2021-10-03 12:32:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 29576 transitions. [2021-10-03 12:32:20,155 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 29576 transitions. Word has length 34 [2021-10-03 12:32:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:32:20,156 INFO L470 AbstractCegarLoop]: Abstraction has 6505 states and 29576 transitions. [2021-10-03 12:32:20,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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) [2021-10-03 12:32:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 29576 transitions. [2021-10-03 12:32:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:32:20,171 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:32:20,171 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:32:20,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-03 12:32:20,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-03 12:32:20,372 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:32:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:32:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1419591259, now seen corresponding path program 44 times [2021-10-03 12:32:20,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:32:20,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247439947] [2021-10-03 12:32:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:32:20,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:32:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:32:22,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:32:22,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247439947] [2021-10-03 12:32:22,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247439947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:22,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81203406] [2021-10-03 12:32:22,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:32:22,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:32:22,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:32:22,879 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:32:22,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-03 12:32:25,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:32:25,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:32:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-03 12:32:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:32:25,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 219 [2021-10-03 12:32:26,349 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:32:26,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 47 [2021-10-03 12:32:26,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:32:26,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-03 12:32:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:32:26,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81203406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:26,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:32:26,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2021-10-03 12:32:26,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944487193] [2021-10-03 12:32:26,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:32:26,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:32:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:32:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:32:26,649 INFO L87 Difference]: Start difference. First operand 6505 states and 29576 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 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) [2021-10-03 12:32:38,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:32:38,706 INFO L93 Difference]: Finished difference Result 12274 states and 53617 transitions. [2021-10-03 12:32:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-03 12:32:38,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 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 34 [2021-10-03 12:32:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:32:38,751 INFO L225 Difference]: With dead ends: 12274 [2021-10-03 12:32:38,751 INFO L226 Difference]: Without dead ends: 12257 [2021-10-03 12:32:38,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 4237.9ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-10-03 12:32:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12257 states. [2021-10-03 12:32:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12257 to 6512. [2021-10-03 12:32:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 4.556750115189679) internal successors, (29669), 6511 states have internal predecessors, (29669), 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) [2021-10-03 12:32:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 29669 transitions. [2021-10-03 12:32:38,963 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 29669 transitions. Word has length 34 [2021-10-03 12:32:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:32:38,963 INFO L470 AbstractCegarLoop]: Abstraction has 6512 states and 29669 transitions. [2021-10-03 12:32:38,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 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) [2021-10-03 12:32:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 29669 transitions. [2021-10-03 12:32:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:32:38,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:32:38,979 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:32:39,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-03 12:32:39,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-03 12:32:39,180 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:32:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:32:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash 272772699, now seen corresponding path program 45 times [2021-10-03 12:32:39,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:32:39,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304290440] [2021-10-03 12:32:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:32:39,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:32:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:32:41,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:32:41,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304290440] [2021-10-03 12:32:41,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304290440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:41,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671775056] [2021-10-03 12:32:41,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:32:41,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:32:41,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:32:41,497 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:32:41,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-03 12:32:44,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:32:44,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:32:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-03 12:32:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:32:44,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-10-03 12:32:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:32:45,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671775056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:45,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:32:45,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-03 12:32:45,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377506693] [2021-10-03 12:32:45,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-03 12:32:45,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:32:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-03 12:32:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-03 12:32:45,298 INFO L87 Difference]: Start difference. First operand 6512 states and 29669 transitions. Second operand has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:32:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:32:47,353 INFO L93 Difference]: Finished difference Result 11395 states and 50059 transitions. [2021-10-03 12:32:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:32:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 12:32:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:32:47,393 INFO L225 Difference]: With dead ends: 11395 [2021-10-03 12:32:47,393 INFO L226 Difference]: Without dead ends: 11378 [2021-10-03 12:32:47,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2350.9ms TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2021-10-03 12:32:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11378 states. [2021-10-03 12:32:47,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11378 to 6391. [2021-10-03 12:32:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6391 states, 6390 states have (on average 4.547261345852895) internal successors, (29057), 6390 states have internal predecessors, (29057), 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) [2021-10-03 12:32:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 29057 transitions. [2021-10-03 12:32:47,592 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 29057 transitions. Word has length 34 [2021-10-03 12:32:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:32:47,593 INFO L470 AbstractCegarLoop]: Abstraction has 6391 states and 29057 transitions. [2021-10-03 12:32:47,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:32:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 29057 transitions. [2021-10-03 12:32:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:32:47,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:32:47,608 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:32:47,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-10-03 12:32:47,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-03 12:32:47,809 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:32:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:32:47,810 INFO L82 PathProgramCache]: Analyzing trace with hash 858842578, now seen corresponding path program 46 times [2021-10-03 12:32:47,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:32:47,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694648336] [2021-10-03 12:32:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:32:47,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:32:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:32:51,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:32:51,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694648336] [2021-10-03 12:32:51,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694648336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:51,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192230445] [2021-10-03 12:32:51,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:32:51,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:32:51,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:32:51,149 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:32:51,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-03 12:32:54,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:32:54,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:32:54,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-03 12:32:54,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:32:54,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 175 [2021-10-03 12:32:55,723 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-03 12:32:55,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:32:55,933 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-03 12:32:55,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:32:56,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:32:56,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 79 [2021-10-03 12:32:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:32:56,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192230445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:56,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:32:56,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 28 [2021-10-03 12:32:56,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131514974] [2021-10-03 12:32:56,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-03 12:32:56,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:32:56,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-03 12:32:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:32:56,835 INFO L87 Difference]: Start difference. First operand 6391 states and 29057 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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) [2021-10-03 12:33:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:09,025 INFO L93 Difference]: Finished difference Result 9685 states and 42606 transitions. [2021-10-03 12:33:09,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:33:09,025 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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 35 [2021-10-03 12:33:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:09,057 INFO L225 Difference]: With dead ends: 9685 [2021-10-03 12:33:09,057 INFO L226 Difference]: Without dead ends: 9651 [2021-10-03 12:33:09,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 6335.7ms TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-10-03 12:33:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9651 states. [2021-10-03 12:33:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9651 to 6411. [2021-10-03 12:33:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6411 states, 6410 states have (on average 4.542901716068643) internal successors, (29120), 6410 states have internal predecessors, (29120), 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) [2021-10-03 12:33:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6411 states to 6411 states and 29120 transitions. [2021-10-03 12:33:09,234 INFO L78 Accepts]: Start accepts. Automaton has 6411 states and 29120 transitions. Word has length 35 [2021-10-03 12:33:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:09,234 INFO L470 AbstractCegarLoop]: Abstraction has 6411 states and 29120 transitions. [2021-10-03 12:33:09,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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) [2021-10-03 12:33:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 6411 states and 29120 transitions. [2021-10-03 12:33:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:09,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:09,248 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:09,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-03 12:33:09,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:09,450 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:09,450 INFO L82 PathProgramCache]: Analyzing trace with hash 186786740, now seen corresponding path program 47 times [2021-10-03 12:33:09,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:09,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429274096] [2021-10-03 12:33:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:09,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:33:12,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:12,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429274096] [2021-10-03 12:33:12,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429274096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:12,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297914605] [2021-10-03 12:33:12,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:33:12,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:12,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:12,358 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:12,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-03 12:33:15,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:33:15,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:33:15,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-03 12:33:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:15,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:15,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:15,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:15,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:15,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:15,671 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-03 12:33:15,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 80 [2021-10-03 12:33:15,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:33:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:16,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:16,238 INFO L354 Elim1Store]: treesize reduction 64, result has 43.4 percent of original size [2021-10-03 12:33:16,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 86 [2021-10-03 12:33:16,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:33:16,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-03 12:33:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:33:16,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:33:17,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-03 12:33:17,517 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-03 12:33:17,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-03 12:33:17,811 INFO L354 Elim1Store]: treesize reduction 75, result has 24.2 percent of original size [2021-10-03 12:33:17,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2021-10-03 12:33:18,264 INFO L354 Elim1Store]: treesize reduction 45, result has 23.7 percent of original size [2021-10-03 12:33:18,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 49 [2021-10-03 12:33:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:33:18,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297914605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:18,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:18,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 28 [2021-10-03 12:33:18,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489383646] [2021-10-03 12:33:18,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-03 12:33:18,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-03 12:33:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:33:18,525 INFO L87 Difference]: Start difference. First operand 6411 states and 29120 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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) [2021-10-03 12:33:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:30,710 INFO L93 Difference]: Finished difference Result 16168 states and 71334 transitions. [2021-10-03 12:33:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-03 12:33:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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 35 [2021-10-03 12:33:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:30,774 INFO L225 Difference]: With dead ends: 16168 [2021-10-03 12:33:30,774 INFO L226 Difference]: Without dead ends: 16151 [2021-10-03 12:33:30,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 8725.3ms TimeCoverageRelationStatistics Valid=504, Invalid=3528, Unknown=0, NotChecked=0, Total=4032 [2021-10-03 12:33:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16151 states. [2021-10-03 12:33:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16151 to 6399. [2021-10-03 12:33:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6399 states, 6398 states have (on average 4.544857768052516) internal successors, (29078), 6398 states have internal predecessors, (29078), 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) [2021-10-03 12:33:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6399 states to 6399 states and 29078 transitions. [2021-10-03 12:33:31,027 INFO L78 Accepts]: Start accepts. Automaton has 6399 states and 29078 transitions. Word has length 35 [2021-10-03 12:33:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:31,027 INFO L470 AbstractCegarLoop]: Abstraction has 6399 states and 29078 transitions. [2021-10-03 12:33:31,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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) [2021-10-03 12:33:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 6399 states and 29078 transitions. [2021-10-03 12:33:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:31,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:31,043 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:31,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-03 12:33:31,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-03 12:33:31,245 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:31,246 INFO L82 PathProgramCache]: Analyzing trace with hash -947721396, now seen corresponding path program 48 times [2021-10-03 12:33:31,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:31,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511661928] [2021-10-03 12:33:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:31,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:33:34,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:34,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511661928] [2021-10-03 12:33:34,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511661928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:34,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879240936] [2021-10-03 12:33:34,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:33:34,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:34,037 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:34,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-03 12:33:37,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:33:37,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:33:37,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-03 12:33:37,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:37,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-10-03 12:33:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:33:37,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879240936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:37,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:37,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 20 [2021-10-03 12:33:37,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812666472] [2021-10-03 12:33:37,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-03 12:33:37,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:37,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-03 12:33:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-10-03 12:33:37,769 INFO L87 Difference]: Start difference. First operand 6399 states and 29078 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 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) [2021-10-03 12:33:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:40,651 INFO L93 Difference]: Finished difference Result 9003 states and 39800 transitions. [2021-10-03 12:33:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-03 12:33:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 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 35 [2021-10-03 12:33:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:40,682 INFO L225 Difference]: With dead ends: 9003 [2021-10-03 12:33:40,682 INFO L226 Difference]: Without dead ends: 8986 [2021-10-03 12:33:40,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 3097.4ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 12:33:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8986 states. [2021-10-03 12:33:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8986 to 6386. [2021-10-03 12:33:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6385 states have (on average 4.5475332811276425) internal successors, (29036), 6385 states have internal predecessors, (29036), 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) [2021-10-03 12:33:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 29036 transitions. [2021-10-03 12:33:40,855 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 29036 transitions. Word has length 35 [2021-10-03 12:33:40,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:40,855 INFO L470 AbstractCegarLoop]: Abstraction has 6386 states and 29036 transitions. [2021-10-03 12:33:40,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 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) [2021-10-03 12:33:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 29036 transitions. [2021-10-03 12:33:40,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:40,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:40,871 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:40,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-03 12:33:41,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:41,077 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash -756996630, now seen corresponding path program 49 times [2021-10-03 12:33:41,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:41,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144403864] [2021-10-03 12:33:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:41,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:33:41,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:41,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144403864] [2021-10-03 12:33:41,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144403864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:41,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719638356] [2021-10-03 12:33:41,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:33:41,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:41,170 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:41,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-03 12:33:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:44,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-03 12:33:44,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:33:44,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719638356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:44,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:44,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-03 12:33:44,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544421344] [2021-10-03 12:33:44,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 12:33:44,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 12:33:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:33:44,402 INFO L87 Difference]: Start difference. First operand 6386 states and 29036 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-10-03 12:33:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:44,616 INFO L93 Difference]: Finished difference Result 12112 states and 55779 transitions. [2021-10-03 12:33:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:33:44,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) Word has length 35 [2021-10-03 12:33:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:44,691 INFO L225 Difference]: With dead ends: 12112 [2021-10-03 12:33:44,691 INFO L226 Difference]: Without dead ends: 12082 [2021-10-03 12:33:44,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:33:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12082 states. [2021-10-03 12:33:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12082 to 11579. [2021-10-03 12:33:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11579 states, 11578 states have (on average 4.641993435826568) internal successors, (53745), 11578 states have internal predecessors, (53745), 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) [2021-10-03 12:33:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11579 states to 11579 states and 53745 transitions. [2021-10-03 12:33:45,070 INFO L78 Accepts]: Start accepts. Automaton has 11579 states and 53745 transitions. Word has length 35 [2021-10-03 12:33:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:45,070 INFO L470 AbstractCegarLoop]: Abstraction has 11579 states and 53745 transitions. [2021-10-03 12:33:45,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-10-03 12:33:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 11579 states and 53745 transitions. [2021-10-03 12:33:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:45,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:45,098 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:45,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-03 12:33:45,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:45,300 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:45,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1433568242, now seen corresponding path program 50 times [2021-10-03 12:33:45,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:45,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173784443] [2021-10-03 12:33:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:45,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:33:45,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:45,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173784443] [2021-10-03 12:33:45,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173784443] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:45,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835954988] [2021-10-03 12:33:45,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:33:45,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:45,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:45,391 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:45,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-03 12:33:48,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:33:48,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:33:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-03 12:33:48,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:33:48,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835954988] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:48,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:48,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-03 12:33:48,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077890149] [2021-10-03 12:33:48,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 12:33:48,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 12:33:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:33:48,801 INFO L87 Difference]: Start difference. First operand 11579 states and 53745 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-10-03 12:33:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:48,991 INFO L93 Difference]: Finished difference Result 16604 states and 75599 transitions. [2021-10-03 12:33:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:33:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) Word has length 35 [2021-10-03 12:33:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:49,057 INFO L225 Difference]: With dead ends: 16604 [2021-10-03 12:33:49,057 INFO L226 Difference]: Without dead ends: 16256 [2021-10-03 12:33:49,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:33:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16256 states. [2021-10-03 12:33:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16256 to 15540. [2021-10-03 12:33:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15540 states, 15539 states have (on average 4.552352146212755) internal successors, (70739), 15539 states have internal predecessors, (70739), 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) [2021-10-03 12:33:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15540 states to 15540 states and 70739 transitions. [2021-10-03 12:33:49,473 INFO L78 Accepts]: Start accepts. Automaton has 15540 states and 70739 transitions. Word has length 35 [2021-10-03 12:33:49,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:49,473 INFO L470 AbstractCegarLoop]: Abstraction has 15540 states and 70739 transitions. [2021-10-03 12:33:49,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-10-03 12:33:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 15540 states and 70739 transitions. [2021-10-03 12:33:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:49,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:49,514 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:49,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-10-03 12:33:49,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:49,718 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1277988492, now seen corresponding path program 51 times [2021-10-03 12:33:49,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:49,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657342] [2021-10-03 12:33:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:49,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:33:49,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:49,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657342] [2021-10-03 12:33:49,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657342] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:49,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77741767] [2021-10-03 12:33:49,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:33:49,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:49,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:49,792 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:49,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-03 12:33:52,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 12:33:52,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:33:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-03 12:33:52,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:33:53,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77741767] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:53,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:53,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-03 12:33:53,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548020957] [2021-10-03 12:33:53,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 12:33:53,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 12:33:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:33:53,058 INFO L87 Difference]: Start difference. First operand 15540 states and 70739 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:53,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:53,452 INFO L93 Difference]: Finished difference Result 16366 states and 74099 transitions. [2021-10-03 12:33:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:33:53,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:33:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:53,512 INFO L225 Difference]: With dead ends: 16366 [2021-10-03 12:33:53,512 INFO L226 Difference]: Without dead ends: 16366 [2021-10-03 12:33:53,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:33:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16366 states. [2021-10-03 12:33:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16366 to 15742. [2021-10-03 12:33:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15742 states, 15741 states have (on average 4.552569722381043) internal successors, (71662), 15741 states have internal predecessors, (71662), 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) [2021-10-03 12:33:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15742 states to 15742 states and 71662 transitions. [2021-10-03 12:33:54,064 INFO L78 Accepts]: Start accepts. Automaton has 15742 states and 71662 transitions. Word has length 35 [2021-10-03 12:33:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 15742 states and 71662 transitions. [2021-10-03 12:33:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 15742 states and 71662 transitions. [2021-10-03 12:33:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:54,102 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:54,102 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:54,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-10-03 12:33:54,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:54,313 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:54,314 INFO L82 PathProgramCache]: Analyzing trace with hash 847164512, now seen corresponding path program 52 times [2021-10-03 12:33:54,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:54,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178204281] [2021-10-03 12:33:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:54,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-03 12:33:54,591 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-03 12:33:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-03 12:33:54,696 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-03 12:33:54,697 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-03 12:33:54,698 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 12:33:54,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 12:33:54,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 12:33:54,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-03 12:33:54,702 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-03 12:33:54,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-10-03 12:33:54,710 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 12:33:54,710 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 12:33:54,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 12:33:54 BasicIcfg [2021-10-03 12:33:54,804 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 12:33:54,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 12:33:54,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 12:33:54,805 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 12:33:54,947 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:24:55" (3/4) ... [2021-10-03 12:33:54,951 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-03 12:33:55,087 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 12:33:55,087 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 12:33:55,088 INFO L168 Benchmark]: Toolchain (without parser) took 540605.37 ms. Allocated memory was 50.3 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 26.2 MB in the beginning and 1.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 723.5 MB. Max. memory is 16.1 GB. [2021-10-03 12:33:55,089 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 50.3 MB. Free memory is still 31.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:33:55,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.26 ms. Allocated memory is still 50.3 MB. Free memory was 25.9 MB in the beginning and 25.9 MB in the end (delta: 45.3 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-03 12:33:55,089 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.07 ms. Allocated memory is still 50.3 MB. Free memory was 25.9 MB in the beginning and 23.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 12:33:55,090 INFO L168 Benchmark]: Boogie Preprocessor took 54.62 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 23.6 MB in the beginning and 43.8 MB in the end (delta: -20.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-10-03 12:33:55,090 INFO L168 Benchmark]: RCFGBuilder took 1050.47 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 32.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-03 12:33:55,091 INFO L168 Benchmark]: TraceAbstraction took 538835.05 ms. Allocated memory was 60.8 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 31.8 MB in the beginning and 1.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 642.6 MB. Max. memory is 16.1 GB. [2021-10-03 12:33:55,091 INFO L168 Benchmark]: Witness Printer took 282.86 ms. Allocated memory is still 1.9 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -37.7 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. [2021-10-03 12:33:55,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 50.3 MB. Free memory is still 31.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 311.26 ms. Allocated memory is still 50.3 MB. Free memory was 25.9 MB in the beginning and 25.9 MB in the end (delta: 45.3 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.07 ms. Allocated memory is still 50.3 MB. Free memory was 25.9 MB in the beginning and 23.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.62 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 23.6 MB in the beginning and 43.8 MB in the end (delta: -20.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1050.47 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 32.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 538835.05 ms. Allocated memory was 60.8 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 31.8 MB in the beginning and 1.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 642.6 MB. Max. memory is 16.1 GB. * Witness Printer took 282.86 ms. Allocated memory is still 1.9 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -37.7 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8132.8ms, 177 PlacesBefore, 45 PlacesAfterwards, 180 TransitionsBefore, 38 TransitionsAfterwards, 1100 CoEnabledTransitionPairs, 8 FixpointIterations, 113 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 17 TrivialYvCompositions, 8 ConcurrentYvCompositions, 10 ChoiceCompositions, 167 TotalNumberOfCompositions, 3106 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2347, positive: 2223, positive conditional: 0, positive unconditional: 2223, negative: 124, negative conditional: 0, negative unconditional: 124, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 781, positive: 757, positive conditional: 0, positive unconditional: 757, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 781, positive: 747, positive conditional: 0, positive unconditional: 747, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 34, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 120, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 96, negative conditional: 0, negative unconditional: 96, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2347, positive: 1466, positive conditional: 0, positive unconditional: 1466, negative: 100, negative conditional: 0, negative unconditional: 100, unknown: 781, unknown conditional: 0, unknown unconditional: 781] , Statistics on independence cache: Total cache size (in pairs): 180, Positive cache size: 171, Positive conditional cache size: 0, Positive unconditional cache size: 171, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 95]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] 0 int *q1, *q2; [L18] 0 int q1_front, q1_back, q2_front, q2_back, i, j, n1, n2, N, C, total; [L69] 0 pthread_t t1, t2, t3, t4; [L71] 0 C = __VERIFIER_nondet_int() [L72] 0 N = __VERIFIER_nondet_int() [L73] 0 n1 = __VERIFIER_nondet_int() [L74] 0 n2 = __VERIFIER_nondet_int() [L75] 0 q1_front = __VERIFIER_nondet_int() [L76] 0 q1_back = q1_front [L77] 0 q2_front = __VERIFIER_nondet_int() [L78] 0 q2_back = q2_front [L14] COND FALSE 0 !(!cond) [L101] 0 int* arr = (int*)malloc(sizeof(int) * size); [L102] 0 int i = 0; VAL [C=-17, i=0, j=0, N=1, n1=1, n2=1, q1={0:0}, q1_back=0, q1_front=0, q2={0:0}, q2_back=0, q2_front=0, total=0] [L102] COND TRUE 0 i < size [L103] 0 arr[i] = __VERIFIER_nondet_int() [L102] 0 i++ VAL [C=-17, i=0, j=0, N=1, n1=1, n2=1, q1={0:0}, q1_back=0, q1_front=0, q2={0:0}, q2_back=0, q2_front=0, total=0] [L102] COND FALSE 0 !(i < size) [L105] 0 return arr; [L79] 0 q1 = create_fresh_int_array(n1) [L14] COND FALSE 0 !(!cond) [L101] 0 int* arr = (int*)malloc(sizeof(int) * size); [L102] 0 int i = 0; VAL [C=-17, i=0, j=0, N=1, n1=1, n2=1, q1={-3:0}, q1_back=0, q1_front=0, q2={0:0}, q2_back=0, q2_front=0, total=0] [L102] COND TRUE 0 i < size [L103] 0 arr[i] = __VERIFIER_nondet_int() [L102] 0 i++ VAL [C=-17, i=0, j=0, N=1, n1=1, n2=1, q1={-3:0}, q1_back=0, q1_front=0, q2={0:0}, q2_back=0, q2_front=0, total=0] [L102] COND FALSE 0 !(i < size) [L105] 0 return arr; [L80] 0 q2 = create_fresh_int_array(n2) [L14] COND FALSE 0 !(!cond) [L85] FCALL, FORK 0 pthread_create(&t1, NULL, thread1, NULL) VAL [C=-17, i=0, j=0, N=1, n1=1, n2=1, q1={-3:0}, q1_back=0, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L23] COND TRUE 1 i < N [L14] COND FALSE 1 !(!cond) [L26] 1 q1[q1_back] [L14] COND FALSE 1 !(!cond) [L27] 1 q1_back++ VAL [C=-17, i=0, j=0, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L86] FCALL, FORK 0 pthread_create(&t2, NULL, thread2, NULL) VAL [C=-17, i=0, j=0, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=0, q2_front=0, total=0] [L36] COND TRUE 2 j < N [L14] COND FALSE 2 !(!cond) [L39] 2 q2[q2_back] [L14] COND FALSE 2 !(!cond) [L40] 2 q2_back++ VAL [C=-17, i=0, j=0, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=1, q2_front=0, total=0] [L43] 2 j++ VAL [C=-17, i=0, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=1, q2_front=0, total=0] [L36] COND FALSE 2 !(j < N) [L87] FCALL, FORK 0 pthread_create(&t3, NULL, thread3, NULL) VAL [C=-17, i=0, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=1, q2_front=0, total=0] [L88] FCALL, FORK 0 pthread_create(&t4, NULL, thread4, NULL) VAL [C=-17, i=0, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=1, q2_front=0, total=0] [L49] COND TRUE 3 i < N || q1_front < q1_back VAL [C=-17, i=0, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=0, q2={3:0}, q2_back=1, q2_front=0, total=0] [L52] EXPR 3 q1[q1_front] [L52] 3 total = total + q1[q1_front] [L53] 3 q1_front++ VAL [C=-17, i=0, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=1, q2={3:0}, q2_back=1, q2_front=0, total=-17] [L49] COND TRUE 3 i < N || q1_front < q1_back VAL [C=-17, i=0, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=1, q2={3:0}, q2_back=1, q2_front=0, total=-17] [L52] EXPR 3 q1[q1_front] [L52] 3 total = total + q1[q1_front] [L53] 3 q1_front++ VAL [C=-17, i=0, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=0, total=-8] [L59] COND TRUE 4 j < N || q2_front < q2_back VAL [C=-17, i=0, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=0, total=-8] [L14] COND FALSE 4 !(!cond) [L62] EXPR 4 q2[q2_front] [L62] 4 total = total + q2[q2_front] [L63] 4 q2_front++ VAL [C=-17, i=0, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L59] COND FALSE 4 !(j < N || q2_front < q2_back) [L30] 1 i++ VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L49] COND FALSE 3 !(i < N || q1_front < q1_back) [L23] COND FALSE 1 !(i < N) [L89] 0 \read(t1) VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L89] FCALL, JOIN 1 pthread_join(t1, 0) VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L90] 0 \read(t2) VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L90] FCALL, JOIN 2 pthread_join(t2, 0) VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L91] 0 \read(t3) VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L91] FCALL, JOIN 3 pthread_join(t3, 0) VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L92] 0 \read(t4) VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L92] FCALL, JOIN 4 pthread_join(t4, 0) VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] [L14] COND FALSE 0 !(!cond) [L95] 0 reach_error() VAL [C=-17, i=1, j=1, N=1, n1=1, n2=1, q1={-3:0}, q1_back=1, q1_front=2, q2={3:0}, q2_back=1, q2_front=1, total=9] - UnprovableResult [Line: 86]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 85]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 87]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 187 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 538546.3ms, OverallIterations: 64, TraceHistogramMax: 3, EmptinessCheckTime: 1093.4ms, AutomataDifference: 238185.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8219.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3178 SDtfs, 19437 SDslu, 34307 SDs, 0 SdLazy, 56929 SolverSat, 3912 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 98548.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3309 GetRequests, 1241 SyntacticMatches, 49 SemanticMatches, 2019 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17572 ImplicationChecksByTransitivity, 187596.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15742occurred in iteration=63, InterpolantAutomatonStates: 1363, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 12092.4ms AutomataMinimizationTime, 63 MinimizatonAttempts, 210112 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 869.7ms SsaConstructionTime, 5917.7ms SatisfiabilityAnalysisTime, 176464.7ms InterpolantComputationTime, 3905 NumberOfCodeBlocks, 3905 NumberOfCodeBlocksAsserted, 187 NumberOfCheckSat, 3752 ConstructedInterpolants, 184 QuantifiedInterpolants, 139683 SizeOfPredicates, 1428 NumberOfNonLiveVariables, 14309 ConjunctsInSsa, 2743 ConjunctsInUnsatCore, 118 InterpolantComputations, 9 PerfectInterpolantSequences, 128/789 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-03 12:33:55,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...