./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 22:16:17,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 22:16:17,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 22:16:17,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 22:16:17,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 22:16:17,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 22:16:17,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 22:16:17,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 22:16:17,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 22:16:17,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 22:16:17,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 22:16:17,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 22:16:17,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 22:16:17,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 22:16:17,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 22:16:17,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 22:16:17,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 22:16:17,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 22:16:17,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 22:16:17,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 22:16:17,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 22:16:17,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 22:16:17,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 22:16:17,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 22:16:17,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 22:16:17,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 22:16:17,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 22:16:17,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 22:16:17,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 22:16:17,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 22:16:17,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 22:16:17,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 22:16:17,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 22:16:17,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 22:16:17,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 22:16:17,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 22:16:17,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 22:16:17,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 22:16:17,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 22:16:17,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 22:16:17,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 22:16:17,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 22:16:17,908 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 22:16:17,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 22:16:17,909 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 22:16:17,909 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 22:16:17,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 22:16:17,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 22:16:17,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 22:16:17,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 22:16:17,911 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 22:16:17,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 22:16:17,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 22:16:17,912 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 22:16:17,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 22:16:17,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 22:16:17,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 22:16:17,913 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 22:16:17,913 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 22:16:17,913 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 22:16:17,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 22:16:17,914 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 22:16:17,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 22:16:17,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 22:16:17,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 22:16:17,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 22:16:17,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 22:16:17,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:16:17,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 22:16:17,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 22:16:17,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 22:16:17,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 22:16:17,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 22:16:17,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 [2021-12-18 22:16:18,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 22:16:18,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 22:16:18,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 22:16:18,197 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 22:16:18,198 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 22:16:18,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-12-18 22:16:18,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05a6a7ca/8961adb798e84c9aa8523ead243038a7/FLAGb263e16a6 [2021-12-18 22:16:18,718 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 22:16:18,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-12-18 22:16:18,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05a6a7ca/8961adb798e84c9aa8523ead243038a7/FLAGb263e16a6 [2021-12-18 22:16:19,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05a6a7ca/8961adb798e84c9aa8523ead243038a7 [2021-12-18 22:16:19,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 22:16:19,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 22:16:19,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 22:16:19,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 22:16:19,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 22:16:19,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42930f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19, skipping insertion in model container [2021-12-18 22:16:19,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 22:16:19,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 22:16:19,405 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-12-18 22:16:19,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:16:19,417 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 22:16:19,463 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-12-18 22:16:19,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:16:19,485 INFO L208 MainTranslator]: Completed translation [2021-12-18 22:16:19,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19 WrapperNode [2021-12-18 22:16:19,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 22:16:19,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 22:16:19,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 22:16:19,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 22:16:19,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,541 INFO L137 Inliner]: procedures = 127, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 106 [2021-12-18 22:16:19,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 22:16:19,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 22:16:19,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 22:16:19,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 22:16:19,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 22:16:19,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 22:16:19,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 22:16:19,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 22:16:19,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (1/1) ... [2021-12-18 22:16:19,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:16:19,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:16:19,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 22:16:19,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 22:16:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 22:16:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 22:16:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-18 22:16:19,681 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-18 22:16:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 22:16:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 22:16:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 22:16:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 22:16:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 22:16:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 22:16:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 22:16:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 22:16:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 22:16:19,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 22:16:19,787 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 22:16:19,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 22:16:19,987 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 22:16:19,993 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 22:16:19,994 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-18 22:16:19,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:16:19 BoogieIcfgContainer [2021-12-18 22:16:19,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 22:16:19,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 22:16:19,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 22:16:20,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 22:16:20,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 10:16:19" (1/3) ... [2021-12-18 22:16:20,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be17416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:16:20, skipping insertion in model container [2021-12-18 22:16:20,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:19" (2/3) ... [2021-12-18 22:16:20,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be17416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:16:20, skipping insertion in model container [2021-12-18 22:16:20,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:16:19" (3/3) ... [2021-12-18 22:16:20,005 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2021-12-18 22:16:20,009 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 22:16:20,010 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2021-12-18 22:16:20,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 22:16:20,052 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 22:16:20,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-12-18 22:16:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:16:20,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:20,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:20,067 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:20,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1813073593, now seen corresponding path program 1 times [2021-12-18 22:16:20,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:16:20,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441015542] [2021-12-18 22:16:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:20,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:16:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:20,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:16:20,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441015542] [2021-12-18 22:16:20,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441015542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:20,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:20,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:16:20,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472202575] [2021-12-18 22:16:20,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:20,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:16:20,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:16:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:16:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:20,321 INFO L87 Difference]: Start difference. First operand has 73 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 22:16:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:20,409 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-12-18 22:16:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:16:20,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 22:16:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:20,419 INFO L225 Difference]: With dead ends: 71 [2021-12-18 22:16:20,419 INFO L226 Difference]: Without dead ends: 68 [2021-12-18 22:16:20,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:20,427 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:20,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:16:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-18 22:16:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-12-18 22:16:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.7) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-12-18 22:16:20,469 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 7 [2021-12-18 22:16:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:20,469 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-12-18 22:16:20,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 22:16:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-12-18 22:16:20,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:16:20,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:20,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:20,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 22:16:20,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1813073594, now seen corresponding path program 1 times [2021-12-18 22:16:20,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:16:20,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52938828] [2021-12-18 22:16:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:20,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:16:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:20,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:16:20,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52938828] [2021-12-18 22:16:20,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52938828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:20,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:20,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:16:20,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146213545] [2021-12-18 22:16:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:20,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:16:20,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:16:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:16:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:20,557 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 22:16:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:20,613 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-12-18 22:16:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:16:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 22:16:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:20,617 INFO L225 Difference]: With dead ends: 66 [2021-12-18 22:16:20,617 INFO L226 Difference]: Without dead ends: 66 [2021-12-18 22:16:20,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:20,620 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:20,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 108 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:16:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-18 22:16:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-18 22:16:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.65) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-18 22:16:20,627 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 7 [2021-12-18 22:16:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:20,627 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-18 22:16:20,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 22:16:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-18 22:16:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 22:16:20,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:20,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:20,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 22:16:20,629 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1431584192, now seen corresponding path program 1 times [2021-12-18 22:16:20,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:16:20,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356656918] [2021-12-18 22:16:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:20,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:16:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:20,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 22:16:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:20,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:16:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356656918] [2021-12-18 22:16:20,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356656918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:20,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:20,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 22:16:20,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609659289] [2021-12-18 22:16:20,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:20,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 22:16:20,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:16:20,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 22:16:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:16:20,801 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:20,957 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-12-18 22:16:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:16:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-18 22:16:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:20,961 INFO L225 Difference]: With dead ends: 70 [2021-12-18 22:16:20,961 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 22:16:20,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 22:16:20,968 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:20,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 249 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:16:20,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 22:16:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-12-18 22:16:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.625) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-12-18 22:16:20,988 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 13 [2021-12-18 22:16:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:20,989 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-12-18 22:16:20,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-12-18 22:16:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 22:16:20,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:20,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:20,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 22:16:20,990 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:20,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:20,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1431584193, now seen corresponding path program 1 times [2021-12-18 22:16:20,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:16:20,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153253886] [2021-12-18 22:16:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:20,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:16:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:21,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 22:16:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:21,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:16:21,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153253886] [2021-12-18 22:16:21,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153253886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:21,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:21,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 22:16:21,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146788445] [2021-12-18 22:16:21,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:21,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 22:16:21,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:16:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 22:16:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 22:16:21,173 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:21,321 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-12-18 22:16:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:16:21,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-18 22:16:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:21,325 INFO L225 Difference]: With dead ends: 69 [2021-12-18 22:16:21,325 INFO L226 Difference]: Without dead ends: 69 [2021-12-18 22:16:21,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-18 22:16:21,338 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 14 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:21,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 289 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:16:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-18 22:16:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2021-12-18 22:16:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.6) internal successors, (64), 60 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-12-18 22:16:21,346 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 13 [2021-12-18 22:16:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:21,346 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-12-18 22:16:21,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-12-18 22:16:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 22:16:21,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:21,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:21,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 22:16:21,347 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:21,348 INFO L85 PathProgramCache]: Analyzing trace with hash 869381824, now seen corresponding path program 1 times [2021-12-18 22:16:21,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:16:21,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946453181] [2021-12-18 22:16:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:21,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:16:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-18 22:16:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:21,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:16:21,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946453181] [2021-12-18 22:16:21,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946453181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:21,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:21,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 22:16:21,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576646017] [2021-12-18 22:16:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:21,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 22:16:21,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:16:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 22:16:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:16:21,393 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:21,436 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-12-18 22:16:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 22:16:21,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-18 22:16:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:21,437 INFO L225 Difference]: With dead ends: 70 [2021-12-18 22:16:21,437 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 22:16:21,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:16:21,438 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:21,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 159 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:16:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 22:16:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-12-18 22:16:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-12-18 22:16:21,443 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 15 [2021-12-18 22:16:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:21,443 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-12-18 22:16:21,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-12-18 22:16:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 22:16:21,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:21,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:21,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 22:16:21,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash -206453950, now seen corresponding path program 1 times [2021-12-18 22:16:21,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:16:21,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138111843] [2021-12-18 22:16:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:21,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:16:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:21,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 22:16:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:21,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 22:16:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 22:16:21,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:16:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138111843] [2021-12-18 22:16:21,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138111843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:16:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911129941] [2021-12-18 22:16:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:21,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:16:21,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:16:21,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:16:21,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 22:16:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:21,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:16:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:21,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:16:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 22:16:21,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911129941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:16:21,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:16:21,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-12-18 22:16:21,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135899311] [2021-12-18 22:16:21,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:16:21,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:16:21,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:16:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:16:21,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:16:21,829 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 22:16:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:21,909 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-12-18 22:16:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:16:21,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-18 22:16:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:21,911 INFO L225 Difference]: With dead ends: 71 [2021-12-18 22:16:21,911 INFO L226 Difference]: Without dead ends: 71 [2021-12-18 22:16:21,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:16:21,912 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 8 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:21,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 161 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:16:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-18 22:16:21,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-18 22:16:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:16:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-12-18 22:16:21,916 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 28 [2021-12-18 22:16:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:21,916 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-12-18 22:16:21,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 22:16:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-12-18 22:16:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 22:16:21,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:21,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:21,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:22,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-18 22:16:22,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:22,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:22,131 INFO L85 PathProgramCache]: Analyzing trace with hash 400923136, now seen corresponding path program 2 times [2021-12-18 22:16:22,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:16:22,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599071261] [2021-12-18 22:16:22,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:22,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:16:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 22:16:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:22,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 22:16:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:22,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-18 22:16:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 22:16:22,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:16:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599071261] [2021-12-18 22:16:22,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599071261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:16:22,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086281676] [2021-12-18 22:16:22,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:16:22,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:16:22,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:16:22,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:16:22,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 22:16:22,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:16:22,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:16:22,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 22:16:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:22,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:22,630 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 5 treesize of output 3 [2021-12-18 22:16:22,816 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 21315 column 46: unknown constant v_#valid_BEFORE_CALL_2 [2021-12-18 22:16:22,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 22:16:22,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-18 22:16:22,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007736366] [2021-12-18 22:16:22,817 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 22:16:22,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:16:22,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:16:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:16:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 22:16:22,819 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 22:16:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 22:16:22,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 22:16:22,821 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:22,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:16:22,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:23,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-18 22:16:23,046 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@6c9cc92 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-18 22:16:23,050 INFO L158 Benchmark]: Toolchain (without parser) took 3987.47ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 49.6MB in the beginning and 50.0MB in the end (delta: -410.1kB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2021-12-18 22:16:23,050 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 81.8MB. Free memory was 51.8MB in the beginning and 51.8MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 22:16:23,050 INFO L158 Benchmark]: CACSL2BoogieTranslator took 423.25ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 49.4MB in the beginning and 67.6MB in the end (delta: -18.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 22:16:23,051 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.25ms. Allocated memory is still 98.6MB. Free memory was 67.6MB in the beginning and 65.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 22:16:23,051 INFO L158 Benchmark]: Boogie Preprocessor took 52.98ms. Allocated memory is still 98.6MB. Free memory was 65.4MB in the beginning and 63.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 22:16:23,051 INFO L158 Benchmark]: RCFGBuilder took 401.62ms. Allocated memory is still 98.6MB. Free memory was 63.4MB in the beginning and 48.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-18 22:16:23,052 INFO L158 Benchmark]: TraceAbstraction took 3049.92ms. Allocated memory is still 98.6MB. Free memory was 48.1MB in the beginning and 50.0MB in the end (delta: -1.9MB). Peak memory consumption was 1.0MB. Max. memory is 16.1GB. [2021-12-18 22:16:23,053 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 81.8MB. Free memory was 51.8MB in the beginning and 51.8MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 423.25ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 49.4MB in the beginning and 67.6MB in the end (delta: -18.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.25ms. Allocated memory is still 98.6MB. Free memory was 67.6MB in the beginning and 65.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.98ms. Allocated memory is still 98.6MB. Free memory was 65.4MB in the beginning and 63.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 401.62ms. Allocated memory is still 98.6MB. Free memory was 63.4MB in the beginning and 48.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 3049.92ms. Allocated memory is still 98.6MB. Free memory was 48.1MB in the beginning and 50.0MB in the end (delta: -1.9MB). Peak memory consumption was 1.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@6c9cc92 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@6c9cc92: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-18 22:16:23,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 22:16:25,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 22:16:25,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 22:16:25,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 22:16:25,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 22:16:25,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 22:16:25,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 22:16:25,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 22:16:25,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 22:16:25,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 22:16:25,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 22:16:25,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 22:16:25,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 22:16:25,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 22:16:25,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 22:16:25,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 22:16:25,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 22:16:25,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 22:16:25,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 22:16:25,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 22:16:25,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 22:16:25,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 22:16:25,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 22:16:25,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 22:16:25,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 22:16:25,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 22:16:25,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 22:16:25,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 22:16:25,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 22:16:25,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 22:16:25,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 22:16:25,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 22:16:25,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 22:16:25,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 22:16:25,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 22:16:25,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 22:16:25,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 22:16:25,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 22:16:25,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 22:16:25,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 22:16:25,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 22:16:25,126 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 22:16:25,160 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 22:16:25,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 22:16:25,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 22:16:25,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 22:16:25,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 22:16:25,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 22:16:25,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 22:16:25,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 22:16:25,164 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 22:16:25,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 22:16:25,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 22:16:25,165 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 22:16:25,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 22:16:25,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 22:16:25,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 22:16:25,166 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 22:16:25,167 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 22:16:25,167 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 22:16:25,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 22:16:25,167 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 22:16:25,167 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 22:16:25,168 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 22:16:25,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 22:16:25,168 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 22:16:25,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 22:16:25,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 22:16:25,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 22:16:25,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:16:25,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 22:16:25,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 22:16:25,170 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 22:16:25,170 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 22:16:25,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 22:16:25,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 22:16:25,171 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 [2021-12-18 22:16:25,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 22:16:25,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 22:16:25,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 22:16:25,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 22:16:25,515 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 22:16:25,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-12-18 22:16:25,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73956332d/18325d1b790e4f2ca6c6f89c619a66bb/FLAG025134a07 [2021-12-18 22:16:26,065 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 22:16:26,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-12-18 22:16:26,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73956332d/18325d1b790e4f2ca6c6f89c619a66bb/FLAG025134a07 [2021-12-18 22:16:26,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73956332d/18325d1b790e4f2ca6c6f89c619a66bb [2021-12-18 22:16:26,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 22:16:26,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 22:16:26,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 22:16:26,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 22:16:26,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 22:16:26,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:16:26" (1/1) ... [2021-12-18 22:16:26,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2a64a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:26, skipping insertion in model container [2021-12-18 22:16:26,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:16:26" (1/1) ... [2021-12-18 22:16:26,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 22:16:26,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 22:16:26,983 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-12-18 22:16:26,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:16:26,998 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 22:16:27,043 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-12-18 22:16:27,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:16:27,080 INFO L208 MainTranslator]: Completed translation [2021-12-18 22:16:27,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27 WrapperNode [2021-12-18 22:16:27,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 22:16:27,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 22:16:27,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 22:16:27,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 22:16:27,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,150 INFO L137 Inliner]: procedures = 130, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 107 [2021-12-18 22:16:27,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 22:16:27,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 22:16:27,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 22:16:27,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 22:16:27,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 22:16:27,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 22:16:27,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 22:16:27,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 22:16:27,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (1/1) ... [2021-12-18 22:16:27,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:16:27,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:16:27,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 22:16:27,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-18 22:16:27,268 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-18 22:16:27,268 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-18 22:16:27,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 22:16:27,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 22:16:27,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 22:16:27,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 22:16:27,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 22:16:27,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 22:16:27,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-18 22:16:27,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 22:16:27,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 22:16:27,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 22:16:27,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 22:16:27,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 22:16:27,420 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 22:16:27,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 22:16:27,667 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 22:16:27,673 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 22:16:27,673 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-18 22:16:27,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:16:27 BoogieIcfgContainer [2021-12-18 22:16:27,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 22:16:27,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 22:16:27,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 22:16:27,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 22:16:27,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 10:16:26" (1/3) ... [2021-12-18 22:16:27,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67498c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:16:27, skipping insertion in model container [2021-12-18 22:16:27,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:16:27" (2/3) ... [2021-12-18 22:16:27,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67498c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:16:27, skipping insertion in model container [2021-12-18 22:16:27,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:16:27" (3/3) ... [2021-12-18 22:16:27,681 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2021-12-18 22:16:27,685 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 22:16:27,685 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2021-12-18 22:16:27,720 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 22:16:27,725 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 22:16:27,726 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-12-18 22:16:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:16:27,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:27,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:27,750 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1813073593, now seen corresponding path program 1 times [2021-12-18 22:16:27,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:27,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645356782] [2021-12-18 22:16:27,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:27,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:27,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:27,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:27,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 22:16:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 22:16:27,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:27,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:27,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:16:27,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:27,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645356782] [2021-12-18 22:16:27,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645356782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:27,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:27,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:16:27,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982281285] [2021-12-18 22:16:27,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:27,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:16:27,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:16:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:28,016 INFO L87 Difference]: Start difference. First operand has 73 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 22:16:28,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:28,148 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-12-18 22:16:28,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:16:28,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 22:16:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:28,173 INFO L225 Difference]: With dead ends: 71 [2021-12-18 22:16:28,173 INFO L226 Difference]: Without dead ends: 68 [2021-12-18 22:16:28,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:28,177 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:28,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:16:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-18 22:16:28,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-12-18 22:16:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.7) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-12-18 22:16:28,215 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 7 [2021-12-18 22:16:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:28,216 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-12-18 22:16:28,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 22:16:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-12-18 22:16:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:16:28,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:28,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:28,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:28,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:16:28,427 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1813073594, now seen corresponding path program 1 times [2021-12-18 22:16:28,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411927498] [2021-12-18 22:16:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:28,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:28,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:28,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:28,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 22:16:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 22:16:28,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:28,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:28,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:16:28,550 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:28,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411927498] [2021-12-18 22:16:28,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411927498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:28,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:28,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:16:28,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050718329] [2021-12-18 22:16:28,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:28,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:16:28,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:28,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:16:28,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:28,559 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 22:16:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:28,670 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-12-18 22:16:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:16:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 22:16:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:28,672 INFO L225 Difference]: With dead ends: 66 [2021-12-18 22:16:28,672 INFO L226 Difference]: Without dead ends: 66 [2021-12-18 22:16:28,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:28,673 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:28,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 108 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:16:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-18 22:16:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-18 22:16:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.65) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-18 22:16:28,679 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 7 [2021-12-18 22:16:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:28,679 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-18 22:16:28,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 22:16:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-18 22:16:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 22:16:28,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:28,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:28,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:28,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:16:28,892 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1431584192, now seen corresponding path program 1 times [2021-12-18 22:16:28,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:28,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332844436] [2021-12-18 22:16:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:28,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:28,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:28,895 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:28,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 22:16:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:28,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 22:16:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:29,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:29,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:16:29,076 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:29,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332844436] [2021-12-18 22:16:29,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332844436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:29,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:29,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 22:16:29,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839860101] [2021-12-18 22:16:29,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:29,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:16:29,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:16:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:16:29,078 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:29,309 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-12-18 22:16:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:16:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-18 22:16:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:29,312 INFO L225 Difference]: With dead ends: 70 [2021-12-18 22:16:29,312 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 22:16:29,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:16:29,313 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 10 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:29,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 222 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:16:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 22:16:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-12-18 22:16:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.625) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-12-18 22:16:29,321 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 13 [2021-12-18 22:16:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:29,322 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-12-18 22:16:29,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-12-18 22:16:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 22:16:29,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:29,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:29,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:29,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:16:29,532 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1431584193, now seen corresponding path program 1 times [2021-12-18 22:16:29,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:29,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382927501] [2021-12-18 22:16:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:29,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:29,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:29,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:29,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 22:16:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:29,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 22:16:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:29,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:29,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:16:29,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382927501] [2021-12-18 22:16:29,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382927501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:29,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:29,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 22:16:29,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104446222] [2021-12-18 22:16:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:29,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:16:29,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:16:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:16:29,756 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:29,989 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-12-18 22:16:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:16:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-18 22:16:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:29,991 INFO L225 Difference]: With dead ends: 69 [2021-12-18 22:16:29,991 INFO L226 Difference]: Without dead ends: 69 [2021-12-18 22:16:29,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:16:29,992 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 9 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:29,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 238 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:16:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-18 22:16:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2021-12-18 22:16:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.6) internal successors, (64), 60 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-12-18 22:16:29,997 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 13 [2021-12-18 22:16:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:29,998 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-12-18 22:16:29,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-12-18 22:16:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 22:16:29,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:29,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:30,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:30,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:16:30,207 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash 869381824, now seen corresponding path program 1 times [2021-12-18 22:16:30,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:30,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799429691] [2021-12-18 22:16:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:30,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:30,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:30,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:30,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 22:16:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 22:16:30,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:30,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:16:30,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:30,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799429691] [2021-12-18 22:16:30,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799429691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:30,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:30,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:16:30,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240099913] [2021-12-18 22:16:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:30,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:16:30,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:16:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:30,321 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:30,327 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-12-18 22:16:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:16:30,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-18 22:16:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:30,328 INFO L225 Difference]: With dead ends: 70 [2021-12-18 22:16:30,329 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 22:16:30,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:16:30,329 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:30,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 131 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:16:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 22:16:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-12-18 22:16:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-12-18 22:16:30,334 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 15 [2021-12-18 22:16:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:30,334 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-12-18 22:16:30,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 22:16:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-12-18 22:16:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 22:16:30,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:30,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:30,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:30,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:16:30,545 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:30,546 INFO L85 PathProgramCache]: Analyzing trace with hash -206453950, now seen corresponding path program 1 times [2021-12-18 22:16:30,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:30,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128358041] [2021-12-18 22:16:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:30,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:30,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:30,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:30,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 22:16:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:30,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:16:30,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:30,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:16:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 22:16:30,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:30,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128358041] [2021-12-18 22:16:30,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128358041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:16:30,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:16:30,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-18 22:16:30,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172673222] [2021-12-18 22:16:30,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:16:30,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:16:30,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:30,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:16:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:16:30,782 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 22:16:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:30,808 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-12-18 22:16:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:16:30,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-18 22:16:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:30,811 INFO L225 Difference]: With dead ends: 76 [2021-12-18 22:16:30,811 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 22:16:30,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:16:30,812 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 11 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:30,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 325 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:16:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 22:16:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-12-18 22:16:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:16:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-12-18 22:16:30,817 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 28 [2021-12-18 22:16:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:30,817 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-12-18 22:16:30,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 22:16:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-12-18 22:16:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 22:16:30,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:30,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:30,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:31,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:16:31,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:31,029 INFO L85 PathProgramCache]: Analyzing trace with hash 400923136, now seen corresponding path program 2 times [2021-12-18 22:16:31,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:31,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919644450] [2021-12-18 22:16:31,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:16:31,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:31,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:31,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 22:16:31,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:16:31,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:16:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:16:31,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:31,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:31,250 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 8 treesize of output 6 [2021-12-18 22:16:31,412 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:16:31,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 22:16:31,469 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 8 treesize of output 6 [2021-12-18 22:16:31,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:16:31,589 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 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-18 22:16:31,878 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 22:16:31,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 20 [2021-12-18 22:16:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:16:31,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:16:32,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919644450] [2021-12-18 22:16:32,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919644450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:16:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [565003082] [2021-12-18 22:16:32,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:16:32,230 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:16:32,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:16:32,235 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:16:32,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-18 22:16:32,428 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 22:16:32,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578691366] [2021-12-18 22:16:32,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:16:32,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:16:32,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:16:32,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 1 [2021-12-18 22:16:32,430 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:16:32,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 22:16:32,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:16:32,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:16:32,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 22:16:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:32,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:34,734 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:16:34,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 22:16:36,879 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:16:36,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 22:16:37,027 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 22:16:37,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 19 [2021-12-18 22:16:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 12 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 22:16:37,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:16:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 22:16:37,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578691366] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 22:16:37,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:16:37,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 13 [2021-12-18 22:16:37,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063319043] [2021-12-18 22:16:37,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:37,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:16:37,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:37,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:16:37,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2021-12-18 22:16:37,592 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:37,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:37,707 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-12-18 22:16:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:16:37,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-12-18 22:16:37,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:37,709 INFO L225 Difference]: With dead ends: 80 [2021-12-18 22:16:37,709 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 22:16:37,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 106 SyntacticMatches, 19 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=42, Invalid=197, Unknown=1, NotChecked=0, Total=240 [2021-12-18 22:16:37,710 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 71 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:37,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 102 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2021-12-18 22:16:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 22:16:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2021-12-18 22:16:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 63 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:16:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-12-18 22:16:37,714 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 41 [2021-12-18 22:16:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:37,714 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-12-18 22:16:37,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-12-18 22:16:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 22:16:37,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:37,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:37,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:37,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:38,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:16:38,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 400923137, now seen corresponding path program 1 times [2021-12-18 22:16:38,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:38,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618919258] [2021-12-18 22:16:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:38,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:38,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:38,122 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:38,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 22:16:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 22:16:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:38,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:38,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:38,362 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 8 treesize of output 6 [2021-12-18 22:16:38,366 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 5 treesize of output 3 [2021-12-18 22:16:40,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:16:40,535 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:16:40,550 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:16:40,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 14 [2021-12-18 22:16:40,646 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 5 treesize of output 3 [2021-12-18 22:16:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:16:42,825 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:16:43,298 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:16:43,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-12-18 22:16:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:43,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:16:43,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618919258] [2021-12-18 22:16:43,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618919258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:16:43,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [624053846] [2021-12-18 22:16:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:43,723 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:16:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:16:43,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:16:43,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-12-18 22:16:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:43,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 22:16:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:43,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:43,977 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 5 treesize of output 3 [2021-12-18 22:16:44,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:16:44,136 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:16:44,259 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 5 treesize of output 3 [2021-12-18 22:16:46,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:16:46,507 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:16:46,725 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 5 treesize of output 3 [2021-12-18 22:16:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:16:46,866 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:16:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 22:16:46,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:16:49,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [624053846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:16:49,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:16:49,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-12-18 22:16:49,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593654772] [2021-12-18 22:16:49,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:16:49,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 22:16:49,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:49,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 22:16:49,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=479, Unknown=3, NotChecked=0, Total=552 [2021-12-18 22:16:49,119 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 21 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 22:16:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:57,781 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-12-18 22:16:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:16:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-12-18 22:16:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:57,782 INFO L225 Difference]: With dead ends: 74 [2021-12-18 22:16:57,782 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 22:16:57,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=115, Invalid=808, Unknown=7, NotChecked=0, Total=930 [2021-12-18 22:16:57,784 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:57,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 545 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 205 Unchecked, 0.2s Time] [2021-12-18 22:16:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 22:16:57,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-18 22:16:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:16:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-12-18 22:16:57,788 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 41 [2021-12-18 22:16:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:57,788 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-12-18 22:16:57,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 22:16:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-12-18 22:16:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 22:16:57,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:57,790 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:57,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:58,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:58,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:16:58,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash -456284671, now seen corresponding path program 1 times [2021-12-18 22:16:58,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:58,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796629143] [2021-12-18 22:16:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:58,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:58,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:58,203 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:58,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 22:16:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:58,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 22:16:58,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:58,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 22:16:58,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:16:58,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:58,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796629143] [2021-12-18 22:16:58,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796629143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:58,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:58,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 22:16:58,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057639615] [2021-12-18 22:16:58,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:58,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:16:58,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:16:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:16:58,506 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 22:16:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:58,690 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-12-18 22:16:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:16:58,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-12-18 22:16:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:58,691 INFO L225 Difference]: With dead ends: 73 [2021-12-18 22:16:58,691 INFO L226 Difference]: Without dead ends: 73 [2021-12-18 22:16:58,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:16:58,692 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 43 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:58,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 160 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:16:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-18 22:16:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-18 22:16:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 67 states have internal predecessors, (71), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:16:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-12-18 22:16:58,696 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 42 [2021-12-18 22:16:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:58,697 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-12-18 22:16:58,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 22:16:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-12-18 22:16:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 22:16:58,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:58,698 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:58,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:58,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:16:58,903 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash -456284672, now seen corresponding path program 1 times [2021-12-18 22:16:58,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:58,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91190280] [2021-12-18 22:16:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:58,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:58,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:58,905 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:58,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 22:16:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:59,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 22:16:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:59,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:16:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 22:16:59,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:16:59,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91190280] [2021-12-18 22:16:59,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91190280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:59,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:59,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 22:16:59,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794442938] [2021-12-18 22:16:59,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:59,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:16:59,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:16:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:16:59,102 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 22:16:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:59,267 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-12-18 22:16:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:16:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-12-18 22:16:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:59,270 INFO L225 Difference]: With dead ends: 84 [2021-12-18 22:16:59,270 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 22:16:59,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:16:59,271 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:59,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:16:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 22:16:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2021-12-18 22:16:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:16:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-12-18 22:16:59,280 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 42 [2021-12-18 22:16:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:59,280 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-12-18 22:16:59,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 22:16:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-12-18 22:16:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 22:16:59,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:59,281 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:59,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 22:16:59,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:16:59,491 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:16:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:16:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -402905502, now seen corresponding path program 1 times [2021-12-18 22:16:59,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:16:59,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859399264] [2021-12-18 22:16:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:59,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:16:59,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:16:59,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:16:59,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 22:16:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:16:59,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 22:16:59,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:16:59,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859399264] [2021-12-18 22:16:59,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859399264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:16:59,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:16:59,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 22:16:59,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98824868] [2021-12-18 22:16:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:16:59,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:16:59,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:16:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:16:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:16:59,759 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:16:59,877 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-12-18 22:16:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:16:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-18 22:16:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:16:59,879 INFO L225 Difference]: With dead ends: 71 [2021-12-18 22:16:59,879 INFO L226 Difference]: Without dead ends: 71 [2021-12-18 22:16:59,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:16:59,879 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 80 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:16:59,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 88 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:16:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-18 22:16:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-18 22:16:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 65 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:16:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-12-18 22:16:59,882 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 44 [2021-12-18 22:16:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:16:59,882 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-12-18 22:16:59,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:16:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-12-18 22:16:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 22:16:59,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:16:59,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:16:59,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 22:17:00,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:17:00,093 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:17:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:17:00,094 INFO L85 PathProgramCache]: Analyzing trace with hash -645131486, now seen corresponding path program 1 times [2021-12-18 22:17:00,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:17:00,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472241561] [2021-12-18 22:17:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:00,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:17:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:17:00,095 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:17:00,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 22:17:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 22:17:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 22:17:00,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:17:00,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:17:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472241561] [2021-12-18 22:17:00,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472241561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:17:00,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:17:00,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:17:00,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856933403] [2021-12-18 22:17:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:17:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 22:17:00,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:17:00,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 22:17:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:17:00,297 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:17:00,378 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-12-18 22:17:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:17:00,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-18 22:17:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:17:00,379 INFO L225 Difference]: With dead ends: 82 [2021-12-18 22:17:00,379 INFO L226 Difference]: Without dead ends: 82 [2021-12-18 22:17:00,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:17:00,380 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 80 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:17:00,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 83 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:17:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-18 22:17:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2021-12-18 22:17:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:17:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-12-18 22:17:00,383 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 46 [2021-12-18 22:17:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:17:00,383 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-12-18 22:17:00,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-12-18 22:17:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 22:17:00,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:17:00,384 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:17:00,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-18 22:17:00,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:17:00,594 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:17:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:17:00,595 INFO L85 PathProgramCache]: Analyzing trace with hash -645131485, now seen corresponding path program 1 times [2021-12-18 22:17:00,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:17:00,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239313908] [2021-12-18 22:17:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:00,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:17:00,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:17:00,596 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:17:00,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 22:17:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:00,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 22:17:00,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 22:17:00,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:17:00,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:17:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239313908] [2021-12-18 22:17:00,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239313908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:17:00,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:17:00,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 22:17:00,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363069423] [2021-12-18 22:17:00,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:17:00,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:17:00,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:17:00,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:17:00,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:17:00,864 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:17:00,952 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-12-18 22:17:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:17:00,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-18 22:17:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:17:00,954 INFO L225 Difference]: With dead ends: 68 [2021-12-18 22:17:00,954 INFO L226 Difference]: Without dead ends: 68 [2021-12-18 22:17:00,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:17:00,956 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 73 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:17:00,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 75 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:17:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-18 22:17:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-12-18 22:17:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:17:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-12-18 22:17:00,959 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 46 [2021-12-18 22:17:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:17:00,959 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-12-18 22:17:00,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-12-18 22:17:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 22:17:00,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:17:00,960 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:17:00,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-18 22:17:01,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:17:01,167 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:17:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:17:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 866562379, now seen corresponding path program 1 times [2021-12-18 22:17:01,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:17:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821583125] [2021-12-18 22:17:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:01,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:17:01,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:17:01,169 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:17:01,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 22:17:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:01,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 22:17:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:01,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:17:01,505 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 [2021-12-18 22:17:01,522 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 20 treesize of output 12 [2021-12-18 22:17:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 22:17:01,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:17:01,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:17:01,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821583125] [2021-12-18 22:17:01,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821583125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:17:01,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:17:01,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 22:17:01,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049608564] [2021-12-18 22:17:01,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:17:01,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:17:01,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:17:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:17:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:17:01,548 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:17:01,898 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2021-12-18 22:17:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 22:17:01,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-12-18 22:17:01,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:17:01,899 INFO L225 Difference]: With dead ends: 99 [2021-12-18 22:17:01,899 INFO L226 Difference]: Without dead ends: 99 [2021-12-18 22:17:01,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:17:01,900 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 185 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:17:01,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 194 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 22:17:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-18 22:17:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2021-12-18 22:17:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 63 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:17:01,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-12-18 22:17:01,903 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 49 [2021-12-18 22:17:01,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:17:01,903 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-12-18 22:17:01,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-12-18 22:17:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 22:17:01,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:17:01,904 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:17:01,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 22:17:02,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:17:02,122 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:17:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:17:02,122 INFO L85 PathProgramCache]: Analyzing trace with hash 866562380, now seen corresponding path program 1 times [2021-12-18 22:17:02,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:17:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363743925] [2021-12-18 22:17:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:02,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:17:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:17:02,123 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:17:02,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 22:17:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:02,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 22:17:02,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:02,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:17:02,483 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 [2021-12-18 22:17:02,487 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 [2021-12-18 22:17:02,527 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 17 treesize of output 9 [2021-12-18 22:17:02,532 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 15 treesize of output 7 [2021-12-18 22:17:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 22:17:02,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:17:02,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:17:02,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363743925] [2021-12-18 22:17:02,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363743925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:17:02,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:17:02,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 22:17:02,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985199383] [2021-12-18 22:17:02,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:17:02,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:17:02,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:17:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:17:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:17:02,580 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:17:03,042 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2021-12-18 22:17:03,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 22:17:03,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-12-18 22:17:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:17:03,043 INFO L225 Difference]: With dead ends: 91 [2021-12-18 22:17:03,043 INFO L226 Difference]: Without dead ends: 91 [2021-12-18 22:17:03,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:17:03,044 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 188 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:17:03,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 202 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 22:17:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-18 22:17:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2021-12-18 22:17:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.25) internal successors, (70), 65 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:17:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-12-18 22:17:03,047 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 49 [2021-12-18 22:17:03,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:17:03,047 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-12-18 22:17:03,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:03,048 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-12-18 22:17:03,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 22:17:03,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:17:03,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:17:03,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-18 22:17:03,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:17:03,249 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:17:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:17:03,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1093628647, now seen corresponding path program 1 times [2021-12-18 22:17:03,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:17:03,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699717111] [2021-12-18 22:17:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:03,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:17:03,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:17:03,252 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:17:03,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-18 22:17:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 22:17:03,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:03,532 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 [2021-12-18 22:17:03,548 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 16 treesize of output 8 [2021-12-18 22:17:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 22:17:03,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:17:03,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:17:03,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699717111] [2021-12-18 22:17:03,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699717111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:17:03,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:17:03,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 22:17:03,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084297798] [2021-12-18 22:17:03,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:17:03,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:17:03,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:17:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:17:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:17:03,573 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:17:03,828 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-12-18 22:17:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 22:17:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-18 22:17:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:17:03,829 INFO L225 Difference]: With dead ends: 74 [2021-12-18 22:17:03,829 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 22:17:03,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:17:03,830 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 83 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:17:03,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 275 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:17:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 22:17:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2021-12-18 22:17:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 65 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:17:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-12-18 22:17:03,832 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 50 [2021-12-18 22:17:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:17:03,833 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-12-18 22:17:03,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-12-18 22:17:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 22:17:03,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:17:03,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:17:03,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-18 22:17:04,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:17:04,049 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:17:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:17:04,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1290611022, now seen corresponding path program 1 times [2021-12-18 22:17:04,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:17:04,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989012161] [2021-12-18 22:17:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:04,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:17:04,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:17:04,051 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:17:04,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 22:17:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 22:17:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:04,487 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 [2021-12-18 22:17:04,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:04,692 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 22:17:04,736 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 [2021-12-18 22:17:04,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:04,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 22:17:04,755 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 [2021-12-18 22:17:04,827 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 26 treesize of output 14 [2021-12-18 22:17:04,833 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 15 treesize of output 7 [2021-12-18 22:17:04,975 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 15 treesize of output 7 [2021-12-18 22:17:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 22:17:05,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:17:05,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:17:05,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989012161] [2021-12-18 22:17:05,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989012161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:17:05,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:17:05,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-18 22:17:05,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028881718] [2021-12-18 22:17:05,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:17:05,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 22:17:05,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:17:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 22:17:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:17:05,005 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:17:05,199 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-12-18 22:17:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 22:17:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2021-12-18 22:17:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:17:05,200 INFO L225 Difference]: With dead ends: 72 [2021-12-18 22:17:05,200 INFO L226 Difference]: Without dead ends: 72 [2021-12-18 22:17:05,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-18 22:17:05,201 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:17:05,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 290 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2021-12-18 22:17:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-18 22:17:05,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-18 22:17:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:17:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-12-18 22:17:05,204 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 53 [2021-12-18 22:17:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:17:05,204 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-12-18 22:17:05,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:17:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-12-18 22:17:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 22:17:05,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:17:05,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:17:05,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 22:17:05,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:17:05,415 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:17:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:17:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1354235562, now seen corresponding path program 1 times [2021-12-18 22:17:05,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:17:05,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762585423] [2021-12-18 22:17:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:05,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:17:05,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:17:05,417 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:17:05,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 22:17:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:05,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 22:17:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:05,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:17:05,794 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 6 treesize of output 5 [2021-12-18 22:17:05,894 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 12 treesize of output 8 [2021-12-18 22:17:06,294 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-18 22:17:06,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 24 [2021-12-18 22:17:06,330 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:17:06,330 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 20 treesize of output 26 [2021-12-18 22:17:06,347 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 11 treesize of output 9 [2021-12-18 22:17:06,728 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:17:06,728 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 26 [2021-12-18 22:17:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:06,862 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 0 case distinctions, treesize of input 36 treesize of output 27 [2021-12-18 22:17:06,879 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 [2021-12-18 22:17:06,985 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 15 treesize of output 7 [2021-12-18 22:17:07,251 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:17:07,252 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 27 [2021-12-18 22:17:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:17:07,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:17:08,111 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 88 treesize of output 84 [2021-12-18 22:17:14,303 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 37 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 22:17:21,531 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:17:21,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762585423] [2021-12-18 22:17:21,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762585423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:17:21,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [515748852] [2021-12-18 22:17:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:21,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:17:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:17:21,533 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:17:21,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-18 22:17:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:21,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 22:17:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:21,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:17:22,480 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 12 treesize of output 8 [2021-12-18 22:17:22,799 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:17:22,800 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 19 treesize of output 25 [2021-12-18 22:17:22,818 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 22:17:22,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-12-18 22:17:22,833 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 11 treesize of output 9 [2021-12-18 22:17:23,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:23,445 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-12-18 22:17:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:23,619 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 0 case distinctions, treesize of input 36 treesize of output 27 [2021-12-18 22:17:23,631 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 [2021-12-18 22:17:23,779 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 15 treesize of output 7 [2021-12-18 22:17:24,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:17:24,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 27 [2021-12-18 22:17:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:17:28,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:17:28,891 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 88 treesize of output 84 [2021-12-18 22:17:30,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [515748852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:17:30,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:17:30,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2021-12-18 22:17:30,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054520690] [2021-12-18 22:17:30,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:17:30,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 22:17:30,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:17:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 22:17:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2359, Unknown=6, NotChecked=0, Total=2550 [2021-12-18 22:17:30,888 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 40 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:17:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:17:31,272 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-12-18 22:17:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 22:17:31,273 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2021-12-18 22:17:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:17:31,274 INFO L225 Difference]: With dead ends: 74 [2021-12-18 22:17:31,274 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 22:17:31,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=222, Invalid=2634, Unknown=6, NotChecked=0, Total=2862 [2021-12-18 22:17:31,275 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:17:31,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 465 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 279 Unchecked, 0.1s Time] [2021-12-18 22:17:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 22:17:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-18 22:17:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 68 states have internal predecessors, (74), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:17:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-18 22:17:31,278 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 54 [2021-12-18 22:17:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:17:31,278 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-18 22:17:31,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:17:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-18 22:17:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 22:17:31,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:17:31,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:17:31,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-18 22:17:31,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-12-18 22:17:31,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:17:31,689 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:17:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:17:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1354235561, now seen corresponding path program 1 times [2021-12-18 22:17:31,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:17:31,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505387316] [2021-12-18 22:17:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:31,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:17:31,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:17:31,690 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:17:31,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-18 22:17:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:31,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-18 22:17:31,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:31,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:17:32,127 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 6 treesize of output 5 [2021-12-18 22:17:32,135 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 6 treesize of output 5 [2021-12-18 22:17:32,283 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 9 treesize of output 5 [2021-12-18 22:17:32,287 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 7 treesize of output 3 [2021-12-18 22:17:32,606 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:17:32,606 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 16 treesize of output 22 [2021-12-18 22:17:32,620 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 22:17:32,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 16 [2021-12-18 22:17:32,624 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 7 treesize of output 5 [2021-12-18 22:17:32,662 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:17:32,662 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 14 treesize of output 20 [2021-12-18 22:17:32,669 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 5 treesize of output 3 [2021-12-18 22:17:32,959 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:17:32,960 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 22 [2021-12-18 22:17:32,987 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:17:32,987 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:17:33,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:33,122 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 0 case distinctions, treesize of input 32 treesize of output 23 [2021-12-18 22:17:33,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:33,130 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 0 case distinctions, treesize of input 38 treesize of output 25 [2021-12-18 22:17:33,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:17:33,535 INFO L354 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2021-12-18 22:17:33,536 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 43 [2021-12-18 22:17:33,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:33,556 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:17:33,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 22:17:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:17:34,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:17:49,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:17:49,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505387316] [2021-12-18 22:17:49,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505387316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:17:49,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1294634187] [2021-12-18 22:17:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:17:49,222 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:17:49,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:17:49,223 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:17:49,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-12-18 22:17:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:17:49,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-18 22:17:49,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:17:49,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:17:49,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:17:51,403 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 22 treesize of output 14 [2021-12-18 22:17:51,408 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 7 treesize of output 3 [2021-12-18 22:17:52,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:52,896 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 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 22:17:52,919 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:17:52,920 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 32 [2021-12-18 22:17:52,936 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-12-18 22:17:52,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 16 [2021-12-18 22:17:52,949 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 10 [2021-12-18 22:17:52,997 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:17:52,997 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 14 treesize of output 20 [2021-12-18 22:17:53,002 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 5 treesize of output 3 [2021-12-18 22:17:53,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:53,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:17:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:53,825 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2021-12-18 22:17:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:54,138 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 0 case distinctions, treesize of input 40 treesize of output 27 [2021-12-18 22:17:54,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:54,147 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 0 case distinctions, treesize of input 30 treesize of output 25 [2021-12-18 22:17:55,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:17:55,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:17:55,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 42 [2021-12-18 22:17:55,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:17:55,143 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:17:55,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 22:17:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:17:56,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:18:07,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1294634187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:18:07,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:18:07,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-12-18 22:18:07,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31686361] [2021-12-18 22:18:07,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:18:07,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 22:18:07,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:18:07,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 22:18:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3207, Unknown=12, NotChecked=0, Total=3422 [2021-12-18 22:18:07,976 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 47 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 41 states have internal predecessors, (87), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:18:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:18:12,531 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-12-18 22:18:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 22:18:12,532 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 41 states have internal predecessors, (87), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2021-12-18 22:18:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:18:12,532 INFO L225 Difference]: With dead ends: 74 [2021-12-18 22:18:12,532 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 22:18:12,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=308, Invalid=4789, Unknown=15, NotChecked=0, Total=5112 [2021-12-18 22:18:12,534 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:18:12,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 764 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 299 Unchecked, 0.3s Time] [2021-12-18 22:18:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 22:18:12,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-18 22:18:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 68 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:18:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2021-12-18 22:18:12,536 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 54 [2021-12-18 22:18:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:18:12,537 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2021-12-18 22:18:12,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 41 states have internal predecessors, (87), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:18:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2021-12-18 22:18:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 22:18:12,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:18:12,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-12-18 22:18:12,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-12-18 22:18:12,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-18 22:18:12,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:18:12,944 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:18:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:18:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash 968369212, now seen corresponding path program 1 times [2021-12-18 22:18:12,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:18:12,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683448728] [2021-12-18 22:18:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:18:12,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:18:12,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:18:12,946 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:18:12,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-18 22:18:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:18:13,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 22:18:13,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:18:13,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:18:13,418 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 8 treesize of output 4 [2021-12-18 22:18:13,664 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:18:13,664 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 15 treesize of output 21 [2021-12-18 22:18:13,672 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 6 treesize of output 4 [2021-12-18 22:18:13,914 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:18:13,914 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2021-12-18 22:18:14,013 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 [2021-12-18 22:18:14,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:18:14,023 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 0 case distinctions, treesize of input 31 treesize of output 22 [2021-12-18 22:18:14,099 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 15 treesize of output 7 [2021-12-18 22:18:14,299 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:18:14,299 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-18 22:18:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:18:14,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:18:14,729 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 82 treesize of output 78 [2021-12-18 22:18:21,001 WARN L227 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 33 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 22:18:23,049 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (_ bv0 32) (let ((.cse2 (bvadd |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset| (_ bv4 32)))) (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|) .cse2 |c_ULTIMATE.start_sll_prepend_#t~mem8#1.base|)))) (store .cse1 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) .cse2)))) (or (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_sll_prepend_~head#1.offset|) (= |c_ULTIMATE.start_main_~#s~0#1.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (forall ((v_arrayElimCell_106 (_ BitVec 32))) (not (= (_ bv0 32) (select (let ((.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|) (bvadd |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset| (_ bv4 32)) |c_ULTIMATE.start_sll_prepend_#t~mem8#1.base|)))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|))))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd v_arrayElimCell_106 (_ bv4 32)))))))) is different from false [2021-12-18 22:18:29,292 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (_ bv0 32) (let ((.cse2 (bvadd |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| (_ bv4 32)))) (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse1 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) .cse2)))) (or (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_sll_prepend_~head#1.offset|) (= |c_ULTIMATE.start_main_~#s~0#1.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (forall ((v_arrayElimCell_106 (_ BitVec 32))) (not (= (_ bv0 32) (select (let ((.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) (bvadd |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| (_ bv4 32)) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|))))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd v_arrayElimCell_106 (_ bv4 32)))))))) is different from false [2021-12-18 22:18:30,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:18:30,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683448728] [2021-12-18 22:18:30,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683448728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:18:30,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [116189669] [2021-12-18 22:18:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:18:30,276 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:18:30,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:18:30,277 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:18:30,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-12-18 22:18:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:18:30,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 22:18:30,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:18:31,176 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 8 treesize of output 4 [2021-12-18 22:18:31,321 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:18:31,321 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 15 treesize of output 21 [2021-12-18 22:18:31,329 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 6 treesize of output 4 [2021-12-18 22:18:31,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:18:31,682 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-12-18 22:18:31,842 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 [2021-12-18 22:18:31,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:18:31,851 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 0 case distinctions, treesize of input 31 treesize of output 22 [2021-12-18 22:18:32,003 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 15 treesize of output 7 [2021-12-18 22:18:32,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:18:32,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-18 22:18:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:18:32,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:18:32,484 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 82 treesize of output 78 [2021-12-18 22:18:35,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [116189669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:18:35,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:18:35,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2021-12-18 22:18:35,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785017482] [2021-12-18 22:18:35,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:18:35,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 22:18:35,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:18:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 22:18:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1808, Unknown=14, NotChecked=174, Total=2162 [2021-12-18 22:18:35,475 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 38 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 33 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:18:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:18:36,259 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-18 22:18:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 22:18:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 33 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 55 [2021-12-18 22:18:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:18:36,261 INFO L225 Difference]: With dead ends: 80 [2021-12-18 22:18:36,261 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 22:18:36,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=225, Invalid=2419, Unknown=16, NotChecked=202, Total=2862 [2021-12-18 22:18:36,262 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:18:36,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 691 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 207 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2021-12-18 22:18:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 22:18:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-12-18 22:18:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:18:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-12-18 22:18:36,265 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 55 [2021-12-18 22:18:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:18:36,266 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-12-18 22:18:36,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 33 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:18:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-12-18 22:18:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 22:18:36,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:18:36,267 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:18:36,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-12-18 22:18:36,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-18 22:18:36,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:18:36,672 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:18:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:18:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash -45283592, now seen corresponding path program 1 times [2021-12-18 22:18:36,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:18:36,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546072759] [2021-12-18 22:18:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:18:36,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:18:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:18:36,674 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:18:36,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-18 22:18:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:18:36,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 22:18:36,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:18:37,106 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 6 treesize of output 5 [2021-12-18 22:18:37,209 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 7 treesize of output 3 [2021-12-18 22:18:37,569 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:18:37,569 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 14 treesize of output 20 [2021-12-18 22:18:37,579 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 5 treesize of output 3 [2021-12-18 22:18:37,832 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:18:37,833 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:18:37,941 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 [2021-12-18 22:18:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:18:37,952 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 0 case distinctions, treesize of input 34 treesize of output 25 [2021-12-18 22:18:38,070 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 26 treesize of output 14 [2021-12-18 22:18:38,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:18:38,312 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:18:38,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 22:18:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:18:38,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:18:38,568 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 22 treesize of output 18 [2021-12-18 22:18:39,218 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 140 treesize of output 132 [2021-12-18 22:18:39,262 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 144 treesize of output 136 [2021-12-18 22:19:24,971 WARN L227 SmtUtils]: Spent 45.32s on a formula simplification. DAG size of input: 46 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 22:19:52,623 WARN L227 SmtUtils]: Spent 24.21s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 22:20:41,773 WARN L227 SmtUtils]: Spent 28.14s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 22:20:43,871 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) (bvadd |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| (_ bv4 32)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse11 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse11 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset|))))) (select (select .cse10 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) (bvadd (select (select .cse10 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) (let ((.cse3 (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_sll_prepend_~head#1.offset|)) (.cse4 (bvadd .cse5 (_ bv4 32))) (.cse6 (= |c_ULTIMATE.start_main_~#s~0#1.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (and (or (forall ((v_arrayElimCell_129 (_ BitVec 32))) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) (bvadd |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| (_ bv4 32)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse2 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset|))))) (select (select .cse1 v_arrayElimCell_129) (bvadd (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32))))) (and .cse3 (bvule .cse4 (bvadd .cse5 (_ bv8 32))) .cse6)) (or (forall ((v_arrayElimCell_128 (_ BitVec 32))) (let ((.cse7 (let ((.cse8 (let ((.cse9 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) (bvadd |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| (_ bv4 32)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse9 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse9 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset|))))) (select (select .cse8 v_arrayElimCell_128) (bvadd (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) (bvule .cse7 (bvadd .cse7 (_ bv4 32))))) (and .cse3 (bvule .cse5 .cse4) .cse6))))) is different from false [2021-12-18 22:20:47,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:20:47,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546072759] [2021-12-18 22:20:47,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546072759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:20:47,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [690278529] [2021-12-18 22:20:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:20:47,361 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:20:47,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:20:47,368 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:20:47,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-12-18 22:20:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:20:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-18 22:20:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:20:47,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:20:47,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:20:49,140 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 22 treesize of output 14 [2021-12-18 22:20:49,145 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 7 treesize of output 3 [2021-12-18 22:20:50,181 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:20:50,181 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 32 [2021-12-18 22:20:50,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:50,187 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 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 22:20:50,201 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-12-18 22:20:50,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 16 [2021-12-18 22:20:50,207 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 10 [2021-12-18 22:20:50,252 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:20:50,252 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 14 treesize of output 20 [2021-12-18 22:20:50,262 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 5 treesize of output 3 [2021-12-18 22:20:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:51,035 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:20:51,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:51,047 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2021-12-18 22:20:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:51,382 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 0 case distinctions, treesize of input 40 treesize of output 27 [2021-12-18 22:20:51,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:51,396 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 0 case distinctions, treesize of input 34 treesize of output 25 [2021-12-18 22:20:52,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:20:52,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:20:52,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 42 [2021-12-18 22:20:52,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:52,315 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:20:52,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 22:20:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:20:52,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:21:06,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [690278529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:21:06,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:21:06,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2021-12-18 22:21:06,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167402319] [2021-12-18 22:21:06,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:21:06,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 22:21:06,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:21:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 22:21:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=4502, Unknown=46, NotChecked=136, Total=4970 [2021-12-18 22:21:06,672 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 42 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:21:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:21:09,096 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-12-18 22:21:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 22:21:09,096 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 42 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2021-12-18 22:21:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:21:09,097 INFO L225 Difference]: With dead ends: 79 [2021-12-18 22:21:09,097 INFO L226 Difference]: Without dead ends: 79 [2021-12-18 22:21:09,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 146.6s TimeCoverageRelationStatistics Valid=391, Invalid=5884, Unknown=49, NotChecked=156, Total=6480 [2021-12-18 22:21:09,099 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:21:09,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 643 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 271 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2021-12-18 22:21:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-18 22:21:09,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-12-18 22:21:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:21:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-12-18 22:21:09,102 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 56 [2021-12-18 22:21:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:21:09,102 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-12-18 22:21:09,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 42 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:21:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-12-18 22:21:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 22:21:09,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:21:09,103 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:21:09,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-12-18 22:21:09,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-18 22:21:09,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:21:09,508 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:21:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:21:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash -567858883, now seen corresponding path program 1 times [2021-12-18 22:21:09,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:21:09,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005136524] [2021-12-18 22:21:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:21:09,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:21:09,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:21:09,510 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:21:09,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-18 22:21:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:21:09,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-18 22:21:09,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:21:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:09,883 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 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 22:21:10,062 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:21:10,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 22:21:10,294 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 [2021-12-18 22:21:10,480 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:21:10,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 22:21:10,667 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 6 treesize of output 5 [2021-12-18 22:21:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:10,682 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 22:21:10,692 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 6 treesize of output 5 [2021-12-18 22:21:11,069 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 39 treesize of output 23 [2021-12-18 22:21:11,084 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 7 treesize of output 3 [2021-12-18 22:21:11,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-18 22:21:11,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 22:21:11,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:11,575 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 0 case distinctions, treesize of input 45 treesize of output 41 [2021-12-18 22:21:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:11,599 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 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 22:21:11,642 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-18 22:21:11,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 29 [2021-12-18 22:21:11,699 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:21:11,699 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 14 treesize of output 20 [2021-12-18 22:21:11,715 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 5 treesize of output 3 [2021-12-18 22:21:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:12,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 35 [2021-12-18 22:21:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 22:21:12,254 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:21:12,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:21:12,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:12,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 36 [2021-12-18 22:21:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:12,628 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 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-18 22:21:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:12,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-12-18 22:21:13,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:21:13,352 INFO L354 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2021-12-18 22:21:13,352 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 59 [2021-12-18 22:21:13,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:13,371 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:21:13,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 22:21:14,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:21:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:21:14,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:21:14,768 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1792 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset|))) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_1792) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))))) is different from false [2021-12-18 22:21:14,837 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1792 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1788 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse5 (bvadd |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset| (_ bv4 32)))) (let ((.cse3 (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|) .cse5 |c_ULTIMATE.start_sll_prepend_#t~mem8#1.offset|)))) (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset|)))) (.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|) .cse5 |c_ULTIMATE.start_sll_prepend_#t~mem8#1.base|)))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| v_ArrVal_1788) |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_1792) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))) is different from false [2021-12-18 22:21:14,891 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1792 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1788 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse5 (bvadd |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset| (_ bv4 32)))) (let ((.cse3 (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|) .cse5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset|)))) (.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|) .cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| v_ArrVal_1788) |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_1792) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))) is different from false [2021-12-18 22:21:14,949 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1792 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1788 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse5 (bvadd |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| (_ bv4 32)))) (let ((.cse3 (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset|)))) (.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| v_ArrVal_1788) |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_1792) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))) is different from false [2021-12-18 22:21:16,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:21:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005136524] [2021-12-18 22:21:16,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005136524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:21:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1358937104] [2021-12-18 22:21:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:21:16,682 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:21:16,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:21:16,683 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:21:16,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-12-18 22:21:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:21:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 22:21:17,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:21:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:21:17,778 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 [2021-12-18 22:21:18,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:18,401 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 22:21:19,018 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 31 treesize of output 19 [2021-12-18 22:21:19,023 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 7 treesize of output 3 [2021-12-18 22:21:19,027 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 8 treesize of output 6 [2021-12-18 22:21:19,032 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 7 treesize of output 3 [2021-12-18 22:21:20,000 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:21:20,001 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 14 treesize of output 20 [2021-12-18 22:21:20,008 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 5 treesize of output 3 [2021-12-18 22:21:20,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:20,028 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 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-18 22:21:20,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:20,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 22:21:20,052 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:21:20,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 18 [2021-12-18 22:21:20,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:20,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 31 [2021-12-18 22:21:20,856 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 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 22:21:20,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:20,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:21:21,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:21,427 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 0 case distinctions, treesize of input 49 treesize of output 32 [2021-12-18 22:21:21,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:21,437 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 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-18 22:21:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:21,447 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 0 case distinctions, treesize of input 38 treesize of output 25 [2021-12-18 22:21:22,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:21:22,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:21:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2021-12-18 22:21:22,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:22,336 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:21:22,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 22:21:23,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:21:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:21:23,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:21:23,348 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1892 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset|))) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_1892) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))))) is different from false [2021-12-18 22:21:24,908 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1892 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1889 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse5 (bvadd |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset| (_ bv4 32)))) (let ((.cse3 (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|) .cse5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset|)))) (.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|) .cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| v_ArrVal_1889) |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_1892) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))) is different from false [2021-12-18 22:21:24,967 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1892 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1889 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse5 (bvadd |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| (_ bv4 32)))) (let ((.cse3 (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset|)))) (.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| v_ArrVal_1889) |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_1892) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))) is different from false [2021-12-18 22:21:31,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1358937104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:21:31,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:21:31,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-12-18 22:21:31,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862536859] [2021-12-18 22:21:31,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:21:31,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 22:21:31,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:21:31,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 22:21:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3635, Unknown=89, NotChecked=896, Total=4830 [2021-12-18 22:21:31,101 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 53 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 46 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:21:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:21:35,743 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-12-18 22:21:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 22:21:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 46 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2021-12-18 22:21:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:21:35,744 INFO L225 Difference]: With dead ends: 77 [2021-12-18 22:21:35,744 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 22:21:35,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=358, Invalid=6042, Unknown=108, NotChecked=1148, Total=7656 [2021-12-18 22:21:35,747 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:21:35,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 813 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 228 Invalid, 0 Unknown, 264 Unchecked, 0.4s Time] [2021-12-18 22:21:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 22:21:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-18 22:21:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:21:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-12-18 22:21:35,750 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 58 [2021-12-18 22:21:35,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:21:35,750 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-12-18 22:21:35,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 46 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:21:35,750 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-12-18 22:21:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 22:21:35,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:21:35,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:21:35,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-18 22:21:35,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-12-18 22:21:36,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:21:36,167 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:21:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:21:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash -423755733, now seen corresponding path program 2 times [2021-12-18 22:21:36,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:21:36,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843204453] [2021-12-18 22:21:36,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:21:36,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:21:36,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:21:36,168 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:21:36,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-18 22:21:36,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:21:36,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:21:36,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-18 22:21:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:21:36,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:21:37,117 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:21:37,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 22:21:37,255 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 13 treesize of output 9 [2021-12-18 22:21:37,623 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:21:37,623 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 28 [2021-12-18 22:21:37,629 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 7 treesize of output 3 [2021-12-18 22:21:37,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-18 22:21:38,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:38,100 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:21:38,100 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 55 [2021-12-18 22:21:38,153 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-12-18 22:21:38,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 70 [2021-12-18 22:21:38,223 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:21:38,224 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 14 treesize of output 20 [2021-12-18 22:21:38,230 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 5 treesize of output 3 [2021-12-18 22:21:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:38,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:21:38,759 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:21:38,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 61 [2021-12-18 22:21:38,831 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:21:38,831 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:21:39,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:39,254 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-12-18 22:21:39,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 58 [2021-12-18 22:21:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:39,269 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 0 case distinctions, treesize of input 30 treesize of output 25 [2021-12-18 22:21:40,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:40,037 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:21:40,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2021-12-18 22:21:40,921 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-12-18 22:21:40,921 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 55 [2021-12-18 22:21:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:21:44,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:21:48,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:21:48,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843204453] [2021-12-18 22:21:48,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843204453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:21:48,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1618083545] [2021-12-18 22:21:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:21:48,914 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:21:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:21:48,915 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:21:48,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-18 22:21:49,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:21:49,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:21:49,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-18 22:21:49,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:21:49,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:21:50,156 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:21:50,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 22:21:50,600 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 13 treesize of output 9 [2021-12-18 22:21:51,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:21:51,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 28 [2021-12-18 22:21:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-18 22:21:51,640 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 7 treesize of output 3 [2021-12-18 22:21:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:52,004 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:21:52,004 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 55 [2021-12-18 22:21:52,052 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-12-18 22:21:52,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 70 [2021-12-18 22:21:52,116 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:21:52,117 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 14 treesize of output 20 [2021-12-18 22:21:52,135 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 5 treesize of output 3 [2021-12-18 22:21:53,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:53,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:21:53,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:53,357 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 22:21:53,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 61 [2021-12-18 22:21:53,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:53,409 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:21:54,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:54,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 22:21:54,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 58 [2021-12-18 22:21:54,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:54,175 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 0 case distinctions, treesize of input 30 treesize of output 25 [2021-12-18 22:21:55,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:55,763 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:21:55,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2021-12-18 22:21:58,988 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:21:58,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 55 [2021-12-18 22:22:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:22:00,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:22:01,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1618083545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:22:01,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:22:01,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2021-12-18 22:22:01,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795881814] [2021-12-18 22:22:01,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:22:01,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-18 22:22:01,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:22:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-18 22:22:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=4399, Unknown=10, NotChecked=0, Total=4692 [2021-12-18 22:22:01,882 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 55 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 46 states have internal predecessors, (82), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:22:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:22:02,945 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-12-18 22:22:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 22:22:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 46 states have internal predecessors, (82), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2021-12-18 22:22:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:22:02,947 INFO L225 Difference]: With dead ends: 87 [2021-12-18 22:22:02,947 INFO L226 Difference]: Without dead ends: 87 [2021-12-18 22:22:02,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=359, Invalid=5033, Unknown=10, NotChecked=0, Total=5402 [2021-12-18 22:22:02,949 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:22:02,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 615 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 330 Unchecked, 0.2s Time] [2021-12-18 22:22:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-18 22:22:02,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-18 22:22:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 80 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:22:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-12-18 22:22:02,952 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 59 [2021-12-18 22:22:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:22:02,952 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-12-18 22:22:02,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 46 states have internal predecessors, (82), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:22:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-12-18 22:22:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 22:22:02,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:22:02,953 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:22:02,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-18 22:22:03,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-12-18 22:22:03,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:22:03,359 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:22:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:22:03,360 INFO L85 PathProgramCache]: Analyzing trace with hash -423755732, now seen corresponding path program 2 times [2021-12-18 22:22:03,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:22:03,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325828441] [2021-12-18 22:22:03,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:22:03,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:22:03,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:22:03,362 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:22:03,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-18 22:22:03,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:22:03,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:22:03,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-18 22:22:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:22:03,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:22:03,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:22:04,304 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:22:04,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 22:22:04,329 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:22:04,505 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 13 treesize of output 9 [2021-12-18 22:22:04,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 22:22:05,029 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:22:05,029 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2021-12-18 22:22:05,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:05,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:22:05,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 22:22:05,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-18 22:22:05,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:05,586 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:22:05,586 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 71 [2021-12-18 22:22:05,631 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-18 22:22:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 37 [2021-12-18 22:22:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:05,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:05,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 22:22:05,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 22:22:06,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:06,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:06,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-18 22:22:06,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:06,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:22:06,263 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:22:06,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 54 [2021-12-18 22:22:06,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:06,762 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-12-18 22:22:06,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 51 [2021-12-18 22:22:06,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:06,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:06,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:06,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2021-12-18 22:22:08,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:22:09,049 INFO L354 Elim1Store]: treesize reduction 105, result has 9.5 percent of original size [2021-12-18 22:22:09,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 189 treesize of output 95 [2021-12-18 22:22:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:09,097 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-18 22:22:09,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 29 [2021-12-18 22:22:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:22:10,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:22:34,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:22:34,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325828441] [2021-12-18 22:22:34,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325828441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:22:34,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1956294228] [2021-12-18 22:22:34,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:22:34,673 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:22:34,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:22:34,674 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:22:34,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-18 22:22:35,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:22:35,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:22:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-18 22:22:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:22:35,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:22:35,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:22:36,667 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:22:36,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-12-18 22:22:36,715 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:22:36,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 22:22:37,624 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 13 treesize of output 9 [2021-12-18 22:22:37,638 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 13 treesize of output 9 [2021-12-18 22:22:39,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:22:39,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2021-12-18 22:22:39,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-18 22:22:39,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:39,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:22:39,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 22:22:41,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:41,771 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 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 22:22:41,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:41,832 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:22:41,832 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 71 [2021-12-18 22:22:41,912 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-18 22:22:41,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 37 [2021-12-18 22:22:41,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:41,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 22:22:43,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:43,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:22:43,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:43,557 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 22:22:43,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 54 [2021-12-18 22:22:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:43,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:43,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-18 22:22:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:44,478 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 22:22:44,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 51 [2021-12-18 22:22:44,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:44,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:44,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:44,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-12-18 22:22:48,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:22:48,120 INFO L354 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2021-12-18 22:22:48,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 90 [2021-12-18 22:22:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:48,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:48,160 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-18 22:22:48,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 29 [2021-12-18 22:22:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:22:49,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:23:08,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1956294228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:23:08,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:23:08,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 60 [2021-12-18 22:23:08,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197997721] [2021-12-18 22:23:08,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:23:08,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-18 22:23:08,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:23:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-18 22:23:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=5407, Unknown=21, NotChecked=0, Total=5700 [2021-12-18 22:23:08,557 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 61 states, 58 states have (on average 1.603448275862069) internal successors, (93), 52 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:23:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:23:17,549 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-12-18 22:23:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 22:23:17,550 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 1.603448275862069) internal successors, (93), 52 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2021-12-18 22:23:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:23:17,551 INFO L225 Difference]: With dead ends: 87 [2021-12-18 22:23:17,551 INFO L226 Difference]: Without dead ends: 87 [2021-12-18 22:23:17,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2953 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=466, Invalid=9010, Unknown=30, NotChecked=0, Total=9506 [2021-12-18 22:23:17,553 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 476 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:23:17,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 884 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 0 Unknown, 476 Unchecked, 0.5s Time] [2021-12-18 22:23:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-18 22:23:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-18 22:23:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.2) internal successors, (84), 80 states have internal predecessors, (84), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:23:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-12-18 22:23:17,556 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 59 [2021-12-18 22:23:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:23:17,556 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-12-18 22:23:17,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 1.603448275862069) internal successors, (93), 52 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:23:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-12-18 22:23:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 22:23:17,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:23:17,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:23:17,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-18 22:23:17,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-12-18 22:23:17,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:23:17,958 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:23:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:23:17,958 INFO L85 PathProgramCache]: Analyzing trace with hash -251527161, now seen corresponding path program 2 times [2021-12-18 22:23:17,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:23:17,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379406969] [2021-12-18 22:23:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:23:17,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:23:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:23:17,960 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:23:17,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-18 22:23:18,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:23:18,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:23:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 22:23:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:23:18,801 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 13 treesize of output 9 [2021-12-18 22:23:19,244 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:23:19,244 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 15 [2021-12-18 22:23:19,251 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 7 treesize of output 3 [2021-12-18 22:23:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:19,936 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 22:23:19,937 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-12-18 22:23:20,049 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:23:20,049 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 14 treesize of output 20 [2021-12-18 22:23:20,060 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 5 treesize of output 3 [2021-12-18 22:23:20,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:23:20,705 INFO L354 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2021-12-18 22:23:20,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 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 [2021-12-18 22:23:20,796 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:23:20,796 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:23:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:21,369 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-12-18 22:23:21,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 39 [2021-12-18 22:23:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:21,398 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 0 case distinctions, treesize of input 30 treesize of output 25 [2021-12-18 22:23:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:22,530 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:23:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2021-12-18 22:23:23,682 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-12-18 22:23:23,683 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 32 [2021-12-18 22:23:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:23:24,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:23:28,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:23:28,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379406969] [2021-12-18 22:23:28,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379406969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:23:28,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1677025356] [2021-12-18 22:23:28,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:23:28,358 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:23:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:23:28,359 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:23:28,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-12-18 22:23:28,746 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 22:23:28,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621426163] [2021-12-18 22:23:28,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:23:28,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:23:28,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:23:28,749 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:23:28,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 22:23:28,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 1 [2021-12-18 22:23:29,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:23:29,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:23:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-18 22:23:29,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:23:29,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:23:29,652 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:23:29,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 27 [2021-12-18 22:23:30,815 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:23:30,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 28 [2021-12-18 22:23:31,402 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 13 treesize of output 9 [2021-12-18 22:23:33,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:33,387 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:23:33,387 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 48 [2021-12-18 22:23:33,419 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-18 22:23:33,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 29 [2021-12-18 22:23:33,448 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 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 22:23:34,335 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-12-18 22:23:34,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:23:34,385 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:23:34,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 43 [2021-12-18 22:23:34,817 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-12-18 22:23:34,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 44 [2021-12-18 22:23:34,823 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 0 case distinctions, treesize of input 38 treesize of output 25 [2021-12-18 22:23:35,774 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:23:35,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2021-12-18 22:23:36,651 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-18 22:23:36,652 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 30 [2021-12-18 22:23:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:23:36,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:23:37,095 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2543 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2544 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_93| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_93|))) (not (= (_ bv0 32) (let ((.cse3 (let ((.cse5 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_93| (store v_ArrVal_2544 (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_93| v_ArrVal_2544) |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse5 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse5 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| (_ bv0 32))))) (.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_93| (store v_ArrVal_2543 (_ bv4 32) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_93| v_ArrVal_2543) |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_93|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (bvadd (select (select .cse3 .cse1) .cse2) (_ bv4 32))))))))) is different from false [2021-12-18 22:23:37,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621426163] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:23:37,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:23:37,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 65 [2021-12-18 22:23:37,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408468095] [2021-12-18 22:23:37,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:23:37,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-18 22:23:37,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:23:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-18 22:23:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5436, Unknown=13, NotChecked=148, Total=5852 [2021-12-18 22:23:37,111 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 65 states, 63 states have (on average 1.619047619047619) internal successors, (102), 55 states have internal predecessors, (102), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:23:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:23:43,407 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2021-12-18 22:23:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 22:23:43,408 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 1.619047619047619) internal successors, (102), 55 states have internal predecessors, (102), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 60 [2021-12-18 22:23:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:23:43,409 INFO L225 Difference]: With dead ends: 102 [2021-12-18 22:23:43,409 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 22:23:43,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3300 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=539, Invalid=9752, Unknown=15, NotChecked=200, Total=10506 [2021-12-18 22:23:43,410 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 85 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 22:23:43,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1501 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 507 Invalid, 0 Unknown, 570 Unchecked, 0.8s Time] [2021-12-18 22:23:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 22:23:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2021-12-18 22:23:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 80 states have internal predecessors, (83), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:23:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-12-18 22:23:43,413 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 60 [2021-12-18 22:23:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:23:43,413 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-12-18 22:23:43,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 1.619047619047619) internal successors, (102), 55 states have internal predecessors, (102), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:23:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-12-18 22:23:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 22:23:43,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:23:43,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:23:43,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-18 22:23:43,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-18 22:23:43,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:23:43,836 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:23:43,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:23:43,837 INFO L85 PathProgramCache]: Analyzing trace with hash 792634509, now seen corresponding path program 2 times [2021-12-18 22:23:43,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:23:43,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031015755] [2021-12-18 22:23:43,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:23:43,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:23:43,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:23:43,838 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:23:43,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-18 22:23:44,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:23:44,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:23:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-18 22:23:44,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:23:44,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:23:44,776 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 13 treesize of output 9 [2021-12-18 22:23:45,172 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 31 treesize of output 19 [2021-12-18 22:23:45,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:45,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:23:45,186 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 8 treesize of output 6 [2021-12-18 22:23:45,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:45,668 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 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-18 22:23:45,690 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:23:45,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 22:23:45,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:45,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 22:23:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:46,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 31 [2021-12-18 22:23:46,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:46,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-18 22:23:46,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:46,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 32 [2021-12-18 22:23:46,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:46,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:46,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2021-12-18 22:23:47,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:23:47,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:23:47,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 51 [2021-12-18 22:23:48,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:48,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:23:48,085 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-18 22:23:48,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 29 [2021-12-18 22:23:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:23:48,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:23:48,545 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 22 treesize of output 18 [2021-12-18 22:24:11,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:24:11,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031015755] [2021-12-18 22:24:11,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031015755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:24:11,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031192308] [2021-12-18 22:24:11,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:24:11,180 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:24:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:24:11,181 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:24:11,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-12-18 22:24:11,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:24:11,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:24:11,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 22:24:11,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:24:13,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:24:14,098 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 13 treesize of output 9 [2021-12-18 22:24:14,244 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 31 treesize of output 19 [2021-12-18 22:24:14,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:14,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:24:14,258 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 8 treesize of output 6 [2021-12-18 22:24:15,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:15,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:15,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 22:24:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:15,541 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 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-18 22:24:15,558 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:24:15,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 18 [2021-12-18 22:24:16,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:16,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:16,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-18 22:24:16,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:16,644 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 31 [2021-12-18 22:24:17,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:17,272 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 0 case distinctions, treesize of input 49 treesize of output 32 [2021-12-18 22:24:17,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:17,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:17,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2021-12-18 22:24:18,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:24:18,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:24:18,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2021-12-18 22:24:21,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:21,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:21,156 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-18 22:24:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 29 [2021-12-18 22:24:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:24:21,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:24:21,212 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 22 treesize of output 18 [2021-12-18 22:24:35,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1031192308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:24:35,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:24:35,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 55 [2021-12-18 22:24:35,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293979975] [2021-12-18 22:24:35,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:24:35,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 22:24:35,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:24:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 22:24:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=6686, Unknown=38, NotChecked=0, Total=7140 [2021-12-18 22:24:35,398 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 56 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 48 states have internal predecessors, (91), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 22:24:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:24:39,730 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2021-12-18 22:24:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 22:24:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 48 states have internal predecessors, (91), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 61 [2021-12-18 22:24:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:24:39,731 INFO L225 Difference]: With dead ends: 103 [2021-12-18 22:24:39,731 INFO L226 Difference]: Without dead ends: 103 [2021-12-18 22:24:39,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3696 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=568, Invalid=8703, Unknown=41, NotChecked=0, Total=9312 [2021-12-18 22:24:39,733 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:24:39,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 916 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 186 Invalid, 0 Unknown, 195 Unchecked, 0.4s Time] [2021-12-18 22:24:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-18 22:24:39,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2021-12-18 22:24:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 82 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:24:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-18 22:24:39,739 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 61 [2021-12-18 22:24:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:24:39,740 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-18 22:24:39,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 48 states have internal predecessors, (91), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 22:24:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-18 22:24:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 22:24:39,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:24:39,741 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:24:39,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-12-18 22:24:39,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-12-18 22:24:40,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:24:40,155 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:24:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:24:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1512551826, now seen corresponding path program 2 times [2021-12-18 22:24:40,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:24:40,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262794760] [2021-12-18 22:24:40,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:24:40,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:24:40,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:24:40,157 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:24:40,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-18 22:24:40,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:24:40,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:24:40,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-18 22:24:40,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:24:40,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:24:40,669 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 8 treesize of output 6 [2021-12-18 22:24:40,808 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 [2021-12-18 22:24:40,984 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:24:40,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 22:24:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:41,188 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 22:24:41,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 22:24:41,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-18 22:24:41,894 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:24:41,894 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 14 treesize of output 20 [2021-12-18 22:24:41,906 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 5 treesize of output 3 [2021-12-18 22:24:41,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:41,989 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:24:41,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 39 [2021-12-18 22:24:42,391 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 13 treesize of output 9 [2021-12-18 22:24:42,399 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 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 22:24:42,436 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 13 treesize of output 9 [2021-12-18 22:24:43,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:24:43,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 46 [2021-12-18 22:24:43,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:43,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-12-18 22:24:43,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:43,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:24:43,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 22:24:44,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:44,324 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:24:44,324 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 79 [2021-12-18 22:24:44,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:44,341 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 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-18 22:24:44,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:44,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:44,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:44,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 22:24:44,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:44,420 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-18 22:24:44,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 44 [2021-12-18 22:24:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:45,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:24:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:45,468 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 22:24:45,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 60 [2021-12-18 22:24:45,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:45,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-18 22:24:45,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-18 22:24:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:46,193 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 22:24:46,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 57 [2021-12-18 22:24:46,209 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 0 case distinctions, treesize of input 26 treesize of output 28 [2021-12-18 22:24:46,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:46,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:46,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:46,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-12-18 22:24:49,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:24:49,110 INFO L354 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2021-12-18 22:24:49,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 107 [2021-12-18 22:24:49,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:49,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:24:49,162 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-18 22:24:49,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 36 [2021-12-18 22:24:50,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-18 22:24:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:24:51,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:25:12,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:25:12,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262794760] [2021-12-18 22:25:12,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262794760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:25:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452400226] [2021-12-18 22:25:12,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:25:12,780 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:25:12,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:25:12,781 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:25:12,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-12-18 22:25:13,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:25:13,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:25:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-18 22:25:13,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:25:14,187 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 [2021-12-18 22:25:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:15,497 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 22:25:15,905 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 7 treesize of output 3 [2021-12-18 22:25:16,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:25:16,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:25:17,702 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:25:17,703 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 14 treesize of output 20 [2021-12-18 22:25:17,718 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 5 treesize of output 3 [2021-12-18 22:25:18,658 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 13 treesize of output 9 [2021-12-18 22:25:18,695 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-12-18 22:25:18,696 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 42 [2021-12-18 22:25:18,762 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 13 treesize of output 9 [2021-12-18 22:25:20,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:25:20,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 41 [2021-12-18 22:25:20,842 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 11 treesize of output 7 [2021-12-18 22:25:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:20,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:25:20,862 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 8 treesize of output 6 [2021-12-18 22:25:20,868 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 5 treesize of output 3 [2021-12-18 22:25:22,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2021-12-18 22:25:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:23,227 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:25:23,229 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 74 [2021-12-18 22:25:23,277 INFO L354 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2021-12-18 22:25:23,278 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 38 treesize of output 52 [2021-12-18 22:25:23,303 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:25:23,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 18 [2021-12-18 22:25:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:23,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 22:25:23,341 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 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 22:25:25,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:25,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:25:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:25,448 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 22:25:25,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 60 [2021-12-18 22:25:25,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:25,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:25,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-18 22:25:25,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:25,494 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-18 22:25:25,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2021-12-18 22:25:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:27,105 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 22:25:27,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 61 [2021-12-18 22:25:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:27,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:27,131 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-12-18 22:25:27,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 66 [2021-12-18 22:25:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:27,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-12-18 22:25:32,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:25:32,808 INFO L354 Elim1Store]: treesize reduction 75, result has 8.5 percent of original size [2021-12-18 22:25:32,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 195 treesize of output 87 [2021-12-18 22:25:32,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:25:32,849 INFO L354 Elim1Store]: treesize reduction 12, result has 36.8 percent of original size [2021-12-18 22:25:32,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 27 [2021-12-18 22:25:41,940 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-18 22:25:41,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 13 [2021-12-18 22:25:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:25:41,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:26:03,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:26:03,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 816 treesize of output 816 [2021-12-18 22:26:49,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1452400226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:26:49,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:26:49,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 41] total 77 [2021-12-18 22:26:49,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560997787] [2021-12-18 22:26:49,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:26:49,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-18 22:26:49,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:26:49,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-18 22:26:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=11329, Unknown=77, NotChecked=0, Total=11772 [2021-12-18 22:26:49,281 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 77 states, 75 states have (on average 1.48) internal successors, (111), 65 states have internal predecessors, (111), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:27:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:27:24,687 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-12-18 22:27:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 22:27:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 1.48) internal successors, (111), 65 states have internal predecessors, (111), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 63 [2021-12-18 22:27:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:27:24,689 INFO L225 Difference]: With dead ends: 128 [2021-12-18 22:27:24,689 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 22:27:24,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4045 ImplicationChecksByTransitivity, 146.7s TimeCoverageRelationStatistics Valid=631, Invalid=18738, Unknown=91, NotChecked=0, Total=19460 [2021-12-18 22:27:24,691 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 822 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:27:24,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 2100 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 614 Invalid, 0 Unknown, 822 Unchecked, 1.5s Time] [2021-12-18 22:27:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 22:27:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-18 22:27:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 118 states have internal predecessors, (122), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:27:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2021-12-18 22:27:24,695 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 63 [2021-12-18 22:27:24,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:27:24,695 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2021-12-18 22:27:24,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 1.48) internal successors, (111), 65 states have internal predecessors, (111), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:27:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2021-12-18 22:27:24,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 22:27:24,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:27:24,696 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:27:24,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-12-18 22:27:24,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-12-18 22:27:25,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:27:25,099 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:27:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:27:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash -355533194, now seen corresponding path program 3 times [2021-12-18 22:27:25,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:27:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625152533] [2021-12-18 22:27:25,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 22:27:25,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:27:25,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:27:25,101 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:27:25,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-18 22:27:25,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 22:27:25,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:27:25,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-18 22:27:25,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:27:25,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:27:25,688 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 8 treesize of output 6 [2021-12-18 22:27:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:25,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 20 treesize of output 20 [2021-12-18 22:27:26,111 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 13 treesize of output 9 [2021-12-18 22:27:26,124 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 13 treesize of output 9 [2021-12-18 22:27:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:26,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-18 22:27:26,383 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 7 treesize of output 3 [2021-12-18 22:27:26,388 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 7 treesize of output 3 [2021-12-18 22:27:26,987 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:27:26,987 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 16 treesize of output 22 [2021-12-18 22:27:26,997 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 7 treesize of output 3 [2021-12-18 22:27:27,050 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:27:27,050 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 16 treesize of output 22 [2021-12-18 22:27:27,065 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 7 treesize of output 3 [2021-12-18 22:27:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:27,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:27,136 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:27:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2021-12-18 22:27:27,452 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 22:27:27,459 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 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-18 22:27:28,244 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-18 22:27:28,245 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 51 [2021-12-18 22:27:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:28,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:28,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-18 22:27:28,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:28,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-12-18 22:27:29,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:29,302 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-18 22:27:29,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 93 [2021-12-18 22:27:29,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:29,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:29,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:29,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:29,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:29,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2021-12-18 22:27:29,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:29,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:29,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:29,397 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-18 22:27:29,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 43 [2021-12-18 22:27:30,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:30,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:30,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:30,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2021-12-18 22:27:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:30,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:27:30,736 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-12-18 22:27:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 113 treesize of output 72 [2021-12-18 22:27:31,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:31,560 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-12-18 22:27:31,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 110 treesize of output 69 [2021-12-18 22:27:31,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:31,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:31,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:31,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-12-18 22:27:41,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:27:41,844 INFO L354 Elim1Store]: treesize reduction 228, result has 5.8 percent of original size [2021-12-18 22:27:41,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 296 treesize of output 134 [2021-12-18 22:27:41,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:41,933 INFO L354 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2021-12-18 22:27:41,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 40 [2021-12-18 22:27:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:27:42,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:27:54,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:27:54,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625152533] [2021-12-18 22:27:54,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625152533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:27:54,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [502848413] [2021-12-18 22:27:54,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 22:27:54,892 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:27:54,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:27:54,895 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:27:54,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-18 22:27:55,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 22:27:55,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:27:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 134 conjunts are in the unsatisfiable core [2021-12-18 22:27:55,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:27:55,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:27:55,858 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 5 treesize of output 3 [2021-12-18 22:27:56,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:27:56,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:27:56,940 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:27:57,728 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 13 treesize of output 9 [2021-12-18 22:27:57,736 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 13 treesize of output 9 [2021-12-18 22:27:58,629 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 8 treesize of output 6 [2021-12-18 22:27:58,637 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 7 treesize of output 3 [2021-12-18 22:27:58,642 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 7 treesize of output 3 [2021-12-18 22:27:58,660 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 5 treesize of output 3 [2021-12-18 22:28:01,189 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:28:01,189 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 16 treesize of output 22 [2021-12-18 22:28:01,198 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 7 treesize of output 3 [2021-12-18 22:28:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:01,232 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:28:01,277 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:28:01,277 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 16 treesize of output 22 [2021-12-18 22:28:01,295 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 7 treesize of output 3 [2021-12-18 22:28:01,365 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:28:01,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 22:28:02,404 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 22:28:02,410 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 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-18 22:28:04,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 22:28:04,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 51 [2021-12-18 22:28:04,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:04,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:04,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-18 22:28:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-18 22:28:04,738 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 5 treesize of output 3 [2021-12-18 22:28:08,363 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:28:08,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-12-18 22:28:08,475 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-12-18 22:28:08,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 70 [2021-12-18 22:28:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:08,550 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-18 22:28:08,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 133 treesize of output 107 [2021-12-18 22:28:08,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:08,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:08,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:08,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2021-12-18 22:28:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:11,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:28:11,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:11,933 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-18 22:28:11,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 144 treesize of output 91 [2021-12-18 22:28:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:11,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:11,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:11,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2021-12-18 22:28:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:13,503 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-18 22:28:13,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 88 [2021-12-18 22:28:13,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:13,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:13,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:13,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-12-18 22:28:31,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:28:31,257 INFO L354 Elim1Store]: treesize reduction 186, result has 7.0 percent of original size [2021-12-18 22:28:31,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 285 treesize of output 139 [2021-12-18 22:28:31,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:31,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:31,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:31,353 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-12-18 22:28:31,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 38 [2021-12-18 22:28:33,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:33,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:28:33,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-18 22:28:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:28:35,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:29:14,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [502848413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:29:14,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:29:14,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 79 [2021-12-18 22:29:14,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162893415] [2021-12-18 22:29:14,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:29:14,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 22:29:14,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:29:14,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 22:29:14,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=11983, Unknown=40, NotChecked=0, Total=12432 [2021-12-18 22:29:14,289 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 79 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 67 states have internal predecessors, (114), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:29:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:29:24,504 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-12-18 22:29:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 22:29:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 67 states have internal predecessors, (114), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 64 [2021-12-18 22:29:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:29:24,506 INFO L225 Difference]: With dead ends: 136 [2021-12-18 22:29:24,506 INFO L226 Difference]: Without dead ends: 136 [2021-12-18 22:29:24,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 88.8s TimeCoverageRelationStatistics Valid=515, Invalid=15189, Unknown=46, NotChecked=0, Total=15750 [2021-12-18 22:29:24,508 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 24 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 737 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 22:29:24,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1721 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 615 Invalid, 0 Unknown, 737 Unchecked, 1.6s Time] [2021-12-18 22:29:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-18 22:29:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-12-18 22:29:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 125 states have internal predecessors, (129), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:29:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2021-12-18 22:29:24,512 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 64 [2021-12-18 22:29:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:29:24,513 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2021-12-18 22:29:24,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 67 states have internal predecessors, (114), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:29:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2021-12-18 22:29:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 22:29:24,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:29:24,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:29:24,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-12-18 22:29:24,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-18 22:29:24,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:29:24,920 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:29:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:29:24,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1863371548, now seen corresponding path program 3 times [2021-12-18 22:29:24,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:29:24,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41982362] [2021-12-18 22:29:24,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 22:29:24,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:29:24,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:29:24,921 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:29:24,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-18 22:29:25,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 22:29:25,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:29:25,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 22:29:25,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:29:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 22:29:25,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:29:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 22:29:25,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:29:25,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41982362] [2021-12-18 22:29:25,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41982362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:29:25,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:29:25,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-18 22:29:25,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6500263] [2021-12-18 22:29:25,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:29:25,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 22:29:25,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:29:25,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 22:29:25,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 22:29:25,921 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 22:29:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:29:26,007 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2021-12-18 22:29:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:29:26,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2021-12-18 22:29:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:29:26,008 INFO L225 Difference]: With dead ends: 150 [2021-12-18 22:29:26,008 INFO L226 Difference]: Without dead ends: 150 [2021-12-18 22:29:26,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 22:29:26,009 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 58 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:29:26,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 399 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:29:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-18 22:29:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2021-12-18 22:29:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 128 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:29:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 146 transitions. [2021-12-18 22:29:26,013 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 146 transitions. Word has length 65 [2021-12-18 22:29:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:29:26,013 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 146 transitions. [2021-12-18 22:29:26,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 22:29:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 146 transitions. [2021-12-18 22:29:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 22:29:26,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:29:26,014 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:29:26,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-12-18 22:29:26,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:29:26,219 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:29:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:29:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash -749426673, now seen corresponding path program 1 times [2021-12-18 22:29:26,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:29:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681527878] [2021-12-18 22:29:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:29:26,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:29:26,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:29:26,221 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:29:26,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-18 22:29:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:29:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 22:29:26,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:29:26,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:29:26,705 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 [2021-12-18 22:29:26,813 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 20 treesize of output 12 [2021-12-18 22:29:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 22:29:26,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:29:26,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:29:26,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681527878] [2021-12-18 22:29:26,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681527878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:29:26,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:29:26,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 22:29:26,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989455506] [2021-12-18 22:29:26,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:29:26,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:29:26,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:29:26,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:29:26,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:29:26,865 INFO L87 Difference]: Start difference. First operand 139 states and 146 transitions. Second operand has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:29:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:29:27,472 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-12-18 22:29:27,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 22:29:27,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2021-12-18 22:29:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:29:27,474 INFO L225 Difference]: With dead ends: 148 [2021-12-18 22:29:27,474 INFO L226 Difference]: Without dead ends: 148 [2021-12-18 22:29:27,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-18 22:29:27,475 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:29:27,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 206 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 22:29:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-18 22:29:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2021-12-18 22:29:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 129 states have internal predecessors, (137), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:29:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2021-12-18 22:29:27,479 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 68 [2021-12-18 22:29:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:29:27,479 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2021-12-18 22:29:27,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:29:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2021-12-18 22:29:27,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 22:29:27,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:29:27,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:29:27,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-12-18 22:29:27,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:29:27,687 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:29:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:29:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash -749426672, now seen corresponding path program 1 times [2021-12-18 22:29:27,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:29:27,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153141376] [2021-12-18 22:29:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:29:27,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:29:27,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:29:27,689 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:29:27,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-18 22:29:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:29:27,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 22:29:27,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:29:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:29:28,239 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 [2021-12-18 22:29:28,247 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 [2021-12-18 22:29:28,436 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 17 treesize of output 9 [2021-12-18 22:29:28,441 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 15 treesize of output 7 [2021-12-18 22:29:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 22:29:28,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:29:28,518 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:29:28,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153141376] [2021-12-18 22:29:28,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153141376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:29:28,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:29:28,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 22:29:28,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709255464] [2021-12-18 22:29:28,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:29:28,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:29:28,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:29:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:29:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:29:28,520 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:29:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:29:29,123 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2021-12-18 22:29:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 22:29:29,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2021-12-18 22:29:29,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:29:29,125 INFO L225 Difference]: With dead ends: 148 [2021-12-18 22:29:29,125 INFO L226 Difference]: Without dead ends: 148 [2021-12-18 22:29:29,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:29:29,126 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 94 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:29:29,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 179 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 22:29:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-18 22:29:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2021-12-18 22:29:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 131 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:29:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2021-12-18 22:29:29,130 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 68 [2021-12-18 22:29:29,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:29:29,130 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2021-12-18 22:29:29,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:29:29,130 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2021-12-18 22:29:29,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-18 22:29:29,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:29:29,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:29:29,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-18 22:29:29,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:29:29,344 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:29:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:29:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1757391830, now seen corresponding path program 1 times [2021-12-18 22:29:29,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:29:29,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284067032] [2021-12-18 22:29:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:29:29,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:29:29,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:29:29,346 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:29:29,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-18 22:29:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:29:29,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 22:29:29,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:29:29,800 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 [2021-12-18 22:29:29,904 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 16 treesize of output 8 [2021-12-18 22:29:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 22:29:29,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:29:29,952 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:29:29,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284067032] [2021-12-18 22:29:29,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284067032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:29:29,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:29:29,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 22:29:29,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517579666] [2021-12-18 22:29:29,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:29:29,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:29:29,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:29:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:29:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:29:29,953 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:29:30,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:29:30,320 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2021-12-18 22:29:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 22:29:30,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2021-12-18 22:29:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:29:30,321 INFO L225 Difference]: With dead ends: 145 [2021-12-18 22:29:30,321 INFO L226 Difference]: Without dead ends: 145 [2021-12-18 22:29:30,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:29:30,322 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 126 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:29:30,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 226 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 22:29:30,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-18 22:29:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2021-12-18 22:29:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 122 states have (on average 1.1229508196721312) internal successors, (137), 131 states have internal predecessors, (137), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:29:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-12-18 22:29:30,324 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 69 [2021-12-18 22:29:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:29:30,325 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-12-18 22:29:30,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:29:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-12-18 22:29:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-18 22:29:30,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:29:30,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-12-18 22:29:30,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-12-18 22:29:30,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:29:30,526 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:29:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:29:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -929953077, now seen corresponding path program 1 times [2021-12-18 22:29:30,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:29:30,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879551838] [2021-12-18 22:29:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:29:30,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:29:30,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:29:30,527 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:29:30,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-18 22:29:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:29:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 22:29:30,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:29:31,397 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 [2021-12-18 22:29:31,685 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 15 treesize of output 7 [2021-12-18 22:29:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-18 22:29:31,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:29:31,818 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:29:31,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879551838] [2021-12-18 22:29:31,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879551838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:29:31,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:29:31,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 22:29:31,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952475172] [2021-12-18 22:29:31,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:29:31,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 22:29:31,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:29:31,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 22:29:31,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-18 22:29:31,819 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 12 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:29:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:29:31,831 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2021-12-18 22:29:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:29:31,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2021-12-18 22:29:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:29:31,835 INFO L225 Difference]: With dead ends: 143 [2021-12-18 22:29:31,835 INFO L226 Difference]: Without dead ends: 143 [2021-12-18 22:29:31,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-18 22:29:31,835 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 49 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:29:31,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 248 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 66 Unchecked, 0.0s Time] [2021-12-18 22:29:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-18 22:29:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-12-18 22:29:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 123 states have (on average 1.1219512195121952) internal successors, (138), 132 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:29:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 150 transitions. [2021-12-18 22:29:31,839 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 150 transitions. Word has length 71 [2021-12-18 22:29:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:29:31,841 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 150 transitions. [2021-12-18 22:29:31,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:29:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 150 transitions. [2021-12-18 22:29:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-18 22:29:31,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:29:31,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-12-18 22:29:31,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-12-18 22:29:32,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:29:32,043 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-12-18 22:29:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:29:32,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1692934892, now seen corresponding path program 1 times [2021-12-18 22:29:32,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:29:32,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412209223] [2021-12-18 22:29:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:29:32,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:29:32,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:29:32,044 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:29:32,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-18 22:29:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:29:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 22:29:32,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:29:32,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:29:32,652 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 6 treesize of output 5 [2021-12-18 22:29:32,779 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 12 treesize of output 8 [2021-12-18 22:29:33,169 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-18 22:29:33,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-18 22:29:33,192 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:29:33,192 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 32 [2021-12-18 22:29:33,203 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 18 treesize of output 14 [2021-12-18 22:29:33,552 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:29:33,552 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 30 [2021-12-18 22:29:33,700 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 11 treesize of output 7 [2021-12-18 22:29:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:29:33,713 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 0 case distinctions, treesize of input 44 treesize of output 31 [2021-12-18 22:29:34,743 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 15 treesize of output 7 [2021-12-18 22:29:35,059 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-12-18 22:29:35,059 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 29 [2021-12-18 22:29:35,296 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 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 22:29:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 22:29:35,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:29:37,028 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 212 treesize of output 204 [2021-12-18 22:30:06,186 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:30:06,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412209223] [2021-12-18 22:30:06,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412209223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:30:06,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1383642824] [2021-12-18 22:30:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:30:06,189 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:30:06,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:30:06,190 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:30:06,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-12-18 22:30:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:30:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 22:30:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:30:06,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-18 22:30:07,557 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 [2021-12-18 22:30:09,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:30:09,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 80 treesize of output 68 [2021-12-18 22:30:12,666 INFO L354 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2021-12-18 22:30:12,666 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 201 treesize of output 133 [2021-12-18 22:30:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:30:24,176 INFO L354 Elim1Store]: treesize reduction 89, result has 32.1 percent of original size [2021-12-18 22:30:24,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 103 [2021-12-18 22:30:25,261 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 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 22:30:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 22:30:25,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15