./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_append_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_append_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 f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 22:09:01,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 22:09:01,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 22:09:01,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 22:09:01,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 22:09:01,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 22:09:01,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 22:09:01,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 22:09:01,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 22:09:01,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 22:09:01,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 22:09:01,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 22:09:01,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 22:09:01,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 22:09:01,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 22:09:01,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 22:09:01,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 22:09:01,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 22:09:01,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 22:09:01,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 22:09:01,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 22:09:01,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 22:09:01,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 22:09:01,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 22:09:01,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 22:09:01,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 22:09:01,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 22:09:01,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 22:09:01,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 22:09:01,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 22:09:01,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 22:09:01,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 22:09:01,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 22:09:01,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 22:09:01,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 22:09:01,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 22:09:01,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 22:09:01,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 22:09:01,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 22:09:01,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 22:09:01,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 22:09:01,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 22:09:01,829 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 22:09:01,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 22:09:01,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 22:09:01,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 22:09:01,830 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 22:09:01,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 22:09:01,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 22:09:01,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 22:09:01,832 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 22:09:01,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 22:09:01,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 22:09:01,833 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 22:09:01,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 22:09:01,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 22:09:01,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 22:09:01,833 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 22:09:01,833 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 22:09:01,834 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 22:09:01,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 22:09:01,834 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 22:09:01,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 22:09:01,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 22:09:01,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 22:09:01,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 22:09:01,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 22:09:01,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:09:01,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 22:09:01,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 22:09:01,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 22:09:01,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 22:09:01,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 22:09:01,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2021-12-18 22:09:02,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 22:09:02,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 22:09:02,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 22:09:02,055 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 22:09:02,056 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 22:09:02,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2021-12-18 22:09:02,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e50becd71/65ebd4680b67437f86bc26294338d474/FLAG20102711e [2021-12-18 22:09:02,442 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 22:09:02,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2021-12-18 22:09:02,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e50becd71/65ebd4680b67437f86bc26294338d474/FLAG20102711e [2021-12-18 22:09:02,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e50becd71/65ebd4680b67437f86bc26294338d474 [2021-12-18 22:09:02,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 22:09:02,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 22:09:02,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 22:09:02,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 22:09:02,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 22:09:02,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:09:02" (1/1) ... [2021-12-18 22:09:02,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c6cad3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:02, skipping insertion in model container [2021-12-18 22:09:02,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:09:02" (1/1) ... [2021-12-18 22:09:02,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 22:09:02,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 22:09:03,126 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_append_equal.i[24197,24210] [2021-12-18 22:09:03,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:09:03,142 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 22:09:03,182 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_append_equal.i[24197,24210] [2021-12-18 22:09:03,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:09:03,206 INFO L208 MainTranslator]: Completed translation [2021-12-18 22:09:03,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03 WrapperNode [2021-12-18 22:09:03,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 22:09:03,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 22:09:03,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 22:09:03,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 22:09:03,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,256 INFO L137 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 121 [2021-12-18 22:09:03,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 22:09:03,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 22:09:03,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 22:09:03,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 22:09:03,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 22:09:03,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 22:09:03,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 22:09:03,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 22:09:03,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (1/1) ... [2021-12-18 22:09:03,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:09:03,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:09:03,336 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 22:09:03,339 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 22:09:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 22:09:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 22:09:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-18 22:09:03,373 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-18 22:09:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 22:09:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 22:09:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 22:09:03,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 22:09:03,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 22:09:03,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 22:09:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 22:09:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 22:09:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 22:09:03,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 22:09:03,478 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 22:09:03,479 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 22:09:03,750 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 22:09:03,768 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 22:09:03,768 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 22:09:03,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:09:03 BoogieIcfgContainer [2021-12-18 22:09:03,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 22:09:03,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 22:09:03,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 22:09:03,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 22:09:03,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 10:09:02" (1/3) ... [2021-12-18 22:09:03,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d47b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:09:03, skipping insertion in model container [2021-12-18 22:09:03,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:03" (2/3) ... [2021-12-18 22:09:03,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d47b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:09:03, skipping insertion in model container [2021-12-18 22:09:03,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:09:03" (3/3) ... [2021-12-18 22:09:03,777 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2021-12-18 22:09:03,784 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 22:09:03,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2021-12-18 22:09:03,832 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 22:09:03,839 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 22:09:03,839 INFO L340 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2021-12-18 22:09:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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 22:09:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:09:03,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:03,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:03,866 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904761, now seen corresponding path program 1 times [2021-12-18 22:09:03,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:09:03,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570300186] [2021-12-18 22:09:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:03,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:09:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:04,035 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 22:09:04,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:09:04,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570300186] [2021-12-18 22:09:04,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570300186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:04,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:04,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:09:04,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739317665] [2021-12-18 22:09:04,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:04,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:09:04,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:09:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:09:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:09:04,069 INFO L87 Difference]: Start difference. First operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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 22:09:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:04,157 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2021-12-18 22:09:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:09:04,159 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 22:09:04,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:04,165 INFO L225 Difference]: With dead ends: 83 [2021-12-18 22:09:04,166 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 22:09:04,167 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 22:09:04,170 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:04,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 22:09:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-18 22:09:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 76 states have internal predecessors, (82), 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 22:09:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-12-18 22:09:04,199 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 7 [2021-12-18 22:09:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:04,200 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-12-18 22:09:04,200 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 22:09:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-12-18 22:09:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:09:04,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:04,201 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:04,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 22:09:04,201 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904762, now seen corresponding path program 1 times [2021-12-18 22:09:04,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:09:04,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004047721] [2021-12-18 22:09:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:04,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:09:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:04,238 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 22:09:04,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:09:04,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004047721] [2021-12-18 22:09:04,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004047721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:04,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:04,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:09:04,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458493916] [2021-12-18 22:09:04,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:04,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:09:04,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:09:04,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:09:04,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:09:04,241 INFO L87 Difference]: Start difference. First operand 80 states and 86 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 22:09:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:04,306 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-12-18 22:09:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:09:04,307 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 22:09:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:04,308 INFO L225 Difference]: With dead ends: 78 [2021-12-18 22:09:04,308 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 22:09:04,309 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 22:09:04,309 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:04,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 22:09:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-18 22:09:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 74 states have internal predecessors, (80), 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 22:09:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-12-18 22:09:04,317 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 7 [2021-12-18 22:09:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:04,317 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-12-18 22:09:04,317 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 22:09:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-12-18 22:09:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 22:09:04,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:04,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:04,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 22:09:04,318 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:04,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810752, now seen corresponding path program 1 times [2021-12-18 22:09:04,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:09:04,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003775723] [2021-12-18 22:09:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:04,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:09:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:04,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 22:09:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:04,447 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 22:09:04,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:09:04,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003775723] [2021-12-18 22:09:04,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003775723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:04,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:04,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 22:09:04,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012135065] [2021-12-18 22:09:04,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:04,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 22:09:04,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:09:04,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 22:09:04,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:09:04,451 INFO L87 Difference]: Start difference. First operand 78 states and 84 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 22:09:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:04,624 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-12-18 22:09:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:09:04,625 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 22:09:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:04,627 INFO L225 Difference]: With dead ends: 82 [2021-12-18 22:09:04,627 INFO L226 Difference]: Without dead ends: 82 [2021-12-18 22:09:04,627 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 22:09:04,628 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:04,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 300 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-18 22:09:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-12-18 22:09:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 73 states have internal predecessors, (79), 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 22:09:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-12-18 22:09:04,635 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 13 [2021-12-18 22:09:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:04,635 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-12-18 22:09:04,636 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 22:09:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-12-18 22:09:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 22:09:04,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:04,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:04,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 22:09:04,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:04,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810753, now seen corresponding path program 1 times [2021-12-18 22:09:04,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:09:04,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731204283] [2021-12-18 22:09:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:04,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:09:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:04,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 22:09:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:04,771 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 22:09:04,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:09:04,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731204283] [2021-12-18 22:09:04,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731204283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:04,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:04,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 22:09:04,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67306164] [2021-12-18 22:09:04,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:04,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 22:09:04,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:09:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 22:09:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:09:04,773 INFO L87 Difference]: Start difference. First operand 77 states and 83 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 22:09:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:04,913 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-12-18 22:09:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:09:04,914 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 22:09:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:04,915 INFO L225 Difference]: With dead ends: 81 [2021-12-18 22:09:04,915 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 22:09:04,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 22:09:04,916 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 9 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:04,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 22:09:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-12-18 22:09:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 72 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 22:09:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-18 22:09:04,921 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 13 [2021-12-18 22:09:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:04,921 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-18 22:09:04,921 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 22:09:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-18 22:09:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 22:09:04,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:04,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:04,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 22:09:04,922 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1399608384, now seen corresponding path program 1 times [2021-12-18 22:09:04,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:09:04,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811531205] [2021-12-18 22:09:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:04,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:09:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:04,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-18 22:09:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:04,963 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 22:09:04,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:09:04,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811531205] [2021-12-18 22:09:04,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811531205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:04,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:04,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 22:09:04,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207633191] [2021-12-18 22:09:04,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:04,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 22:09:04,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:09:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 22:09:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:09:04,965 INFO L87 Difference]: Start difference. First operand 76 states and 82 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 22:09:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:05,009 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-12-18 22:09:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 22:09:05,010 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 22:09:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:05,011 INFO L225 Difference]: With dead ends: 82 [2021-12-18 22:09:05,011 INFO L226 Difference]: Without dead ends: 82 [2021-12-18 22:09:05,011 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 22:09:05,012 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:05,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 192 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:09:05,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-18 22:09:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-12-18 22:09:05,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 73 states have internal predecessors, (79), 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 22:09:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-12-18 22:09:05,016 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 15 [2021-12-18 22:09:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:05,017 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-12-18 22:09:05,017 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 22:09:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-12-18 22:09:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 22:09:05,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:05,018 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 22:09:05,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 22:09:05,018 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:05,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:05,019 INFO L85 PathProgramCache]: Analyzing trace with hash -898428094, now seen corresponding path program 1 times [2021-12-18 22:09:05,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:09:05,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011094303] [2021-12-18 22:09:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:05,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:09:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:05,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 22:09:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:05,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 22:09:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:05,099 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 22:09:05,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:09:05,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011094303] [2021-12-18 22:09:05,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011094303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:09:05,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195348689] [2021-12-18 22:09:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:05,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:09:05,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:09:05,102 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 22:09:05,103 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 22:09:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:05,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:09:05,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:05,256 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 22:09:05,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:05,345 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 22:09:05,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195348689] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:09:05,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:09:05,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-12-18 22:09:05,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248201319] [2021-12-18 22:09:05,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:09:05,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:09:05,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:09:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:09:05,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:09:05,347 INFO L87 Difference]: Start difference. First operand 77 states and 83 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 22:09:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:05,423 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2021-12-18 22:09:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:09:05,424 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 22:09:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:05,425 INFO L225 Difference]: With dead ends: 83 [2021-12-18 22:09:05,425 INFO L226 Difference]: Without dead ends: 83 [2021-12-18 22:09:05,425 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 22:09:05,426 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 8 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:05,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-18 22:09:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-18 22:09:05,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.6153846153846154) internal successors, (84), 78 states have internal predecessors, (84), 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 22:09:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-12-18 22:09:05,430 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 28 [2021-12-18 22:09:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:05,431 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-12-18 22:09:05,431 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 22:09:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-12-18 22:09:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 22:09:05,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:05,432 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 22:09:05,463 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 22:09:05,660 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 22:09:05,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:05,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186176, now seen corresponding path program 2 times [2021-12-18 22:09:05,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:09:05,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602594564] [2021-12-18 22:09:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:05,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:09:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 22:09:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:05,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 22:09:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:05,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-18 22:09:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:05,925 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 22:09:05,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:09:05,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602594564] [2021-12-18 22:09:05,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602594564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:09:05,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100478193] [2021-12-18 22:09:05,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:09:05,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:09:05,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:09:05,927 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 22:09:05,929 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 22:09:06,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:09:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:09:06,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 22:09:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:06,055 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 22:09:06,083 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 22:09:06,243 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 23151 column 46: unknown constant v_#valid_BEFORE_CALL_2 [2021-12-18 22:09:06,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 22:09:06,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-18 22:09:06,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892013690] [2021-12-18 22:09:06,244 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 22:09:06,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:09:06,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:09:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:09:06,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 22:09:06,245 INFO L87 Difference]: Start difference. First operand 83 states and 90 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 22:09:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 22:09:06,245 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 22:09:06,246 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 22:09:06,246 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 22:09:06,264 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 22:09:06,464 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 22:09:06,465 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@3a7d7227 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 22:09:06,469 INFO L158 Benchmark]: Toolchain (without parser) took 3633.24ms. Allocated memory was 109.1MB in the beginning and 148.9MB in the end (delta: 39.8MB). Free memory was 79.8MB in the beginning and 70.2MB in the end (delta: 9.6MB). Peak memory consumption was 47.6MB. Max. memory is 16.1GB. [2021-12-18 22:09:06,469 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory was 66.9MB in the beginning and 66.8MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 22:09:06,469 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.89ms. Allocated memory is still 109.1MB. Free memory was 79.6MB in the beginning and 75.6MB in the end (delta: 3.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 22:09:06,469 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.05ms. Allocated memory is still 109.1MB. Free memory was 75.6MB in the beginning and 73.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 22:09:06,470 INFO L158 Benchmark]: Boogie Preprocessor took 39.59ms. Allocated memory is still 109.1MB. Free memory was 73.5MB in the beginning and 71.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 22:09:06,470 INFO L158 Benchmark]: RCFGBuilder took 472.25ms. Allocated memory was 109.1MB in the beginning and 148.9MB in the end (delta: 39.8MB). Free memory was 71.7MB in the beginning and 124.1MB in the end (delta: -52.4MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2021-12-18 22:09:06,470 INFO L158 Benchmark]: TraceAbstraction took 2697.57ms. Allocated memory is still 148.9MB. Free memory was 123.6MB in the beginning and 70.2MB in the end (delta: 53.4MB). Peak memory consumption was 52.0MB. Max. memory is 16.1GB. [2021-12-18 22:09:06,474 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory was 66.9MB in the beginning and 66.8MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 369.89ms. Allocated memory is still 109.1MB. Free memory was 79.6MB in the beginning and 75.6MB in the end (delta: 3.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.05ms. Allocated memory is still 109.1MB. Free memory was 75.6MB in the beginning and 73.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.59ms. Allocated memory is still 109.1MB. Free memory was 73.5MB in the beginning and 71.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 472.25ms. Allocated memory was 109.1MB in the beginning and 148.9MB in the end (delta: 39.8MB). Free memory was 71.7MB in the beginning and 124.1MB in the end (delta: -52.4MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2697.57ms. Allocated memory is still 148.9MB. Free memory was 123.6MB in the beginning and 70.2MB in the end (delta: 53.4MB). Peak memory consumption was 52.0MB. 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@3a7d7227 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@3a7d7227: 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 22:09:06,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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_append_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 f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 22:09:08,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 22:09:08,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 22:09:08,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 22:09:08,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 22:09:08,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 22:09:08,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 22:09:08,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 22:09:08,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 22:09:08,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 22:09:08,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 22:09:08,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 22:09:08,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 22:09:08,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 22:09:08,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 22:09:08,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 22:09:08,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 22:09:08,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 22:09:08,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 22:09:08,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 22:09:08,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 22:09:08,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 22:09:08,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 22:09:08,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 22:09:08,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 22:09:08,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 22:09:08,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 22:09:08,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 22:09:08,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 22:09:08,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 22:09:08,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 22:09:08,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 22:09:08,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 22:09:08,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 22:09:08,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 22:09:08,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 22:09:08,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 22:09:08,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 22:09:08,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 22:09:08,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 22:09:08,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 22:09:08,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 22:09:08,296 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 22:09:08,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 22:09:08,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 22:09:08,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 22:09:08,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 22:09:08,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 22:09:08,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 22:09:08,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 22:09:08,301 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 22:09:08,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 22:09:08,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 22:09:08,301 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 22:09:08,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 22:09:08,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 22:09:08,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 22:09:08,302 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 22:09:08,302 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 22:09:08,302 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 22:09:08,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 22:09:08,303 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 22:09:08,303 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 22:09:08,303 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 22:09:08,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 22:09:08,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 22:09:08,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 22:09:08,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 22:09:08,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 22:09:08,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:09:08,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 22:09:08,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 22:09:08,306 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 22:09:08,307 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 22:09:08,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 22:09:08,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 22:09:08,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2021-12-18 22:09:08,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 22:09:08,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 22:09:08,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 22:09:08,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 22:09:08,646 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 22:09:08,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2021-12-18 22:09:08,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22b60fa6/e385d5f8fde84a96a5b981627f8e28b7/FLAG25ecc209e [2021-12-18 22:09:09,105 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 22:09:09,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2021-12-18 22:09:09,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22b60fa6/e385d5f8fde84a96a5b981627f8e28b7/FLAG25ecc209e [2021-12-18 22:09:09,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22b60fa6/e385d5f8fde84a96a5b981627f8e28b7 [2021-12-18 22:09:09,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 22:09:09,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 22:09:09,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 22:09:09,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 22:09:09,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 22:09:09,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2e2c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09, skipping insertion in model container [2021-12-18 22:09:09,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 22:09:09,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 22:09:09,438 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_append_equal.i[24197,24210] [2021-12-18 22:09:09,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:09:09,454 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 22:09:09,498 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_append_equal.i[24197,24210] [2021-12-18 22:09:09,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:09:09,529 INFO L208 MainTranslator]: Completed translation [2021-12-18 22:09:09,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09 WrapperNode [2021-12-18 22:09:09,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 22:09:09,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 22:09:09,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 22:09:09,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 22:09:09,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,591 INFO L137 Inliner]: procedures = 130, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2021-12-18 22:09:09,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 22:09:09,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 22:09:09,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 22:09:09,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 22:09:09,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 22:09:09,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 22:09:09,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 22:09:09,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 22:09:09,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (1/1) ... [2021-12-18 22:09:09,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:09:09,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:09:09,655 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 22:09:09,661 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 22:09:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-18 22:09:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-18 22:09:09,684 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-18 22:09:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 22:09:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 22:09:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 22:09:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 22:09:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 22:09:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 22:09:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-18 22:09:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 22:09:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 22:09:09,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 22:09:09,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 22:09:09,797 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 22:09:09,798 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 22:09:10,041 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 22:09:10,045 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 22:09:10,045 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 22:09:10,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:09:10 BoogieIcfgContainer [2021-12-18 22:09:10,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 22:09:10,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 22:09:10,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 22:09:10,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 22:09:10,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 10:09:09" (1/3) ... [2021-12-18 22:09:10,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5adffeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:09:10, skipping insertion in model container [2021-12-18 22:09:10,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:09:09" (2/3) ... [2021-12-18 22:09:10,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5adffeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:09:10, skipping insertion in model container [2021-12-18 22:09:10,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:09:10" (3/3) ... [2021-12-18 22:09:10,052 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2021-12-18 22:09:10,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 22:09:10,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2021-12-18 22:09:10,096 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 22:09:10,102 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 22:09:10,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2021-12-18 22:09:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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 22:09:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:09:10,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:10,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:10,135 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:10,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:10,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904761, now seen corresponding path program 1 times [2021-12-18 22:09:10,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:10,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161633458] [2021-12-18 22:09:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:10,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:10,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:10,152 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 22:09:10,153 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 22:09:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 22:09:10,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:10,308 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 22:09:10,327 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 22:09:10,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:10,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:10,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161633458] [2021-12-18 22:09:10,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161633458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:10,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:10,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:09:10,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651789466] [2021-12-18 22:09:10,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:10,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:09:10,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:09:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:09:10,363 INFO L87 Difference]: Start difference. First operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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 22:09:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:10,478 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2021-12-18 22:09:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:09:10,480 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 22:09:10,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:10,485 INFO L225 Difference]: With dead ends: 83 [2021-12-18 22:09:10,485 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 22:09:10,487 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 22:09:10,489 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:10,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 22:09:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-18 22:09:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 76 states have internal predecessors, (82), 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 22:09:10,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-12-18 22:09:10,515 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 7 [2021-12-18 22:09:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:10,515 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-12-18 22:09:10,515 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 22:09:10,515 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-12-18 22:09:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:09:10,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:10,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:10,525 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 22:09:10,723 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 22:09:10,723 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904762, now seen corresponding path program 1 times [2021-12-18 22:09:10,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:10,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282452115] [2021-12-18 22:09:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:10,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:10,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:10,733 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 22:09:10,734 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 22:09:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 22:09:10,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:10,810 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 22:09:10,830 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 22:09:10,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:10,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282452115] [2021-12-18 22:09:10,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282452115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:10,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:10,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:09:10,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386561005] [2021-12-18 22:09:10,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:10,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:09:10,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:10,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:09:10,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:09:10,834 INFO L87 Difference]: Start difference. First operand 80 states and 86 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 22:09:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:10,926 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-12-18 22:09:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:09:10,927 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 22:09:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:10,928 INFO L225 Difference]: With dead ends: 78 [2021-12-18 22:09:10,928 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 22:09:10,928 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 22:09:10,929 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:10,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 22:09:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-18 22:09:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 74 states have internal predecessors, (80), 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 22:09:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-12-18 22:09:10,935 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 7 [2021-12-18 22:09:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:10,936 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-12-18 22:09:10,936 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 22:09:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-12-18 22:09:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 22:09:10,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:10,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:10,946 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 22:09:11,143 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 22:09:11,143 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:11,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810752, now seen corresponding path program 1 times [2021-12-18 22:09:11,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:11,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328216709] [2021-12-18 22:09:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:11,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:11,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:11,147 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 22:09:11,149 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 22:09:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:11,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 22:09:11,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:11,239 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 22:09:11,282 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 22:09:11,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:11,283 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:11,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328216709] [2021-12-18 22:09:11,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328216709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:11,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:11,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 22:09:11,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008659026] [2021-12-18 22:09:11,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:11,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:09:11,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:09:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:09:11,286 INFO L87 Difference]: Start difference. First operand 78 states and 84 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 22:09:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:11,484 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-12-18 22:09:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:09:11,484 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 22:09:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:11,486 INFO L225 Difference]: With dead ends: 82 [2021-12-18 22:09:11,486 INFO L226 Difference]: Without dead ends: 82 [2021-12-18 22:09:11,487 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 22:09:11,487 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 10 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:11,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 268 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:09:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-18 22:09:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-12-18 22:09:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 73 states have internal predecessors, (79), 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 22:09:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-12-18 22:09:11,493 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 13 [2021-12-18 22:09:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:11,494 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-12-18 22:09:11,494 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 22:09:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-12-18 22:09:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 22:09:11,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:11,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:11,517 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 22:09:11,702 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 22:09:11,702 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:11,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810753, now seen corresponding path program 1 times [2021-12-18 22:09:11,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:11,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702232543] [2021-12-18 22:09:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:11,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:11,705 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 22:09:11,727 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 22:09:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:11,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 22:09:11,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:11,808 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 22:09:11,896 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 22:09:11,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:11,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:11,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702232543] [2021-12-18 22:09:11,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702232543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:11,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:11,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 22:09:11,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450875696] [2021-12-18 22:09:11,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:11,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:09:11,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:09:11,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:09:11,901 INFO L87 Difference]: Start difference. First operand 77 states and 83 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 22:09:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:12,118 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-12-18 22:09:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:09:12,118 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 22:09:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:12,119 INFO L225 Difference]: With dead ends: 81 [2021-12-18 22:09:12,119 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 22:09:12,119 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 22:09:12,120 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 9 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:12,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 284 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:09:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 22:09:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-12-18 22:09:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 72 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 22:09:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-18 22:09:12,124 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 13 [2021-12-18 22:09:12,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:12,125 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-18 22:09:12,125 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 22:09:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-18 22:09:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 22:09:12,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:12,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:09:12,132 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 22:09:12,332 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 22:09:12,332 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1399608384, now seen corresponding path program 1 times [2021-12-18 22:09:12,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:12,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551576884] [2021-12-18 22:09:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:12,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:12,334 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 22:09:12,336 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 22:09:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:12,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 22:09:12,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:12,408 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 22:09:12,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:12,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551576884] [2021-12-18 22:09:12,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551576884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:12,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:12,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:09:12,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761149854] [2021-12-18 22:09:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:12,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:09:12,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:09:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:09:12,410 INFO L87 Difference]: Start difference. First operand 76 states and 82 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 22:09:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:12,415 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-12-18 22:09:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:09:12,416 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 22:09:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:12,416 INFO L225 Difference]: With dead ends: 82 [2021-12-18 22:09:12,417 INFO L226 Difference]: Without dead ends: 82 [2021-12-18 22:09:12,417 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 22:09:12,417 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 159 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 22:09:12,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 159 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:09:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-18 22:09:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-12-18 22:09:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 73 states have internal predecessors, (79), 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 22:09:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-12-18 22:09:12,422 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 15 [2021-12-18 22:09:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:12,422 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-12-18 22:09:12,422 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 22:09:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-12-18 22:09:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 22:09:12,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:12,423 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 22:09:12,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-18 22:09:12,629 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 22:09:12,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash -898428094, now seen corresponding path program 1 times [2021-12-18 22:09:12,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:12,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687340062] [2021-12-18 22:09:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:12,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:12,634 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 22:09:12,638 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 22:09:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:09:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:12,776 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 22:09:12,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:12,854 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 22:09:12,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687340062] [2021-12-18 22:09:12,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687340062] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:09:12,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:09:12,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-18 22:09:12,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068841866] [2021-12-18 22:09:12,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:09:12,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:09:12,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:09:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:09:12,856 INFO L87 Difference]: Start difference. First operand 77 states and 83 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 22:09:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:12,876 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-12-18 22:09:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:09:12,877 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 22:09:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:12,877 INFO L225 Difference]: With dead ends: 88 [2021-12-18 22:09:12,878 INFO L226 Difference]: Without dead ends: 88 [2021-12-18 22:09:12,878 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 22:09:12,878 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 11 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:12,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 317 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:09:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-18 22:09:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-12-18 22:09:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.6153846153846154) internal successors, (84), 78 states have internal predecessors, (84), 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 22:09:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-12-18 22:09:12,882 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 28 [2021-12-18 22:09:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:12,882 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-12-18 22:09:12,883 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 22:09:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-12-18 22:09:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 22:09:12,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:12,884 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 22:09:12,897 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 22:09:13,091 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 22:09:13,091 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:13,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186176, now seen corresponding path program 2 times [2021-12-18 22:09:13,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:13,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409579532] [2021-12-18 22:09:13,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:09:13,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:13,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:13,093 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 22:09:13,094 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 22:09:13,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:09:13,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:09:13,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:09:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:13,253 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 22:09:13,277 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 22:09:13,394 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:09:13,395 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 22:09:13,433 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 22:09:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:13,528 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 22:09:13,734 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 22:09:13,734 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 22:09:13,761 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 22:09:13,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:13,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:13,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409579532] [2021-12-18 22:09:13,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409579532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:09:13,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981381643] [2021-12-18 22:09:13,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:09:13,998 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:09:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:09:14,000 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 22:09:14,019 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 22:09:14,162 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 22:09:14,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165386177] [2021-12-18 22:09:14,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:09:14,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:09:14,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:09:14,166 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 22:09:14,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 1 [2021-12-18 22:09:14,218 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 22:09:14,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:09:14,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:09:14,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 22:09:14,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:14,355 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 22:09:16,465 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:09:16,466 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 22:09:16,593 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 22:09:16,594 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 22:09:16,701 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 22:09:16,701 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 22:09:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 10 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 22:09:16,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 22:09:17,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165386177] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:09:17,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:09:17,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 15 [2021-12-18 22:09:17,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409131127] [2021-12-18 22:09:17,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:09:17,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 22:09:17,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 22:09:17,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=220, Unknown=1, NotChecked=0, Total=272 [2021-12-18 22:09:17,151 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 16 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-18 22:09:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:23,444 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-12-18 22:09:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:09:23,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2021-12-18 22:09:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:23,446 INFO L225 Difference]: With dead ends: 100 [2021-12-18 22:09:23,446 INFO L226 Difference]: Without dead ends: 100 [2021-12-18 22:09:23,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 106 SyntacticMatches, 19 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=92, Invalid=369, Unknown=1, NotChecked=0, Total=462 [2021-12-18 22:09:23,447 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 36 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:23,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 386 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 213 Unchecked, 0.1s Time] [2021-12-18 22:09:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-18 22:09:23,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2021-12-18 22:09:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 82 states have internal predecessors, (88), 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 22:09:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-12-18 22:09:23,450 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 41 [2021-12-18 22:09:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:23,451 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-12-18 22:09:23,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-18 22:09:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-12-18 22:09:23,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 22:09:23,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:23,454 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 22:09:23,466 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 22:09:23,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-18 22:09:23,855 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 22:09:23,855 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186175, now seen corresponding path program 1 times [2021-12-18 22:09:23,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239046599] [2021-12-18 22:09:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:23,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:23,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:23,857 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 22:09:23,858 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 22:09:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:24,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 22:09:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:24,033 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 22:09:24,039 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 22:09:24,072 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 22:09:24,077 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 22:09:26,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:26,258 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 22:09:26,269 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:09:26,270 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 22:09:26,368 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 22:09:28,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:28,550 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 22:09:28,982 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:09:28,982 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 22:09:29,116 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 22:09:29,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:29,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:29,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239046599] [2021-12-18 22:09:29,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239046599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:09:29,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [312468140] [2021-12-18 22:09:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:29,404 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:09:29,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:09:29,405 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 22:09:29,406 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 22:09:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 22:09:29,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:29,658 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 22:09:29,695 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 22:09:29,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:29,868 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 22:09:30,005 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 22:09:32,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:32,308 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 22:09:32,597 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 22:09:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:32,756 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 22:09:32,845 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 22:09:32,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:33,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [312468140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:09:33,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:09:33,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-12-18 22:09:33,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804672446] [2021-12-18 22:09:33,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:09:33,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 22:09:33,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:33,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 22:09:33,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=479, Unknown=3, NotChecked=0, Total=552 [2021-12-18 22:09:33,516 INFO L87 Difference]: Start difference. First operand 88 states and 94 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 22:09:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:38,834 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-12-18 22:09:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:09:38,835 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 22:09:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:38,835 INFO L225 Difference]: With dead ends: 94 [2021-12-18 22:09:38,835 INFO L226 Difference]: Without dead ends: 94 [2021-12-18 22:09:38,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=115, Invalid=811, Unknown=4, NotChecked=0, Total=930 [2021-12-18 22:09:38,838 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 4 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:38,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 661 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 276 Unchecked, 0.2s Time] [2021-12-18 22:09:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-18 22:09:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-18 22:09:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.453125) internal successors, (93), 87 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-12-18 22:09:38,842 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 41 [2021-12-18 22:09:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:38,842 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-12-18 22:09:38,842 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 22:09:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-12-18 22:09:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 22:09:38,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:38,843 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] [2021-12-18 22:09:38,867 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 22:09:39,054 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 22:09:39,254 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 22:09:39,254 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:39,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1843554241, now seen corresponding path program 1 times [2021-12-18 22:09:39,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:39,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932541605] [2021-12-18 22:09:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:39,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:39,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:39,257 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 22:09:39,260 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 22:09:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:39,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 22:09:39,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:39,450 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 22:09:39,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:39,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:39,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932541605] [2021-12-18 22:09:39,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932541605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:39,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:39,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:09:39,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000374283] [2021-12-18 22:09:39,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:39,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:09:39,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:09:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:09:39,453 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 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 22:09:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:39,555 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-12-18 22:09:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:09:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 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 43 [2021-12-18 22:09:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:39,556 INFO L225 Difference]: With dead ends: 104 [2021-12-18 22:09:39,556 INFO L226 Difference]: Without dead ends: 104 [2021-12-18 22:09:39,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 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 22:09:39,557 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:39,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 77 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-18 22:09:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2021-12-18 22:09:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.421875) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-12-18 22:09:39,560 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 43 [2021-12-18 22:09:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:39,560 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-12-18 22:09:39,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 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 22:09:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-12-18 22:09:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 22:09:39,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:39,561 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] [2021-12-18 22:09:39,571 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 22:09:39,761 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 22:09:39,761 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1843554242, now seen corresponding path program 1 times [2021-12-18 22:09:39,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:39,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123995098] [2021-12-18 22:09:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:39,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:39,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:39,771 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 22:09:39,792 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 22:09:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:09:39,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:40,052 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 22:09:40,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:40,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123995098] [2021-12-18 22:09:40,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123995098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:40,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:40,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 22:09:40,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882472530] [2021-12-18 22:09:40,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:40,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:09:40,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:40,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:09:40,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:09:40,053 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22:09:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:40,193 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2021-12-18 22:09:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:09:40,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 43 [2021-12-18 22:09:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:40,194 INFO L225 Difference]: With dead ends: 90 [2021-12-18 22:09:40,194 INFO L226 Difference]: Without dead ends: 90 [2021-12-18 22:09:40,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 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 22:09:40,195 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 108 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:40,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 96 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-18 22:09:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-18 22:09:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 64 states have (on average 1.390625) internal successors, (89), 83 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-12-18 22:09:40,198 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 43 [2021-12-18 22:09:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:40,198 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-12-18 22:09:40,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22:09:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-12-18 22:09:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 22:09:40,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:40,199 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] [2021-12-18 22:09:40,210 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 22:09:40,399 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 22:09:40,399 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:40,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2129100770, now seen corresponding path program 1 times [2021-12-18 22:09:40,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:40,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364355178] [2021-12-18 22:09:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:40,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:40,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:40,401 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 22:09:40,403 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 22:09:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 22:09:40,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:40,609 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 22:09:40,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:40,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:40,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364355178] [2021-12-18 22:09:40,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364355178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:40,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:40,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:09:40,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695078146] [2021-12-18 22:09:40,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:40,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 22:09:40,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 22:09:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:09:40,612 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 22:09:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:40,743 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2021-12-18 22:09:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:09:40,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 45 [2021-12-18 22:09:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:40,747 INFO L225 Difference]: With dead ends: 101 [2021-12-18 22:09:40,747 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 22:09:40,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 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 22:09:40,748 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 109 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:40,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 91 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 22:09:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2021-12-18 22:09:40,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.375) internal successors, (88), 82 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2021-12-18 22:09:40,763 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 45 [2021-12-18 22:09:40,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:40,764 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2021-12-18 22:09:40,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 22:09:40,764 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2021-12-18 22:09:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 22:09:40,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:40,770 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] [2021-12-18 22:09:40,778 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 22:09:40,974 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 22:09:40,974 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2129100771, now seen corresponding path program 1 times [2021-12-18 22:09:40,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:40,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755255563] [2021-12-18 22:09:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:40,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:40,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:40,976 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 22:09:40,978 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 22:09:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:41,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 22:09:41,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:41,253 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 22:09:41,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:41,253 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:41,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755255563] [2021-12-18 22:09:41,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755255563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:41,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:41,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 22:09:41,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66907431] [2021-12-18 22:09:41,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:41,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:09:41,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:09:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:09:41,254 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 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 22:09:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:41,379 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-12-18 22:09:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:09:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 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 45 [2021-12-18 22:09:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:41,380 INFO L225 Difference]: With dead ends: 87 [2021-12-18 22:09:41,381 INFO L226 Difference]: Without dead ends: 87 [2021-12-18 22:09:41,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 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 22:09:41,381 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 146 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 78 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 22:09:41,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 78 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-18 22:09:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-18 22:09:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.34375) internal successors, (86), 80 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-12-18 22:09:41,383 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 45 [2021-12-18 22:09:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:41,383 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-12-18 22:09:41,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 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 22:09:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-12-18 22:09:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 22:09:41,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:41,384 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] [2021-12-18 22:09:41,410 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 22:09:41,591 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 22:09:41,592 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:41,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2129253767, now seen corresponding path program 1 times [2021-12-18 22:09:41,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:41,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294598809] [2021-12-18 22:09:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:41,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:41,594 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 22:09:41,596 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 22:09:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-18 22:09:41,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:41,891 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 22:09:42,040 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 22:09:42,047 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 22:09:42,220 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 22:09:42,226 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 22:09:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:42,595 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 16 treesize of output 18 [2021-12-18 22:09:42,620 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-18 22:09:42,620 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 16 treesize of output 18 [2021-12-18 22:09:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:42,633 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 14 treesize of output 16 [2021-12-18 22:09:42,864 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 22:09:42,870 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 22:09:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:09:43,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:44,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:44,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294598809] [2021-12-18 22:09:44,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294598809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:09:44,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1127978532] [2021-12-18 22:09:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:44,001 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:09:44,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:09:44,002 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:09:44,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-18 22:09:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:44,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 22:09:44,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:44,504 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 22:09:44,514 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 22:09:45,395 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 22:09:45,402 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 22:09:46,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:46,086 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 28 treesize of output 28 [2021-12-18 22:09:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:46,100 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 14 treesize of output 16 [2021-12-18 22:09:46,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:46,110 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 22:09:46,141 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:09:46,141 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 22:09:46,424 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 22:09:46,430 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 25 treesize of output 13 [2021-12-18 22:09:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:09:46,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:50,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1127978532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:09:50,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:09:50,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-12-18 22:09:50,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389288576] [2021-12-18 22:09:50,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:09:50,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 22:09:50,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 22:09:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1258, Unknown=15, NotChecked=0, Total=1406 [2021-12-18 22:09:50,027 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 33 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 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 22:09:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:51,327 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-12-18 22:09:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 22:09:51,328 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 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 45 [2021-12-18 22:09:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:51,329 INFO L225 Difference]: With dead ends: 88 [2021-12-18 22:09:51,329 INFO L226 Difference]: Without dead ends: 88 [2021-12-18 22:09:51,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=208, Invalid=1841, Unknown=21, NotChecked=0, Total=2070 [2021-12-18 22:09:51,330 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 22 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:51,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 364 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2021-12-18 22:09:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-18 22:09:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-12-18 22:09:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.353846153846154) internal successors, (88), 81 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-12-18 22:09:51,332 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 45 [2021-12-18 22:09:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:51,332 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-12-18 22:09:51,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 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 22:09:51,332 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-12-18 22:09:51,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 22:09:51,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:51,333 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] [2021-12-18 22:09:51,342 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 22:09:51,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-12-18 22:09:51,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:09:51,734 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2129253766, now seen corresponding path program 1 times [2021-12-18 22:09:51,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:51,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349503692] [2021-12-18 22:09:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:51,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:51,736 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 22:09:51,736 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 22:09:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 22:09:51,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:52,048 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 22:09:52,160 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 22:09:52,272 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 22:09:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:52,749 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 19 treesize of output 21 [2021-12-18 22:09:52,769 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-18 22:09:52,769 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 22:09:52,950 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 21 treesize of output 13 [2021-12-18 22:09:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:09:53,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:53,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:53,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349503692] [2021-12-18 22:09:53,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349503692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:09:53,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794191243] [2021-12-18 22:09:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:53,477 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:09:53,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:09:53,478 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:09:53,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-18 22:09:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:53,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 22:09:53,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:53,868 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 22:09:54,272 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 22:09:54,670 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-18 22:09:54,670 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 22:09:54,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:09:54,691 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 28 treesize of output 28 [2021-12-18 22:09:54,915 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 29 treesize of output 17 [2021-12-18 22:09:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:09:55,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:09:55,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794191243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:09:55,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:09:55,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-12-18 22:09:55,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435525749] [2021-12-18 22:09:55,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:09:55,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 22:09:55,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 22:09:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=924, Unknown=16, NotChecked=0, Total=1056 [2021-12-18 22:09:55,240 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:09:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:56,065 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2021-12-18 22:09:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 22:09:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-12-18 22:09:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:56,067 INFO L225 Difference]: With dead ends: 117 [2021-12-18 22:09:56,067 INFO L226 Difference]: Without dead ends: 117 [2021-12-18 22:09:56,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=187, Invalid=1431, Unknown=22, NotChecked=0, Total=1640 [2021-12-18 22:09:56,069 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 54 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:56,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 474 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 177 Invalid, 0 Unknown, 180 Unchecked, 0.3s Time] [2021-12-18 22:09:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-18 22:09:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2021-12-18 22:09:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 81 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-12-18 22:09:56,078 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 45 [2021-12-18 22:09:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:56,079 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-12-18 22:09:56,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 22:09:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-12-18 22:09:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 22:09:56,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:56,081 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] [2021-12-18 22:09:56,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-18 22:09:56,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-18 22:09:56,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:09:56,485 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1808436912, now seen corresponding path program 1 times [2021-12-18 22:09:56,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:56,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747761086] [2021-12-18 22:09:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:56,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:56,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:56,487 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 22:09:56,487 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 22:09:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:56,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 22:09:56,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:56,713 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 22:09:56,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:56,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:56,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747761086] [2021-12-18 22:09:56,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747761086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:56,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:56,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:09:56,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686053798] [2021-12-18 22:09:56,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:56,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:09:56,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:56,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:09:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:09:56,716 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 22:09:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:56,837 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2021-12-18 22:09:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:09:56,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 47 [2021-12-18 22:09:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:56,838 INFO L225 Difference]: With dead ends: 115 [2021-12-18 22:09:56,838 INFO L226 Difference]: Without dead ends: 115 [2021-12-18 22:09:56,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 22:09:56,838 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:56,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 124 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:09:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-18 22:09:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 86. [2021-12-18 22:09:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 79 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-12-18 22:09:56,841 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 47 [2021-12-18 22:09:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:56,841 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-12-18 22:09:56,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 22:09:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-12-18 22:09:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 22:09:56,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:56,842 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] [2021-12-18 22:09:56,851 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 22:09:57,042 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 22:09:57,042 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1808436913, now seen corresponding path program 1 times [2021-12-18 22:09:57,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:57,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234670700] [2021-12-18 22:09:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:57,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:57,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:57,044 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 22:09:57,046 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 22:09:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 22:09:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:57,284 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 22:09:57,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:57,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:57,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234670700] [2021-12-18 22:09:57,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234670700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:57,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:57,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:09:57,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560120379] [2021-12-18 22:09:57,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:57,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:09:57,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:09:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:09:57,286 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 22:09:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:57,506 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2021-12-18 22:09:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:09:57,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 47 [2021-12-18 22:09:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:57,508 INFO L225 Difference]: With dead ends: 115 [2021-12-18 22:09:57,508 INFO L226 Difference]: Without dead ends: 115 [2021-12-18 22:09:57,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 22:09:57,509 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 36 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:57,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 132 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:09:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-18 22:09:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2021-12-18 22:09:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 77 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2021-12-18 22:09:57,511 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 47 [2021-12-18 22:09:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:57,511 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2021-12-18 22:09:57,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 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 22:09:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2021-12-18 22:09:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 22:09:57,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:57,511 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] [2021-12-18 22:09:57,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-18 22:09:57,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:09:57,720 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash -35949242, now seen corresponding path program 1 times [2021-12-18 22:09:57,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:57,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351460394] [2021-12-18 22:09:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:57,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:57,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:57,722 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:09:57,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-18 22:09:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:57,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 22:09:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:57,941 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 22:09:58,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 22:09:58,080 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 22:09:58,114 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 22:09:58,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:58,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351460394] [2021-12-18 22:09:58,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351460394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:58,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:58,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 22:09:58,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287190936] [2021-12-18 22:09:58,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:58,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:09:58,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:58,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:09:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:09:58,115 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 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 22:09:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:58,650 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2021-12-18 22:09:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 22:09:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 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 48 [2021-12-18 22:09:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:58,651 INFO L225 Difference]: With dead ends: 145 [2021-12-18 22:09:58,651 INFO L226 Difference]: Without dead ends: 145 [2021-12-18 22:09:58,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-18 22:09:58,652 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 159 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:58,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 279 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 22:09:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-18 22:09:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 88. [2021-12-18 22:09:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2021-12-18 22:09:58,658 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 48 [2021-12-18 22:09:58,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:58,658 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2021-12-18 22:09:58,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 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 22:09:58,658 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2021-12-18 22:09:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 22:09:58,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:58,658 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] [2021-12-18 22:09:58,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-18 22:09:58,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:09:58,868 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:09:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:09:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash -35949241, now seen corresponding path program 1 times [2021-12-18 22:09:58,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:09:58,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635019977] [2021-12-18 22:09:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:09:58,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:09:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:09:58,870 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 22:09:58,878 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 22:09:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:09:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 22:09:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:09:59,072 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 22:09:59,180 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 22:09:59,186 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 22:09:59,211 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 22:09:59,219 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 22:09:59,260 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 22:09:59,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:09:59,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:09:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635019977] [2021-12-18 22:09:59,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635019977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:09:59,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:09:59,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 22:09:59,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812570561] [2021-12-18 22:09:59,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:09:59,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:09:59,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:09:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:09:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:09:59,263 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 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 22:09:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:09:59,834 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2021-12-18 22:09:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 22:09:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 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 48 [2021-12-18 22:09:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:09:59,836 INFO L225 Difference]: With dead ends: 135 [2021-12-18 22:09:59,837 INFO L226 Difference]: Without dead ends: 135 [2021-12-18 22:09:59,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 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 22:09:59,837 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 215 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:09:59,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 287 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 22:09:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-18 22:09:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 90. [2021-12-18 22:09:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.25) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:09:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-12-18 22:09:59,841 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 48 [2021-12-18 22:09:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:09:59,841 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-12-18 22:09:59,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 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 22:09:59,841 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-12-18 22:09:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 22:09:59,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:09:59,842 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 22:09:59,851 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 22:10:00,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:10:00,050 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:10:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:10:00,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1114427801, now seen corresponding path program 1 times [2021-12-18 22:10:00,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:10:00,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255509348] [2021-12-18 22:10:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:00,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:10:00,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:10:00,053 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:10:00,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 22:10:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 22:10:00,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:00,356 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 22:10:00,374 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 22:10:00,403 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 22:10:00,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:10:00,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:10:00,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255509348] [2021-12-18 22:10:00,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255509348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:10:00,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:10:00,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 22:10:00,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539892895] [2021-12-18 22:10:00,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:10:00,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:10:00,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:10:00,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:10:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:10:00,405 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) 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 22:10:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:10:00,748 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-12-18 22:10:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 22:10:00,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) 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 22:10:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:10:00,750 INFO L225 Difference]: With dead ends: 118 [2021-12-18 22:10:00,750 INFO L226 Difference]: Without dead ends: 118 [2021-12-18 22:10:00,750 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 22:10:00,750 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 147 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:10:00,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 447 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 22:10:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-18 22:10:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-12-18 22:10:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 83 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:10:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-12-18 22:10:00,753 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 49 [2021-12-18 22:10:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:10:00,753 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-12-18 22:10:00,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) 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 22:10:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-12-18 22:10:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 22:10:00,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:10:00,753 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 22:10:00,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-18 22:10:00,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:10:00,960 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:10:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:10:00,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1553828739, now seen corresponding path program 1 times [2021-12-18 22:10:00,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:10:00,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284985575] [2021-12-18 22:10:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:00,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:10:00,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:10:00,962 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 22:10:00,967 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 22:10:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:01,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-18 22:10:01,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:01,296 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 22:10:01,308 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 22:10:01,869 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:10:01,870 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 22:10:01,908 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:10:01,908 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 22:10:02,103 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 22:10:02,119 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 22:10:02,547 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-18 22:10:02,548 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 70 treesize of output 46 [2021-12-18 22:10:02,559 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:10:02,560 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 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:10:02,573 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 22:10:02,586 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 22:10:02,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:02,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:02,961 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:10:02,962 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 25 treesize of output 30 [2021-12-18 22:10:02,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:02,992 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:10:02,992 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 76 treesize of output 66 [2021-12-18 22:10:03,052 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-18 22:10:03,052 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 22:10:03,068 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 22:10:04,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:10:04,729 INFO L354 Elim1Store]: treesize reduction 15, result has 55.9 percent of original size [2021-12-18 22:10:04,729 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 95 treesize of output 62 [2021-12-18 22:10:04,756 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-12-18 22:10:04,756 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 3 case distinctions, treesize of input 43 treesize of output 29 [2021-12-18 22:10:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:10:05,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:10:08,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:10:08,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284985575] [2021-12-18 22:10:08,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284985575] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:10:08,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1166921437] [2021-12-18 22:10:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:08,539 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:10:08,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:10:08,540 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 22:10:08,547 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 22:10:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:08,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-18 22:10:08,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:09,094 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 22:10:09,107 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 22:10:09,997 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:10:09,998 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 22:10:10,042 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:10:10,042 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 22:10:10,394 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 22:10:10,407 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 22:10:11,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:11,198 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 70 treesize of output 37 [2021-12-18 22:10:11,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:11,213 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 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:10:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:11,961 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:10:11,962 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 76 treesize of output 66 [2021-12-18 22:10:11,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:11,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:11,987 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:10:11,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-18 22:10:11,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:11,998 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 22:10:12,032 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-18 22:10:12,033 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 22:10:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:13,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:10:13,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:13,535 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 22:10:13,560 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-12-18 22:10:13,561 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 22:10:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:10:13,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:10:15,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1166921437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:10:15,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:10:15,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 44 [2021-12-18 22:10:15,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479769615] [2021-12-18 22:10:15,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:10:15,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 22:10:15,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:10:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 22:10:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2442, Unknown=11, NotChecked=0, Total=2652 [2021-12-18 22:10:15,266 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 45 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 38 states have internal predecessors, (73), 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 22:10:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:10:18,764 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-12-18 22:10:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 22:10:18,765 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 38 states have internal predecessors, (73), 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 49 [2021-12-18 22:10:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:10:18,766 INFO L225 Difference]: With dead ends: 96 [2021-12-18 22:10:18,766 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 22:10:18,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=346, Invalid=3927, Unknown=17, NotChecked=0, Total=4290 [2021-12-18 22:10:18,767 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 47 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 22:10:18,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 631 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 273 Invalid, 0 Unknown, 257 Unchecked, 0.6s Time] [2021-12-18 22:10:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 22:10:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-12-18 22:10:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.25) internal successors, (95), 87 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:10:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-12-18 22:10:18,769 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 49 [2021-12-18 22:10:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:10:18,769 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-12-18 22:10:18,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 38 states have internal predecessors, (73), 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 22:10:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-12-18 22:10:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 22:10:18,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:10:18,770 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 22:10:18,774 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 22:10:18,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-18 22:10:19,174 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 22:10:19,174 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:10:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:10:19,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1553828740, now seen corresponding path program 1 times [2021-12-18 22:10:19,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:10:19,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751153696] [2021-12-18 22:10:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:19,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:10:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:10:19,176 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 22:10:19,177 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 22:10:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:19,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 22:10:19,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:19,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:19,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:19,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 24 [2021-12-18 22:10:19,772 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 22:10:19,773 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 24 treesize of output 41 [2021-12-18 22:10:20,380 INFO L354 Elim1Store]: treesize reduction 53, result has 41.1 percent of original size [2021-12-18 22:10:20,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 38 treesize of output 65 [2021-12-18 22:10:20,663 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 22:10:20,682 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 22:10:21,506 INFO L354 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2021-12-18 22:10:21,506 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 116 treesize of output 62 [2021-12-18 22:10:21,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-18 22:10:21,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:21,541 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 41 treesize of output 49 [2021-12-18 22:10:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:22,426 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:10:22,426 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 104 [2021-12-18 22:10:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:22,441 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 109 treesize of output 103 [2021-12-18 22:10:22,540 INFO L354 Elim1Store]: treesize reduction 133, result has 35.4 percent of original size [2021-12-18 22:10:22,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 88 treesize of output 136 [2021-12-18 22:10:23,259 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 129 treesize of output 101 [2021-12-18 22:10:30,436 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-18 22:10:30,437 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 125 treesize of output 69 [2021-12-18 22:10:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:10:31,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:10:32,695 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:10:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751153696] [2021-12-18 22:10:32,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751153696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:10:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1499212315] [2021-12-18 22:10:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:32,697 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:10:32,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:10:32,708 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 22:10:32,709 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 22:10:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:33,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 22:10:33,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:33,330 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 22:10:34,476 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:10:34,476 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 22:10:34,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 22:10:35,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:35,674 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 46 treesize of output 25 [2021-12-18 22:10:35,682 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 22:10:36,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:36,730 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 14 treesize of output 16 [2021-12-18 22:10:36,800 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-12-18 22:10:36,800 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 22:10:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:36,832 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:10:36,832 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 74 treesize of output 64 [2021-12-18 22:10:37,381 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 22:10:38,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:38,284 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 79 treesize of output 38 [2021-12-18 22:10:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:10:38,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:10:39,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1499212315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:10:39,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:10:39,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 51 [2021-12-18 22:10:39,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275035260] [2021-12-18 22:10:39,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:10:39,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 22:10:39,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:10:39,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 22:10:39,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3182, Unknown=19, NotChecked=0, Total=3422 [2021-12-18 22:10:39,273 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 52 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 43 states have internal predecessors, (86), 6 states have call successors, (6), 5 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 22:10:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:10:45,027 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2021-12-18 22:10:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 22:10:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 43 states have internal predecessors, (86), 6 states have call successors, (6), 5 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 49 [2021-12-18 22:10:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:10:45,032 INFO L225 Difference]: With dead ends: 131 [2021-12-18 22:10:45,032 INFO L226 Difference]: Without dead ends: 131 [2021-12-18 22:10:45,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=460, Invalid=6478, Unknown=34, NotChecked=0, Total=6972 [2021-12-18 22:10:45,035 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 64 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 22:10:45,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1010 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 427 Invalid, 0 Unknown, 344 Unchecked, 0.9s Time] [2021-12-18 22:10:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-18 22:10:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-12-18 22:10:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.236842105263158) internal successors, (94), 87 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:10:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-12-18 22:10:45,048 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 49 [2021-12-18 22:10:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:10:45,048 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-12-18 22:10:45,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 43 states have internal predecessors, (86), 6 states have call successors, (6), 5 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 22:10:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-12-18 22:10:45,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 22:10:45,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:10:45,050 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] [2021-12-18 22:10:45,056 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 22:10:45,262 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 22:10:45,462 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 22:10:45,462 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:10:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:10:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash 218878957, now seen corresponding path program 1 times [2021-12-18 22:10:45,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:10:45,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194881964] [2021-12-18 22:10:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:45,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:10:45,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:10:45,464 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 22:10:45,465 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 22:10:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:45,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 22:10:45,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:45,908 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 22:10:46,032 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 8 treesize of output 4 [2021-12-18 22:10:46,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:46,293 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 15 treesize of output 17 [2021-12-18 22:10:46,363 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 22:10:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:10:46,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:10:46,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:10:46,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194881964] [2021-12-18 22:10:46,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194881964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:10:46,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338328152] [2021-12-18 22:10:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:46,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:10:46,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:10:46,594 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 22:10:46,595 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 22:10:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 22:10:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:47,468 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 22:10:47,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:47,641 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 15 treesize of output 17 [2021-12-18 22:10:47,732 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 22:10:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:10:47,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:10:47,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338328152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:10:47,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:10:47,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-12-18 22:10:47,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118534786] [2021-12-18 22:10:47,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:10:47,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 22:10:47,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:10:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 22:10:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=543, Unknown=13, NotChecked=0, Total=650 [2021-12-18 22:10:47,915 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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 22:10:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:10:48,613 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-12-18 22:10:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 22:10:48,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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 52 [2021-12-18 22:10:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:10:48,614 INFO L225 Difference]: With dead ends: 86 [2021-12-18 22:10:48,614 INFO L226 Difference]: Without dead ends: 86 [2021-12-18 22:10:48,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=881, Unknown=20, NotChecked=0, Total=1056 [2021-12-18 22:10:48,615 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 17 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:10:48,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 462 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2021-12-18 22:10:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-18 22:10:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-18 22:10:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.25) internal successors, (85), 79 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:10:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-12-18 22:10:48,617 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 52 [2021-12-18 22:10:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:10:48,617 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-12-18 22:10:48,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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 22:10:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-12-18 22:10:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 22:10:48,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:10:48,617 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] [2021-12-18 22:10:48,628 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 22:10:48,824 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 22:10:49,018 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 22:10:49,018 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:10:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:10:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash -521057353, now seen corresponding path program 1 times [2021-12-18 22:10:49,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:10:49,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984075034] [2021-12-18 22:10:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:49,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:10:49,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:10:49,020 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 22:10:49,021 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 22:10:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 22:10:49,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:49,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 22:10:49,660 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 22:10:49,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:49,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2021-12-18 22:10:49,951 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 22:10:50,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:50,358 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 22:10:50,358 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 19 treesize of output 31 [2021-12-18 22:10:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:50,370 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 14 treesize of output 16 [2021-12-18 22:10:50,678 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 22:10:51,151 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:10:51,152 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 35 [2021-12-18 22:10:51,272 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 22:10:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:10:51,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:10:51,733 INFO L354 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2021-12-18 22:10:51,734 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 23 treesize of output 22 [2021-12-18 22:10:51,744 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1747 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1747) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |c_ULTIMATE.start_sll_append_~last~0#1.base|)) is different from false [2021-12-18 22:10:52,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:10:52,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984075034] [2021-12-18 22:10:52,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984075034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:10:52,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1664870599] [2021-12-18 22:10:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:52,476 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:10:52,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:10:52,478 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 22:10:52,478 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 22:10:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:52,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 22:10:52,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:53,082 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 22:10:53,786 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 22:10:53,786 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2021-12-18 22:10:54,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:54,014 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 59 treesize of output 54 [2021-12-18 22:10:54,106 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 22:10:54,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:10:54,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1664870599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:10:54,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 22:10:54,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [28] total 39 [2021-12-18 22:10:54,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998201207] [2021-12-18 22:10:54,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:10:54,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 22:10:54,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:10:54,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 22:10:54,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1916, Unknown=16, NotChecked=88, Total=2162 [2021-12-18 22:10:54,108 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 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 22:10:54,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:10:54,720 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-12-18 22:10:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 22:10:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 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 52 [2021-12-18 22:10:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:10:54,721 INFO L225 Difference]: With dead ends: 110 [2021-12-18 22:10:54,722 INFO L226 Difference]: Without dead ends: 110 [2021-12-18 22:10:54,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=2273, Unknown=16, NotChecked=96, Total=2550 [2021-12-18 22:10:54,726 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 80 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:10:54,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 240 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 210 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2021-12-18 22:10:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-18 22:10:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2021-12-18 22:10:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 85 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:10:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-12-18 22:10:54,730 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 52 [2021-12-18 22:10:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:10:54,730 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-12-18 22:10:54,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 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 22:10:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-12-18 22:10:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 22:10:54,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:10:54,731 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] [2021-12-18 22:10:54,742 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 22:10:54,944 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 22:10:55,143 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 22:10:55,144 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:10:55,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:10:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash -521057352, now seen corresponding path program 1 times [2021-12-18 22:10:55,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:10:55,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307447732] [2021-12-18 22:10:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:10:55,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:10:55,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:10:55,146 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 22:10:55,147 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 22:10:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:10:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 22:10:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:10:55,800 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 13 treesize of output 9 [2021-12-18 22:10:55,809 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 22:10:56,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:56,124 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 12 treesize of output 20 [2021-12-18 22:10:56,130 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 22:10:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:56,535 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 22:10:56,535 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 19 treesize of output 31 [2021-12-18 22:10:56,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:56,549 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 14 treesize of output 16 [2021-12-18 22:10:57,506 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:10:57,507 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 53 [2021-12-18 22:10:57,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:10:57,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2021-12-18 22:10:57,523 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 3 [2021-12-18 22:10:57,672 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 30 treesize of output 18 [2021-12-18 22:10:57,678 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 22:10:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:10:57,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:10:58,385 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1890 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1891 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1890) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_1890 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1890) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32)))))) is different from false [2021-12-18 22:10:58,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:10:58,699 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 52 treesize of output 56 [2021-12-18 22:11:01,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:11:01,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307447732] [2021-12-18 22:11:01,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307447732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:11:01,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1893992141] [2021-12-18 22:11:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:11:01,010 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:11:01,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:11:01,011 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 22:11:01,012 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 22:11:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:11:01,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 22:11:01,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:11:01,435 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 22:11:01,615 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 22:11:02,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:02,034 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 22:11:02,287 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 22:11:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:02,914 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 22:11:03,933 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 22:11:03,937 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 22:11:04,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:04,936 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 14 treesize of output 16 [2021-12-18 22:11:04,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:04,947 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 22:11:05,780 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:11:05,781 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2021-12-18 22:11:05,798 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:11:05,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-18 22:11:06,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-18 22:11:06,105 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 22:11:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:11:06,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:11:07,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:11:07,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2021-12-18 22:11:07,744 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 62 treesize of output 60 [2021-12-18 22:11:09,901 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 9 treesize of output 7 [2021-12-18 22:11:15,627 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 9 treesize of output 7 [2021-12-18 22:11:17,609 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 9 treesize of output 7 [2021-12-18 22:11:19,301 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 9 treesize of output 7 [2021-12-18 22:11:22,892 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 12 treesize of output 10 [2021-12-18 22:11:23,634 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 12 treesize of output 10 [2021-12-18 22:11:24,362 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 12 treesize of output 10 [2021-12-18 22:11:27,513 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 12 treesize of output 10 [2021-12-18 22:11:28,159 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 12 treesize of output 10 [2021-12-18 22:11:28,904 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 12 treesize of output 10 [2021-12-18 22:11:29,750 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 12 treesize of output 10 [2021-12-18 22:11:30,254 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 12 treesize of output 10 [2021-12-18 22:11:30,940 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 12 treesize of output 10 [2021-12-18 22:11:31,198 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 12 treesize of output 10 [2021-12-18 22:11:32,330 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 12 treesize of output 10 [2021-12-18 22:11:33,010 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 12 treesize of output 10 [2021-12-18 22:11:33,787 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 12 treesize of output 10 [2021-12-18 22:11:34,702 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 12 treesize of output 10 [2021-12-18 22:11:36,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1893992141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:11:36,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:11:36,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23] total 50 [2021-12-18 22:11:36,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871299774] [2021-12-18 22:11:36,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:11:36,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-18 22:11:36,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:11:36,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-18 22:11:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3585, Unknown=99, NotChecked=122, Total=4032 [2021-12-18 22:11:36,066 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 51 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (6), 5 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 22:11:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:11:42,114 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2021-12-18 22:11:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 22:11:42,115 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (6), 5 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 52 [2021-12-18 22:11:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:11:42,115 INFO L225 Difference]: With dead ends: 93 [2021-12-18 22:11:42,115 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 22:11:42,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=473, Invalid=7578, Unknown=143, NotChecked=178, Total=8372 [2021-12-18 22:11:42,117 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:11:42,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 824 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 334 Unchecked, 0.3s Time] [2021-12-18 22:11:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 22:11:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-12-18 22:11:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:11:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-12-18 22:11:42,119 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 52 [2021-12-18 22:11:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:11:42,120 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-12-18 22:11:42,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (6), 5 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 22:11:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-12-18 22:11:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 22:11:42,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:11:42,120 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 22:11:42,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-18 22:11:42,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-12-18 22:11:42,522 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 22:11:42,523 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:11:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:11:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1027089942, now seen corresponding path program 1 times [2021-12-18 22:11:42,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:11:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437953985] [2021-12-18 22:11:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:11:42,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:11:42,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:11:42,525 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 22:11:42,526 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 22:11:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:11:42,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 22:11:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:11:43,232 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 22:11:43,250 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 22:11:43,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:11:43,587 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 21 treesize of output 24 [2021-12-18 22:11:43,592 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 22:11:43,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:44,025 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 22:11:44,026 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 27 treesize of output 37 [2021-12-18 22:11:44,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:44,040 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 14 treesize of output 16 [2021-12-18 22:11:44,367 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 22:11:44,910 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:11:44,911 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 32 [2021-12-18 22:11:45,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-18 22:11:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:11:45,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:11:45,517 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2046 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2046) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-18 22:11:46,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:11:46,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437953985] [2021-12-18 22:11:46,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437953985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:11:46,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1336458776] [2021-12-18 22:11:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:11:46,449 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:11:46,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:11:46,450 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 22:11:46,476 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 22:11:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:11:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 22:11:46,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:11:48,203 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 22:11:49,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:49,148 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 22 treesize of output 22 [2021-12-18 22:11:50,511 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:11:50,512 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-18 22:11:50,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-18 22:11:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:11:51,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:11:51,210 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2119 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2119) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-18 22:11:51,234 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2119 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base| v_ArrVal_2119) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-18 22:11:51,245 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2119 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) v_ArrVal_2119) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-18 22:11:51,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1336458776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:11:51,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:11:51,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21] total 45 [2021-12-18 22:11:51,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165011932] [2021-12-18 22:11:51,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:11:51,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 22:11:51,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:11:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 22:11:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2589, Unknown=68, NotChecked=428, Total=3306 [2021-12-18 22:11:51,582 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 40 states have internal predecessors, (88), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 22:11:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:11:54,468 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-12-18 22:11:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 22:11:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 40 states have internal predecessors, (88), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2021-12-18 22:11:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:11:54,469 INFO L225 Difference]: With dead ends: 93 [2021-12-18 22:11:54,469 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 22:11:54,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=408, Invalid=4471, Unknown=107, NotChecked=564, Total=5550 [2021-12-18 22:11:54,470 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:11:54,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 940 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 284 Unchecked, 0.4s Time] [2021-12-18 22:11:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 22:11:54,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-12-18 22:11:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:11:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-12-18 22:11:54,472 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 53 [2021-12-18 22:11:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:11:54,472 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-12-18 22:11:54,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 40 states have internal predecessors, (88), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 22:11:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-12-18 22:11:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 22:11:54,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:11:54,473 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] [2021-12-18 22:11:54,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-12-18 22:11:54,682 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 22:11:54,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:11:54,874 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:11:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:11:54,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1947817869, now seen corresponding path program 2 times [2021-12-18 22:11:54,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:11:54,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864755974] [2021-12-18 22:11:54,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:11:54,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:11:54,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:11:54,875 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:11:54,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-18 22:11:55,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:11:55,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:11:55,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 22:11:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:11:55,269 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 22:11:55,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 22:11:55,517 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 22:11:56,257 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:11:56,257 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 22:11:56,274 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 16 treesize of output 18 [2021-12-18 22:11:56,288 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 16 treesize of output 18 [2021-12-18 22:11:56,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 22:11:56,525 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 22:11:57,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:11:57,242 INFO L354 Elim1Store]: treesize reduction 11, result has 71.8 percent of original size [2021-12-18 22:11:57,243 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 117 treesize of output 78 [2021-12-18 22:11:57,258 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-18 22:11:57,259 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 2 case distinctions, treesize of input 43 treesize of output 26 [2021-12-18 22:11:57,266 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 22:11:57,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:57,745 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-18 22:11:57,745 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 113 [2021-12-18 22:11:57,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:57,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:11:57,778 INFO L354 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2021-12-18 22:11:57,779 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 119 [2021-12-18 22:11:57,809 INFO L354 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2021-12-18 22:11:57,809 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 41 treesize of output 43 [2021-12-18 22:12:00,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:12:00,423 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-12-18 22:12:00,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 109 [2021-12-18 22:12:00,458 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-12-18 22:12:00,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 51 [2021-12-18 22:12:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:12:00,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:12:01,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:12:01,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864755974] [2021-12-18 22:12:01,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864755974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:12:01,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [554570524] [2021-12-18 22:12:01,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:12:01,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:12:01,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:12:01,677 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:12:01,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-12-18 22:12:02,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:12:02,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:12:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 22:12:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:12:02,363 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 22:12:02,932 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 22:12:02,941 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 13 treesize of output 9 [2021-12-18 22:12:04,268 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:12:04,268 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 22:12:04,280 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 22:12:04,318 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:12:04,319 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 22:12:04,331 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 22:12:04,366 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:12:04,366 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 22:12:04,770 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 22:12:04,775 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 22:12:05,805 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 22:12:05,805 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 87 treesize of output 45 [2021-12-18 22:12:05,812 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 22:12:05,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:12:05,825 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2021-12-18 22:12:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:06,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:06,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:06,713 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-12-18 22:12:06,713 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 2 case distinctions, treesize of input 40 treesize of output 48 [2021-12-18 22:12:06,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:06,774 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-18 22:12:06,774 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 93 treesize of output 83 [2021-12-18 22:12:06,812 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-18 22:12:06,812 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 22:12:09,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:12:09,421 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-12-18 22:12:09,421 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 152 treesize of output 82 [2021-12-18 22:12:09,459 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-12-18 22:12:09,459 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 6 case distinctions, treesize of input 41 treesize of output 29 [2021-12-18 22:12:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:12:09,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:12:10,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [554570524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:12:10,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:12:10,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-12-18 22:12:10,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812679869] [2021-12-18 22:12:10,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:12:10,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 22:12:10,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:12:10,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 22:12:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3633, Unknown=16, NotChecked=0, Total=3906 [2021-12-18 22:12:10,171 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 56 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 48 states have internal predecessors, (90), 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 22:12:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:12:14,881 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2021-12-18 22:12:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 22:12:14,882 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 48 states have internal predecessors, (90), 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 53 [2021-12-18 22:12:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:12:14,883 INFO L225 Difference]: With dead ends: 140 [2021-12-18 22:12:14,883 INFO L226 Difference]: Without dead ends: 140 [2021-12-18 22:12:14,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=447, Invalid=6333, Unknown=26, NotChecked=0, Total=6806 [2021-12-18 22:12:14,884 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 48 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 22:12:14,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1210 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 368 Invalid, 0 Unknown, 315 Unchecked, 0.9s Time] [2021-12-18 22:12:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-18 22:12:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2021-12-18 22:12:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 116 states have internal predecessors, (123), 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 22:12:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 135 transitions. [2021-12-18 22:12:14,887 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 135 transitions. Word has length 53 [2021-12-18 22:12:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:12:14,887 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 135 transitions. [2021-12-18 22:12:14,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 48 states have internal predecessors, (90), 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 22:12:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 135 transitions. [2021-12-18 22:12:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 22:12:14,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:12:14,888 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] [2021-12-18 22:12:14,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-12-18 22:12:15,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-12-18 22:12:15,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:12:15,305 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:12:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:12:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1775059065, now seen corresponding path program 1 times [2021-12-18 22:12:15,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:12:15,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276284755] [2021-12-18 22:12:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:12:15,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:12:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:12:15,307 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:12:15,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-18 22:12:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:12:15,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 22:12:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:12:15,963 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 22:12:15,973 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 22:12:16,239 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 22:12:16,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:12:16,256 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 12 treesize of output 20 [2021-12-18 22:12:16,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:16,665 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 22:12:16,665 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 19 treesize of output 31 [2021-12-18 22:12:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:16,678 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 14 treesize of output 16 [2021-12-18 22:12:17,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:12:17,331 INFO L354 Elim1Store]: treesize reduction 23, result has 41.0 percent of original size [2021-12-18 22:12:17,331 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 46 treesize of output 38 [2021-12-18 22:12:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:17,641 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 14 treesize of output 16 [2021-12-18 22:12:17,743 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 22:12:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:12:17,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:12:18,068 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 22:12:18,460 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2359 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2359) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_2359 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2359) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32)))))) is different from false [2021-12-18 22:12:20,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:12:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276284755] [2021-12-18 22:12:20,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276284755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:12:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1163851509] [2021-12-18 22:12:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:12:20,422 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:12:20,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:12:20,423 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:12:20,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-12-18 22:12:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:12:20,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-18 22:12:20,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:12:22,463 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 22:12:22,468 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 22:12:22,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:22,859 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 14 treesize of output 16 [2021-12-18 22:12:22,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:22,871 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 14 treesize of output 16 [2021-12-18 22:12:23,394 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 22:12:23,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:23,842 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 14 treesize of output 16 [2021-12-18 22:12:24,021 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 22:12:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 22:12:24,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:12:24,076 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 22:12:24,745 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2434 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2434) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) is different from false [2021-12-18 22:12:24,776 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2434 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem9#1.base| v_ArrVal_2434) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) is different from false [2021-12-18 22:12:24,798 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2434 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) v_ArrVal_2434) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) is different from false [2021-12-18 22:12:25,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1163851509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:12:25,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:12:25,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21] total 42 [2021-12-18 22:12:25,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008423149] [2021-12-18 22:12:25,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:12:25,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 22:12:25,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:12:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 22:12:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2794, Unknown=59, NotChecked=444, Total=3540 [2021-12-18 22:12:25,325 INFO L87 Difference]: Start difference. First operand 127 states and 135 transitions. Second operand has 43 states, 40 states have (on average 2.1) internal successors, (84), 38 states have internal predecessors, (84), 5 states have call successors, (5), 3 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 22:12:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:12:28,037 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2021-12-18 22:12:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 22:12:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.1) internal successors, (84), 38 states have internal predecessors, (84), 5 states have call successors, (5), 3 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 54 [2021-12-18 22:12:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:12:28,039 INFO L225 Difference]: With dead ends: 134 [2021-12-18 22:12:28,039 INFO L226 Difference]: Without dead ends: 134 [2021-12-18 22:12:28,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=420, Invalid=4483, Unknown=83, NotChecked=564, Total=5550 [2021-12-18 22:12:28,040 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 73 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:12:28,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 764 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 280 Invalid, 0 Unknown, 142 Unchecked, 0.5s Time] [2021-12-18 22:12:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-18 22:12:28,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2021-12-18 22:12:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 106 states have (on average 1.179245283018868) internal successors, (125), 118 states have internal predecessors, (125), 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 22:12:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2021-12-18 22:12:28,061 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 54 [2021-12-18 22:12:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:12:28,061 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2021-12-18 22:12:28,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.1) internal successors, (84), 38 states have internal predecessors, (84), 5 states have call successors, (5), 3 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 22:12:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2021-12-18 22:12:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 22:12:28,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:12:28,062 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, 1] [2021-12-18 22:12:28,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-12-18 22:12:28,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-18 22:12:28,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:12:28,463 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:12:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:12:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash 729745886, now seen corresponding path program 1 times [2021-12-18 22:12:28,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:12:28,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622945519] [2021-12-18 22:12:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:12:28,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:12:28,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:12:28,464 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:12:28,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-18 22:12:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:12:28,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 22:12:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:12:28,966 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 22:12:29,177 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 22:12:29,186 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 22:12:29,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:12:29,507 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 34 [2021-12-18 22:12:29,513 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 18 [2021-12-18 22:12:29,519 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 22:12:29,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:29,947 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:12:29,947 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 37 treesize of output 43 [2021-12-18 22:12:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:29,966 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 32 treesize of output 32 [2021-12-18 22:12:29,985 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:12:29,985 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 22:12:30,216 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 33 treesize of output 21 [2021-12-18 22:12:30,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:12:30,522 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 32 treesize of output 27 [2021-12-18 22:12:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:12:30,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:12:31,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:12:31,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622945519] [2021-12-18 22:12:31,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622945519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:12:31,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774367507] [2021-12-18 22:12:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:12:31,115 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:12:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:12:31,118 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:12:31,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-12-18 22:12:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:12:31,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 22:12:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:12:32,036 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 22:12:32,355 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 22:12:32,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:12:32,940 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 25 treesize of output 16 [2021-12-18 22:12:32,947 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 22:12:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:33,240 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:12:33,241 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 31 treesize of output 37 [2021-12-18 22:12:33,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:33,253 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 14 treesize of output 16 [2021-12-18 22:12:33,271 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:12:33,271 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 22:12:33,558 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 22:12:33,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:12:33,977 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 32 treesize of output 15 [2021-12-18 22:12:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:12:33,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:12:34,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774367507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:12:34,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:12:34,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2021-12-18 22:12:34,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670935651] [2021-12-18 22:12:34,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:12:34,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 22:12:34,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:12:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 22:12:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1547, Unknown=12, NotChecked=0, Total=1722 [2021-12-18 22:12:34,332 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand has 38 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 32 states have internal predecessors, (70), 6 states have call successors, (6), 2 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 22:12:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:12:36,133 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2021-12-18 22:12:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 22:12:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 32 states have internal predecessors, (70), 6 states have call successors, (6), 2 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 56 [2021-12-18 22:12:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:12:36,135 INFO L225 Difference]: With dead ends: 121 [2021-12-18 22:12:36,135 INFO L226 Difference]: Without dead ends: 121 [2021-12-18 22:12:36,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=301, Invalid=2439, Unknown=16, NotChecked=0, Total=2756 [2021-12-18 22:12:36,135 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 42 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 22:12:36,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 856 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 447 Invalid, 0 Unknown, 86 Unchecked, 0.9s Time] [2021-12-18 22:12:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-18 22:12:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-18 22:12:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 110 states have internal predecessors, (115), 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 22:12:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2021-12-18 22:12:36,138 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 56 [2021-12-18 22:12:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:12:36,138 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2021-12-18 22:12:36,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 32 states have internal predecessors, (70), 6 states have call successors, (6), 2 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 22:12:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2021-12-18 22:12:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 22:12:36,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:12:36,139 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, 1, 1] [2021-12-18 22:12:36,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2021-12-18 22:12:36,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-12-18 22:12:36,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:12:36,544 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:12:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:12:36,544 INFO L85 PathProgramCache]: Analyzing trace with hash 294390785, now seen corresponding path program 1 times [2021-12-18 22:12:36,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:12:36,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733928679] [2021-12-18 22:12:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:12:36,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:12:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:12:36,545 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:12:36,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-18 22:12:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:12:36,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 22:12:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:12:36,946 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 22:12:36,954 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 22:12:37,006 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 22:12:37,012 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 22:12:37,263 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:12:37,263 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 22:12:37,316 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:12:37,316 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 22:12:37,545 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 22:12:37,551 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 22:12:37,753 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:12:37,754 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 22:12:37,782 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 22:12:37,783 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 23 treesize of output 25 [2021-12-18 22:12:37,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 22:12:37,981 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 22:12:38,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:12:38,447 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 37 treesize of output 16 [2021-12-18 22:12:38,452 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 22:12:38,456 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 22:12:38,521 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 22:12:39,028 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:12:39,029 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 22:12:39,036 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 22:12:39,088 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-12-18 22:12:39,089 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 49 [2021-12-18 22:12:39,102 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 15 treesize of output 11 [2021-12-18 22:12:39,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-18 22:12:39,183 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 12 treesize of output 8 [2021-12-18 22:12:39,263 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:12:39,263 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 22:12:39,924 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 22:12:41,180 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-12-18 22:12:41,180 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 61 [2021-12-18 22:12:41,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:12:41,204 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 21 treesize of output 25 [2021-12-18 22:12:43,113 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-12-18 22:12:43,113 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 123 treesize of output 59 [2021-12-18 22:12:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:12:44,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:12:49,495 INFO L354 Elim1Store]: treesize reduction 5, result has 93.8 percent of original size [2021-12-18 22:12:49,495 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 252 treesize of output 251 [2021-12-18 22:12:50,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:12:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733928679] [2021-12-18 22:12:50,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733928679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:12:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1277626387] [2021-12-18 22:12:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:12:50,356 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:12:50,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:12:50,357 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:12:50,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-12-18 22:12:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:12:50,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 22:12:50,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:12:50,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 22:12:51,018 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 22:12:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:51,490 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 22:12:51,755 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 22:12:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:12:52,534 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 22:12:53,266 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 22:12:53,288 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 22:12:53,917 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:12:53,917 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 22:12:55,890 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-12-18 22:12:55,891 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-12-18 22:12:55,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:12:55,923 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 13 treesize of output 17 [2021-12-18 22:13:04,790 INFO L354 Elim1Store]: treesize reduction 210, result has 41.5 percent of original size [2021-12-18 22:13:04,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 179 treesize of output 237 [2021-12-18 22:14:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 22:14:28,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:14:29,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:14:29,354 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 90 treesize of output 93 [2021-12-18 22:14:39,784 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:14:39,784 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 33 treesize of output 32 [2021-12-18 22:14:40,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1277626387] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:14:40,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:14:40,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21] total 50 [2021-12-18 22:14:40,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680630033] [2021-12-18 22:14:40,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:14:40,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-18 22:14:40,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:14:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-18 22:14:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=4144, Unknown=16, NotChecked=0, Total=4422 [2021-12-18 22:14:40,814 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 51 states, 48 states have (on average 2.0) internal successors, (96), 42 states have internal predecessors, (96), 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 22:14:51,070 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 22:14:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:14:51,198 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2021-12-18 22:14:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 22:14:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 2.0) internal successors, (96), 42 states have internal predecessors, (96), 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 56 [2021-12-18 22:14:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:14:51,200 INFO L225 Difference]: With dead ends: 129 [2021-12-18 22:14:51,200 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 22:14:51,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=400, Invalid=6388, Unknown=18, NotChecked=0, Total=6806 [2021-12-18 22:14:51,201 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 29 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:14:51,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 790 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 203 Invalid, 0 Unknown, 512 Unchecked, 0.5s Time] [2021-12-18 22:14:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 22:14:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-12-18 22:14:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 117 states have internal predecessors, (125), 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 22:14:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2021-12-18 22:14:51,204 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 56 [2021-12-18 22:14:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:14:51,204 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2021-12-18 22:14:51,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 2.0) internal successors, (96), 42 states have internal predecessors, (96), 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 22:14:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2021-12-18 22:14:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 22:14:51,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:14:51,204 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, 1, 1] [2021-12-18 22:14:51,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-12-18 22:14:51,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-12-18 22:14:51,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:14:51,610 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:14:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:14:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash 294390786, now seen corresponding path program 1 times [2021-12-18 22:14:51,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:14:51,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011141413] [2021-12-18 22:14:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:14:51,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:14:51,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:14:51,612 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 22:14:51,614 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 22:14:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:14:51,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 22:14:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:14:52,014 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 22:14:52,022 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 22:14:52,081 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 22:14:52,087 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 22:14:52,271 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:14:52,271 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 22:14:52,292 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:14:52,292 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 22:14:52,500 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 22:14:52,752 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:14:52,753 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 22:14:52,946 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 22:14:52,953 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 22:14:53,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:14:53,472 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 34 treesize of output 21 [2021-12-18 22:14:53,478 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 9 treesize of output 7 [2021-12-18 22:14:53,484 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 7 treesize of output 3 [2021-12-18 22:14:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:14:54,161 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 22:14:54,162 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 40 treesize of output 48 [2021-12-18 22:14:54,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:14:54,183 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 22:14:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:14:54,194 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 22:14:54,227 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 22:14:57,038 INFO L354 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2021-12-18 22:14:57,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 146 treesize of output 131 [2021-12-18 22:14:57,076 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:14:57,077 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 102 [2021-12-18 22:14:57,115 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 22:14:57,326 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-12-18 22:14:57,327 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 50 treesize of output 30 [2021-12-18 22:14:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:14:58,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:14:58,050 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 117 treesize of output 64 [2021-12-18 22:14:58,057 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 59 treesize of output 43 [2021-12-18 22:15:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:15:00,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:15:01,390 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (and (forall ((v_ArrVal_2835 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2835) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32)))))) (not (bvule .cse1 (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (not (bvule (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)) .cse1)))) is different from false [2021-12-18 22:15:01,443 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (= |c_ULTIMATE.start_sll_append_#t~mem11#1.base| (_ bv0 32))) (and (forall ((v_ArrVal_2835 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2835) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32)))))) (not (bvule .cse1 (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (not (bvule (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)) .cse1)))) is different from false [2021-12-18 22:15:01,494 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_2835 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2835) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32)))))) (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| (_ BitVec 32))) (let ((.cse2 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) (.cse1 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (bvule .cse1 (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (not (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse2))) (not (bvule .cse2 .cse1)))))) is different from false [2021-12-18 22:15:01,549 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32))))) (forall ((v_ArrVal_2835 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_2835) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| (_ BitVec 32))) (let ((.cse1 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) (.cse2 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|) .cse1))) (not (bvule .cse2 (select |c_#length| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|))) (not (bvule .cse1 .cse2)))))) is different from false [2021-12-18 22:15:01,613 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_48| (_ BitVec 32))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)))) (.cse2 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_48| (_ bv4 32))) (.cse0 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_48| (_ bv8 32)))) (or (not (bvule .cse0 (select |c_#length| .cse1))) (not (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))) (not (bvule .cse2 .cse0))))) (and (forall ((v_ArrVal_2835 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_2835) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse4 (_ bv4 32)) (bvadd .cse4 (_ bv8 32))))))) is different from false [2021-12-18 22:15:01,711 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_48| (_ BitVec 32))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)))) (.cse2 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_48| (_ bv4 32))) (.cse0 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_48| (_ bv8 32)))) (or (not (bvule .cse0 (select |c_#length| .cse1))) (not (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))) (not (bvule .cse2 .cse0))))) (not (bvule (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)) (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (and (forall ((v_ArrVal_2835 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_2835) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_ArrVal_2836 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) v_ArrVal_2836) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse4 (_ bv4 32)) (bvadd .cse4 (_ bv8 32))))))) is different from false [2021-12-18 22:15:06,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:15:06,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011141413] [2021-12-18 22:15:06,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011141413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:15:06,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [547659605] [2021-12-18 22:15:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:15:06,948 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:15:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:15:06,949 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:15:06,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-12-18 22:15:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:15:07,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 22:15:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:15:07,483 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 22:15:07,713 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 22:15:08,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:15:08,083 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 22:15:08,408 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 22:15:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:15:09,247 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 22:15:10,855 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 22:15:10,861 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 22:15:12,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:15:12,389 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 22:15:12,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:15:12,401 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 22 treesize of output 22 [2021-12-18 22:15:16,750 INFO L354 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2021-12-18 22:15:16,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 115 treesize of output 108 [2021-12-18 22:15:16,790 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:15:16,790 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 108 [2021-12-18 22:15:17,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:15:17,004 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 114 treesize of output 102 [2021-12-18 22:15:24,686 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-12-18 22:15:24,687 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 143 treesize of output 66 [2021-12-18 22:15:24,706 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 75 treesize of output 55 [2021-12-18 22:15:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:15:29,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:15:29,796 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (bvule .cse0 (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (and (forall ((v_ArrVal_2916 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2916) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32)))))) (not (bvule (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)) .cse0)))) is different from false [2021-12-18 22:15:29,850 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (= |c_ULTIMATE.start_sll_append_#t~mem11#1.base| (_ bv0 32))) (not (bvule .cse0 (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (and (forall ((v_ArrVal_2916 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2916) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32)))))) (not (bvule (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)) .cse0)))) is different from false [2021-12-18 22:15:29,905 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) (.cse1 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0) (_ bv0 32))) (not (bvule .cse1 (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (not (bvule .cse0 .cse1))))) (and (forall ((v_ArrVal_2916 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2916) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse2 (_ bv4 32)) (bvadd .cse2 (_ bv8 32))))))) is different from false [2021-12-18 22:15:29,964 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) (.cse1 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|) .cse0) (_ bv0 32))) (not (bvule .cse1 (select |c_#length| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|))) (not (bvule .cse0 .cse1))))) (and (forall ((v_ArrVal_2916 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_2916) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse2 (_ bv4 32)) (bvadd .cse2 (_ bv8 32))))))) is different from false [2021-12-18 22:15:30,040 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (and (forall ((v_ArrVal_2916 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2916) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32)))))) (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_51| (_ BitVec 32))) (let ((.cse2 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_51| (_ bv8 32))) (.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)))) (.cse4 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_51| (_ bv4 32)))) (or (not (bvule .cse2 (select |c_#length| .cse3))) (not (bvule .cse4 .cse2)) (not (= (select (select |c_#memory_$Pointer$.base| .cse3) .cse4) (_ bv0 32)))))) (not (bvule .cse5 (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (not (bvule (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)) .cse5)))) is different from false [2021-12-18 22:15:30,236 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| (_ bv8 32)))) (or (not (bvule (bvadd |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| (_ bv4 32)) .cse0)) (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_51| (_ BitVec 32))) (let ((.cse1 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_51| (_ bv8 32))) (.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (bvadd |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| (_ bv4 32)))) (.cse3 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_51| (_ bv4 32)))) (or (not (bvule .cse1 (select |c_#length| .cse2))) (not (bvule .cse3 .cse1)) (not (= (select (select |c_#memory_$Pointer$.base| .cse2) .cse3) (_ bv0 32)))))) (not (bvule .cse0 (select |c_#length| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|))) (and (forall ((v_ArrVal_2916 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (bvadd |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| (_ bv4 32))))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse4 v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse4 v_ArrVal_2916) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_ArrVal_2917 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (bvadd |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| (_ bv4 32))) v_ArrVal_2917) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse5 (_ bv4 32)) (bvadd .cse5 (_ bv8 32)))))))) is different from false [2021-12-18 22:15:30,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:15:30,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 199 [2021-12-18 22:15:30,307 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 129 treesize of output 127 [2021-12-18 22:15:30,321 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 127 treesize of output 123 [2021-12-18 22:15:38,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [547659605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:15:38,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:15:38,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27] total 57 [2021-12-18 22:15:38,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604475571] [2021-12-18 22:15:38,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:15:38,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 22:15:38,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:15:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 22:15:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4010, Unknown=102, NotChecked=1668, Total=6006 [2021-12-18 22:15:38,980 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 58 states, 55 states have (on average 1.8) internal successors, (99), 50 states have internal predecessors, (99), 6 states have call successors, (6), 5 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 22:15:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:15:50,642 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-12-18 22:15:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 22:15:50,643 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.8) internal successors, (99), 50 states have internal predecessors, (99), 6 states have call successors, (6), 5 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 56 [2021-12-18 22:15:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:15:50,643 INFO L225 Difference]: With dead ends: 128 [2021-12-18 22:15:50,643 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 22:15:50,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=507, Invalid=8350, Unknown=121, NotChecked=2364, Total=11342 [2021-12-18 22:15:50,645 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 37 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 22:15:50,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1232 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 386 Invalid, 0 Unknown, 629 Unchecked, 0.8s Time] [2021-12-18 22:15:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 22:15:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-18 22:15:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 105 states have (on average 1.180952380952381) internal successors, (124), 117 states have internal predecessors, (124), 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 22:15:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2021-12-18 22:15:50,647 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 56 [2021-12-18 22:15:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:15:50,647 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2021-12-18 22:15:50,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 1.8) internal successors, (99), 50 states have internal predecessors, (99), 6 states have call successors, (6), 5 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 22:15:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2021-12-18 22:15:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 22:15:50,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:15:50,648 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, 1, 1, 1] [2021-12-18 22:15:50,658 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 22:15:50,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-12-18 22:15:51,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:15:51,058 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:15:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:15:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash 536178444, now seen corresponding path program 1 times [2021-12-18 22:15:51,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:15:51,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413118810] [2021-12-18 22:15:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:15:51,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:15:51,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:15:51,060 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 22:15:51,062 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 22:15:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:15:51,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 22:15:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:15:51,411 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 22:15:51,419 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 22:15:51,466 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 22:15:51,472 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 22:15:51,705 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:15:51,706 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 22:15:51,744 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:15:51,745 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 22:15:52,003 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 22:15:52,008 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 22:15:52,234 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 22:15:52,234 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 23 treesize of output 25 [2021-12-18 22:15:52,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:15:52,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:15:52,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 22:15:52,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:15:52,963 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 45 treesize of output 20 [2021-12-18 22:15:52,969 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 22:15:52,973 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 22:15:53,651 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-12-18 22:15:53,651 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 3 case distinctions, treesize of input 51 treesize of output 55 [2021-12-18 22:15:53,666 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 15 treesize of output 11 [2021-12-18 22:15:53,700 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 42 treesize of output 30 [2021-12-18 22:15:53,816 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:15:53,816 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 22:15:53,825 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 22:15:53,887 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:15:53,887 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 22:15:54,589 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 22:15:55,891 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-12-18 22:15:55,891 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 58 [2021-12-18 22:15:55,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:15:55,922 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 21 treesize of output 25 [2021-12-18 22:15:58,277 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-12-18 22:15:58,277 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 115 treesize of output 51 [2021-12-18 22:15:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:15:58,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:16:09,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:16:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413118810] [2021-12-18 22:16:09,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413118810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:16:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1060161024] [2021-12-18 22:16:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:16:09,986 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:16:09,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:16:09,987 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:16:09,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-12-18 22:16:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:16:10,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 22:16:10,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:16:10,503 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 22:16:10,688 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 5 treesize of output 3 [2021-12-18 22:16:11,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:16:11,148 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 22:16:11,410 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 22:16:12,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:16:12,132 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 22:16:13,288 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 22:16:13,292 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 22:16:14,755 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:16:14,755 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 22:16:14,806 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:16:14,806 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 22:16:14,826 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 22:16:15,603 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:16:17,662 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-12-18 22:16:17,662 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 55 [2021-12-18 22:16:17,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:16:17,692 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 13 treesize of output 17 [2021-12-18 22:16:28,266 INFO L354 Elim1Store]: treesize reduction 76, result has 61.0 percent of original size [2021-12-18 22:16:28,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 163 treesize of output 191 [2021-12-18 22:16:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:16:42,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:17:33,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:17:33,410 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 88 treesize of output 91 [2021-12-18 22:18:02,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1060161024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:18:02,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:18:02,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 55 [2021-12-18 22:18:02,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190050257] [2021-12-18 22:18:02,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:18:02,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-18 22:18:02,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:18:02,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-18 22:18:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=4453, Unknown=71, NotChecked=0, Total=4830 [2021-12-18 22:18:02,237 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 55 states, 53 states have (on average 1.830188679245283) internal successors, (97), 45 states have internal predecessors, (97), 6 states have call successors, (6), 5 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 22:18:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:18:06,779 INFO L93 Difference]: Finished difference Result 135 states and 142 transitions. [2021-12-18 22:18:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 22:18:06,779 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.830188679245283) internal successors, (97), 45 states have internal predecessors, (97), 6 states have call successors, (6), 5 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 57 [2021-12-18 22:18:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:18:06,780 INFO L225 Difference]: With dead ends: 135 [2021-12-18 22:18:06,780 INFO L226 Difference]: Without dead ends: 135 [2021-12-18 22:18:06,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 96.0s TimeCoverageRelationStatistics Valid=463, Invalid=6603, Unknown=74, NotChecked=0, Total=7140 [2021-12-18 22:18:06,781 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 48 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 22:18:06,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 972 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 277 Invalid, 0 Unknown, 545 Unchecked, 0.7s Time] [2021-12-18 22:18:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-18 22:18:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 128. [2021-12-18 22:18:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 117 states have internal predecessors, (123), 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 22:18:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2021-12-18 22:18:06,788 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 57 [2021-12-18 22:18:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:18:06,788 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2021-12-18 22:18:06,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.830188679245283) internal successors, (97), 45 states have internal predecessors, (97), 6 states have call successors, (6), 5 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 22:18:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2021-12-18 22:18:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 22:18:06,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:18:06,789 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, 1, 1, 1, 1] [2021-12-18 22:18:06,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-12-18 22:18:07,002 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 22:18:07,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:18:07,195 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:18:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:18:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash -558295485, now seen corresponding path program 1 times [2021-12-18 22:18:07,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:18:07,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872163968] [2021-12-18 22:18:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:18:07,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:18:07,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:18:07,197 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 22:18:07,198 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 22:18:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:18:07,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-18 22:18:07,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:18:07,579 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 22:18:07,592 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 22:18:07,644 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 22:18:07,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-18 22:18:07,890 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:18:07,891 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 22:18:07,929 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:18:07,929 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 22:18:08,206 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 22:18:08,211 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 22:18:08,430 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 22:18:08,430 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 23 treesize of output 25 [2021-12-18 22:18:08,452 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 12 treesize of output 14 [2021-12-18 22:18:08,621 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 22:18:08,645 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 22:18:09,215 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 22:18:09,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:18:09,222 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 37 treesize of output 16 [2021-12-18 22:18:09,227 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 22:18:09,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:18:09,988 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 22:18:10,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:18:10,035 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 22:18:10,035 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 45 [2021-12-18 22:18:10,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:18:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 22:18:10,115 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 17 treesize of output 13 [2021-12-18 22:18:11,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:18:11,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:18:11,608 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 67 treesize of output 31 [2021-12-18 22:18:12,772 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-18 22:18:12,772 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 21 treesize of output 20 [2021-12-18 22:18:13,106 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 22:18:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:18:13,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:19:15,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:19:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872163968] [2021-12-18 22:19:15,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872163968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:19:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [212618114] [2021-12-18 22:19:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:19:15,694 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:19:15,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:19:15,695 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 22:19:15,696 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 22:19:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:19:16,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 22:19:16,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:19:16,285 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 22:19:16,523 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 22:19:17,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:17,127 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 22:19:17,464 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 22:19:17,738 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 22:19:18,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:18,455 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 22:19:20,467 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 37 treesize of output 21 [2021-12-18 22:19:20,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 22:19:20,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:20,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 22:19:20,493 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 22:19:22,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:22,406 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 43 treesize of output 39 [2021-12-18 22:19:22,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:22,422 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 14 treesize of output 16 [2021-12-18 22:19:22,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:22,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:22,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 26 [2021-12-18 22:19:22,471 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:19:22,471 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 22:19:27,791 INFO L354 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2021-12-18 22:19:27,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 117 treesize of output 108 [2021-12-18 22:19:27,826 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:19:27,826 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 89 [2021-12-18 22:19:27,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 22:19:27,962 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-12-18 22:19:27,963 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 50 treesize of output 30 [2021-12-18 22:19:28,949 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 40 treesize of output 20 [2021-12-18 22:19:28,957 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 22:19:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:19:30,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:19:46,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [212618114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:19:46,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:19:46,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 56 [2021-12-18 22:19:46,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139715459] [2021-12-18 22:19:46,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:19:46,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 22:19:46,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:19:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 22:19:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=5703, Unknown=97, NotChecked=0, Total=6162 [2021-12-18 22:19:46,388 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 57 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 48 states have internal predecessors, (103), 6 states have call successors, (6), 5 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 22:19:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:19:56,498 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2021-12-18 22:19:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 22:19:56,498 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 48 states have internal predecessors, (103), 6 states have call successors, (6), 5 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 58 [2021-12-18 22:19:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:19:56,499 INFO L225 Difference]: With dead ends: 130 [2021-12-18 22:19:56,499 INFO L226 Difference]: Without dead ends: 130 [2021-12-18 22:19:56,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 90.4s TimeCoverageRelationStatistics Valid=675, Invalid=9520, Unknown=107, NotChecked=0, Total=10302 [2021-12-18 22:19:56,500 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 44 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:19:56,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 473 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 202 Unchecked, 0.4s Time] [2021-12-18 22:19:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-18 22:19:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-18 22:19:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 119 states have internal predecessors, (125), 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 22:19:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2021-12-18 22:19:56,502 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 58 [2021-12-18 22:19:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:19:56,502 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2021-12-18 22:19:56,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 48 states have internal predecessors, (103), 6 states have call successors, (6), 5 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 22:19:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2021-12-18 22:19:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 22:19:56,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:19:56,503 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, 1, 1, 1, 1, 1, 1] [2021-12-18 22:19:56,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-12-18 22:19:56,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-12-18 22:19:56,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:19:56,908 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:19:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:19:56,908 INFO L85 PathProgramCache]: Analyzing trace with hash 348951848, now seen corresponding path program 1 times [2021-12-18 22:19:56,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:19:56,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827843777] [2021-12-18 22:19:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:19:56,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:19:56,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:19:56,910 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:19:56,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-12-18 22:19:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:19:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 22:19:57,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:19:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:57,350 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 22:19:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:57,408 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 22:19:57,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:57,630 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 22:19:57,630 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 28 treesize of output 45 [2021-12-18 22:19:57,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:57,987 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 22:19:58,131 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 22:19:58,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:58,386 INFO L354 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2021-12-18 22:19:58,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 65 [2021-12-18 22:19:58,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 22:19:58,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:58,746 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 21 treesize of output 20 [2021-12-18 22:19:58,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 22:19:59,679 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:19:59,679 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 97 treesize of output 48 [2021-12-18 22:19:59,688 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 22:19:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:19:59,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 38 treesize of output 30 [2021-12-18 22:19:59,708 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 22:20:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:00,247 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:20:00,247 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 83 [2021-12-18 22:20:00,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:00,260 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 18 treesize of output 20 [2021-12-18 22:20:00,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:00,276 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 22:20:00,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:00,338 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-18 22:20:00,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2021-12-18 22:20:02,662 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-18 22:20:02,662 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 113 [2021-12-18 22:20:02,696 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:20:02,696 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2021-12-18 22:20:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:02,707 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 32 treesize of output 34 [2021-12-18 22:20:03,075 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:20:03,075 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 95 treesize of output 42 [2021-12-18 22:20:03,085 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 22:20:03,416 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 22:20:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:20:03,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:20:03,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3342 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3341 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3340 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3341) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3340) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3342) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-18 22:20:03,932 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3342 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3341 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3340 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3341) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3340) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3342) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-18 22:20:03,953 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3342 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3341 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3340 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))))) (select (select (store |c_#memory_int| .cse0 v_ArrVal_3341) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3340) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3342) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-18 22:20:03,989 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3342 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3341 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3340 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (bvadd |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| (_ bv4 32))))) (select (select (store |c_#memory_int| .cse0 v_ArrVal_3341) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3340) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3342) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-18 22:20:04,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3342 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3341 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3340 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) (_ bv4 32))))) (select (select (store |c_#memory_int| .cse0 v_ArrVal_3341) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3340) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3342) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-18 22:20:04,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:20:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827843777] [2021-12-18 22:20:04,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827843777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:20:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1495645835] [2021-12-18 22:20:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:20:04,548 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:20:04,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:20:04,549 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:20:04,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-12-18 22:20:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:20:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-18 22:20:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:20:05,127 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 22:20:05,282 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 22:20:05,378 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 22:20:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:05,739 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 22:20:06,400 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 22:20:06,411 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 22:20:06,949 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 22:20:07,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:07,553 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 22:20:07,594 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:20:07,594 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 22:20:08,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:08,180 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 22:20:08,190 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 22:20:09,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:20:09,672 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 83 treesize of output 42 [2021-12-18 22:20:09,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 14 [2021-12-18 22:20:09,692 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 22:20:09,699 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 22:20:09,706 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 22:20:11,720 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:20:11,720 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 22:20:11,728 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 22:20:11,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:11,797 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:20:11,797 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 89 treesize of output 75 [2021-12-18 22:20:11,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:11,822 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 18 treesize of output 20 [2021-12-18 22:20:11,881 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-18 22:20:11,881 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 35 treesize of output 37 [2021-12-18 22:20:12,138 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:20:12,139 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 22:20:18,970 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-18 22:20:18,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 178 treesize of output 127 [2021-12-18 22:20:19,026 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:20:19,026 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 68 [2021-12-18 22:20:19,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:19,051 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 32 treesize of output 34 [2021-12-18 22:20:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:19,077 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 27 treesize of output 9 [2021-12-18 22:20:21,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:20:21,205 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 81 treesize of output 36 [2021-12-18 22:20:21,218 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 15 treesize of output 7 [2021-12-18 22:20:23,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-18 22:20:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:20:23,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:20:25,041 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) (.cse1 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0) (_ bv0 32))) (not (bvule .cse1 (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (not (bvule .cse0 .cse1))))) (forall ((v_ArrVal_3438 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3438) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3436) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-18 22:20:25,079 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_3438 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3438) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3437) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3436) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) (.cse1 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|) .cse0) (_ bv0 32))) (not (bvule .cse1 (select |c_#length| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|))) (not (bvule .cse0 .cse1)))))) is different from false [2021-12-18 22:20:25,125 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_69| (_ BitVec 32))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)))) (.cse2 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_69| (_ bv4 32))) (.cse0 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_69| (_ bv8 32)))) (or (not (bvule .cse0 (select |c_#length| .cse1))) (not (= (select (select |c_#memory_$Pointer$.base| .cse1) .cse2) (_ bv0 32))) (not (bvule .cse2 .cse0))))) (forall ((v_ArrVal_3438 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))))) (select (select (store |c_#memory_int| .cse3 v_ArrVal_3438) (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_3437) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_3436) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2021-12-18 22:20:25,236 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_69| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (bvadd |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| (_ bv4 32)))) (.cse1 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_69| (_ bv4 32))) (.cse2 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_69| (_ bv8 32)))) (or (not (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) (_ bv0 32))) (not (bvule .cse2 (select |c_#length| .cse0))) (not (bvule .cse1 .cse2))))) (forall ((v_ArrVal_3438 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (bvadd |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| (_ bv4 32))))) (select (select (store |c_#memory_int| .cse3 v_ArrVal_3438) (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_3437) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_3436) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2021-12-18 22:20:25,286 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_69| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) (_ bv4 32)))) (.cse1 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_69| (_ bv4 32))) (.cse2 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_69| (_ bv8 32)))) (or (not (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) (_ bv0 32))) (not (bvule .cse2 (select |c_#length| .cse0))) (not (bvule .cse1 .cse2))))) (forall ((v_ArrVal_3438 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3437 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3436 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) (_ bv4 32))))) (select (select (store |c_#memory_int| .cse3 v_ArrVal_3438) (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_3437) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_3436) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2021-12-18 22:20:29,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1495645835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:20:29,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:20:29,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 35] total 64 [2021-12-18 22:20:29,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139532557] [2021-12-18 22:20:29,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:20:29,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 22:20:29,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:20:29,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 22:20:29,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=4860, Unknown=45, NotChecked=1490, Total=6642 [2021-12-18 22:20:29,182 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand has 64 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 54 states have internal predecessors, (106), 6 states have call successors, (6), 5 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 22:20:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:20:45,025 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2021-12-18 22:20:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 22:20:45,026 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 54 states have internal predecessors, (106), 6 states have call successors, (6), 5 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 22:20:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:20:45,026 INFO L225 Difference]: With dead ends: 131 [2021-12-18 22:20:45,026 INFO L226 Difference]: Without dead ends: 131 [2021-12-18 22:20:45,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=533, Invalid=9354, Unknown=53, NotChecked=2050, Total=11990 [2021-12-18 22:20:45,027 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 22:20:45,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1222 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 608 Invalid, 0 Unknown, 454 Unchecked, 1.7s Time] [2021-12-18 22:20:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-18 22:20:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-18 22:20:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 108 states have (on average 1.1666666666666667) internal successors, (126), 120 states have internal predecessors, (126), 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 22:20:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 138 transitions. [2021-12-18 22:20:45,030 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 138 transitions. Word has length 60 [2021-12-18 22:20:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:20:45,030 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 138 transitions. [2021-12-18 22:20:45,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 54 states have internal predecessors, (106), 6 states have call successors, (6), 5 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 22:20:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 138 transitions. [2021-12-18 22:20:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 22:20:45,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:20:45,031 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:20:45,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-12-18 22:20:45,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-12-18 22:20:45,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:20:45,433 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:20:45,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:20:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2067394117, now seen corresponding path program 1 times [2021-12-18 22:20:45,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:20:45,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656988047] [2021-12-18 22:20:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:20:45,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:20:45,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:20:45,436 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:20:45,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-12-18 22:20:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:20:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 22:20:45,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:20:45,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:45,914 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 22:20:45,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:45,960 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 16 treesize of output 12 [2021-12-18 22:20:46,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:46,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:46,187 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:20:46,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-12-18 22:20:46,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:46,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 25 treesize of output 19 [2021-12-18 22:20:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:46,920 INFO L354 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2021-12-18 22:20:46,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 63 [2021-12-18 22:20:47,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 22:20:47,393 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 6 treesize of output 5 [2021-12-18 22:20:48,375 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:20:48,375 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 97 treesize of output 44 [2021-12-18 22:20:48,384 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 22:20:48,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:48,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-12-18 22:20:48,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:48,981 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:20:48,982 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 79 [2021-12-18 22:20:48,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:48,995 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 22:20:49,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:49,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:49,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:49,055 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-18 22:20:49,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2021-12-18 22:20:52,053 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-18 22:20:52,053 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 110 [2021-12-18 22:20:52,091 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:20:52,091 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 50 [2021-12-18 22:20:52,602 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 36 treesize of output 24 [2021-12-18 22:20:54,103 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 22:20:54,103 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 114 treesize of output 45 [2021-12-18 22:20:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:20:55,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:20:55,856 INFO L354 Elim1Store]: treesize reduction 5, result has 83.9 percent of original size [2021-12-18 22:20:55,856 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 39 treesize of output 38 [2021-12-18 22:20:55,871 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3527 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3526 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_append_~last~0#1.base| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3527))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3526) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32))))) is different from false [2021-12-18 22:20:55,894 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3527 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3526 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_append_#t~mem10#1.base| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3527))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3526) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32))))) is different from false [2021-12-18 22:20:55,910 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3527 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3526 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))))) (= .cse0 (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3527))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3526) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) is different from false [2021-12-18 22:20:55,939 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3527 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3526 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (bvadd |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| (_ bv4 32))))) (= .cse0 (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3527))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3526) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) is different from false [2021-12-18 22:20:55,957 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3527 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3526 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) (_ bv4 32))))) (= .cse0 (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3527))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3526) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) is different from false [2021-12-18 22:20:56,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:20:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656988047] [2021-12-18 22:20:56,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656988047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:20:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591397315] [2021-12-18 22:20:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:20:56,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:20:56,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:20:56,469 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:20:56,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-12-18 22:20:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:20:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 22:20:57,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:20:57,068 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 22:20:57,231 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 22:20:57,359 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 22:20:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:57,840 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 22:20:58,484 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 22:20:58,493 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 22:20:59,307 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:20:59,307 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 22:20:59,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:20:59,333 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 12 treesize of output 14 [2021-12-18 22:20:59,911 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 22:21:01,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:21:01,351 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 72 treesize of output 35 [2021-12-18 22:21:01,359 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 22:21:01,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 14 [2021-12-18 22:21:01,374 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 22:21:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:03,130 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:21:03,130 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 66 [2021-12-18 22:21:03,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:03,150 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 22:21:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:03,169 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 14 treesize of output 16 [2021-12-18 22:21:03,216 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-18 22:21:03,216 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 35 treesize of output 37 [2021-12-18 22:21:09,900 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-18 22:21:09,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 168 treesize of output 119 [2021-12-18 22:21:09,969 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:21:09,969 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 69 [2021-12-18 22:21:10,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:10,015 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 27 treesize of output 9 [2021-12-18 22:21:11,030 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 36 treesize of output 24 [2021-12-18 22:21:12,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:21:12,672 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 89 treesize of output 36 [2021-12-18 22:21:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:21:15,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:21:16,007 INFO L354 Elim1Store]: treesize reduction 5, result has 83.9 percent of original size [2021-12-18 22:21:16,007 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 39 treesize of output 38 [2021-12-18 22:21:17,063 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| (_ BitVec 32))) (let ((.cse1 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) (.cse0 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (bvule .cse0 (select |c_#length| |c_ULTIMATE.start_sll_append_~last~0#1.base|))) (not (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse1))) (not (bvule .cse1 .cse0))))) (forall ((v_ArrVal_3611 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3610 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_append_~last~0#1.base| (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3611))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3610) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) is different from false [2021-12-18 22:21:17,094 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))) (.cse1 (bvadd |ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv8 32)))) (or (not (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|) .cse0))) (not (bvule .cse1 (select |c_#length| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|))) (not (bvule .cse0 .cse1))))) (forall ((v_ArrVal_3611 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3610 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_append_#t~mem10#1.base| (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3611))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| v_ArrVal_3610) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) is different from false [2021-12-18 22:21:17,131 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_3611 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3610 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32))))) (= .cse0 (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3611))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3610) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_74| (_ BitVec 32))) (let ((.cse3 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_74| (_ bv8 32))) (.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd |c_ULTIMATE.start_sll_append_~last~0#1.offset| (_ bv4 32)))) (.cse2 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_74| (_ bv4 32)))) (or (not (bvule .cse2 .cse3)) (not (bvule .cse3 (select |c_#length| .cse4))) (not (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| .cse4) .cse2))))))) is different from false [2021-12-18 22:21:18,135 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_74| (_ BitVec 32))) (let ((.cse0 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_74| (_ bv4 32))) (.cse1 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_74| (_ bv8 32))) (.cse2 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) (_ bv4 32))))) (or (not (bvule .cse0 .cse1)) (not (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| .cse2) .cse0))) (not (bvule .cse1 (select |c_#length| .cse2)))))) (forall ((v_ArrVal_3611 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3610 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) (_ bv4 32))))) (= .cse3 (select (let ((.cse4 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_3611))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_3610) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32))))))) is different from false [2021-12-18 22:21:19,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591397315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:21:19,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:21:19,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34] total 66 [2021-12-18 22:21:19,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025555701] [2021-12-18 22:21:19,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:21:19,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 22:21:19,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:21:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 22:21:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5678, Unknown=109, NotChecked=1440, Total=7482 [2021-12-18 22:21:19,492 INFO L87 Difference]: Start difference. First operand 131 states and 138 transitions. Second operand has 67 states, 64 states have (on average 1.71875) internal successors, (110), 57 states have internal predecessors, (110), 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 22:21:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:21:34,474 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2021-12-18 22:21:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 22:21:34,474 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 64 states have (on average 1.71875) internal successors, (110), 57 states have internal predecessors, (110), 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 61 [2021-12-18 22:21:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:21:34,475 INFO L225 Difference]: With dead ends: 133 [2021-12-18 22:21:34,475 INFO L226 Difference]: Without dead ends: 133 [2021-12-18 22:21:34,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=551, Invalid=11319, Unknown=156, NotChecked=2016, Total=14042 [2021-12-18 22:21:34,476 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 45 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 769 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 22:21:34,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1355 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 344 Invalid, 0 Unknown, 769 Unchecked, 0.8s Time] [2021-12-18 22:21:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-18 22:21:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-18 22:21:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 122 states have internal predecessors, (130), 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 22:21:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2021-12-18 22:21:34,478 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 61 [2021-12-18 22:21:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:21:34,478 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2021-12-18 22:21:34,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 64 states have (on average 1.71875) internal successors, (110), 57 states have internal predecessors, (110), 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 22:21:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2021-12-18 22:21:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 22:21:34,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:21:34,479 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:21:34,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2021-12-18 22:21:34,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-12-18 22:21:34,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:21:34,885 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:21:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:21:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2067394116, now seen corresponding path program 1 times [2021-12-18 22:21:34,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:21:34,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775969998] [2021-12-18 22:21:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:21:34,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:21:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:21:34,896 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:21:34,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-12-18 22:21:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:21:35,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-18 22:21:35,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:21:35,482 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 22:21:35,492 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 22:21:35,523 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 22:21:35,527 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 22:21:35,695 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:21:35,696 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 22:21:35,708 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 22:21:35,903 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 22:21:35,907 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 22:21:36,130 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 22:21:36,130 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 23 treesize of output 25 [2021-12-18 22:21:36,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:21:36,368 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 22:21:36,389 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 22:21:36,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:21:36,961 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 46 treesize of output 21 [2021-12-18 22:21:36,975 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:21:36,975 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 11 treesize of output 11 [2021-12-18 22:21:36,979 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 22:21:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:37,533 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 22:21:37,534 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 52 treesize of output 52 [2021-12-18 22:21:37,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:37,553 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 22:21:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:37,587 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-18 22:21:37,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 21 treesize of output 26 [2021-12-18 22:21:37,672 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 17 treesize of output 13 [2021-12-18 22:21:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:41,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:21:41,404 INFO L354 Elim1Store]: treesize reduction 126, result has 22.7 percent of original size [2021-12-18 22:21:41,405 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 7 new quantified variables, introduced 9 case distinctions, treesize of input 272 treesize of output 157 [2021-12-18 22:21:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:41,440 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-12-18 22:21:41,441 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 94 [2021-12-18 22:21:46,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:21:46,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:21:46,238 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 163 treesize of output 83 [2021-12-18 22:21:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:21:46,260 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:21:46,260 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 38 [2021-12-18 22:21:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:21:50,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:22:09,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:22:09,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775969998] [2021-12-18 22:22:09,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775969998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:22:09,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1825192499] [2021-12-18 22:22:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:22:09,597 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:22:09,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:22:09,598 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:22:09,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-12-18 22:22:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:22:10,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-18 22:22:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:22:10,398 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 22:22:10,803 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 22:22:12,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:12,165 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 22:22:13,491 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 22:22:13,917 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 22:22:15,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:15,070 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 22:22:16,137 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 22:22:16,150 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 22:22:18,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:22:18,634 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 60 treesize of output 31 [2021-12-18 22:22:18,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:18,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 22:22:18,652 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 22:22:18,659 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 8 treesize of output 6 [2021-12-18 22:22:21,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:21,680 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-18 22:22:21,680 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 66 treesize of output 60 [2021-12-18 22:22:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:21,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 26 [2021-12-18 22:22:21,729 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:22:21,729 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 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 22:22:21,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:21,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 22:22:31,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:31,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:22:31,404 INFO L354 Elim1Store]: treesize reduction 145, result has 11.0 percent of original size [2021-12-18 22:22:31,404 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 7 new quantified variables, introduced 9 case distinctions, treesize of input 273 treesize of output 139 [2021-12-18 22:22:31,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:31,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:31,457 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-12-18 22:22:31,457 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 127 [2021-12-18 22:22:38,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:22:38,401 INFO L354 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2021-12-18 22:22:38,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 246 treesize of output 131 [2021-12-18 22:22:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:22:38,414 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 39 [2021-12-18 22:22:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:22:50,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:23:23,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1825192499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:23:23,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:23:23,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35] total 67 [2021-12-18 22:23:23,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642495536] [2021-12-18 22:23:23,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:23:23,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-18 22:23:23,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:23:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-18 22:23:23,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=7772, Unknown=82, NotChecked=0, Total=8190 [2021-12-18 22:23:23,523 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand has 68 states, 65 states have (on average 1.676923076923077) internal successors, (109), 58 states have internal predecessors, (109), 6 states have call successors, (6), 5 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 22:23:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:23:36,664 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2021-12-18 22:23:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 22:23:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 1.676923076923077) internal successors, (109), 58 states have internal predecessors, (109), 6 states have call successors, (6), 5 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 61 [2021-12-18 22:23:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:23:36,665 INFO L225 Difference]: With dead ends: 133 [2021-12-18 22:23:36,665 INFO L226 Difference]: Without dead ends: 133 [2021-12-18 22:23:36,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 95.6s TimeCoverageRelationStatistics Valid=481, Invalid=10139, Unknown=92, NotChecked=0, Total=10712 [2021-12-18 22:23:36,666 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 42 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 645 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 22:23:36,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1136 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 351 Invalid, 0 Unknown, 645 Unchecked, 0.9s Time] [2021-12-18 22:23:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-18 22:23:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-18 22:23:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 122 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 22:23:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2021-12-18 22:23:36,668 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 61 [2021-12-18 22:23:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:23:36,668 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2021-12-18 22:23:36,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 1.676923076923077) internal successors, (109), 58 states have internal predecessors, (109), 6 states have call successors, (6), 5 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 22:23:36,668 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2021-12-18 22:23:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 22:23:36,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:23:36,669 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:23:36,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-12-18 22:23:36,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-12-18 22:23:37,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:23:37,082 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-18 22:23:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:23:37,082 INFO L85 PathProgramCache]: Analyzing trace with hash 335290514, now seen corresponding path program 1 times [2021-12-18 22:23:37,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:23:37,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703003329] [2021-12-18 22:23:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:23:37,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:23:37,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:23:37,084 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:23:37,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-12-18 22:23:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:23:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 22:23:37,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:23:37,528 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 22:23:37,552 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 22:23:37,746 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:23:37,746 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 22:23:37,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 14 [2021-12-18 22:23:38,227 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 22:23:38,227 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 4 case distinctions, treesize of input 29 treesize of output 46 [2021-12-18 22:23:38,441 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 22:23:38,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 Killed by 15