./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/verifythis/duplets.c -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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:12:37,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:12:37,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:12:37,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:12:37,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:12:37,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:12:37,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:12:37,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:12:37,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:12:37,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:12:37,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:12:37,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:12:37,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:12:37,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:12:37,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:12:37,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:12:37,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:12:37,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:12:37,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:12:37,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:12:37,523 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:12:37,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:12:37,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:12:37,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:12:37,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:12:37,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:12:37,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:12:37,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:12:37,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:12:37,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:12:37,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:12:37,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:12:37,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:12:37,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:12:37,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:12:37,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:12:37,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:12:37,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:12:37,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:12:37,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:12:37,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:12:37,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:12:37,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:12:37,557 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:12:37,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:12:37,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:12:37,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:12:37,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:12:37,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:12:37,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:12:37,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:12:37,561 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:12:37,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:12:37,562 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:12:37,562 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:12:37,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:12:37,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:12:37,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:12:37,562 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:12:37,563 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:12:37,563 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:12:37,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:12:37,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:12:37,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:12:37,564 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:12:37,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:12:37,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:12:37,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:12:37,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:12:37,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:12:37,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:12:37,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:12:37,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:12:37,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-07-14 06:12:37,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:12:37,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:12:37,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:12:37,809 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:12:37,810 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:12:37,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/duplets.c [2022-07-14 06:12:37,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78a427e68/a41278f3ace34d549e0fe1d36523aa58/FLAG3afa05d27 [2022-07-14 06:12:38,259 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:12:38,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/duplets.c [2022-07-14 06:12:38,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78a427e68/a41278f3ace34d549e0fe1d36523aa58/FLAG3afa05d27 [2022-07-14 06:12:38,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78a427e68/a41278f3ace34d549e0fe1d36523aa58 [2022-07-14 06:12:38,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:12:38,284 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:12:38,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:12:38,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:12:38,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:12:38,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@339f03f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38, skipping insertion in model container [2022-07-14 06:12:38,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:12:38,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:12:38,461 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/verifythis/duplets.c[485,498] [2022-07-14 06:12:38,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:12:38,505 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:12:38,514 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/verifythis/duplets.c[485,498] [2022-07-14 06:12:38,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:12:38,550 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:12:38,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38 WrapperNode [2022-07-14 06:12:38,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:12:38,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:12:38,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:12:38,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:12:38,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,606 INFO L137 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2022-07-14 06:12:38,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:12:38,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:12:38,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:12:38,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:12:38,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:12:38,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:12:38,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:12:38,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:12:38,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (1/1) ... [2022-07-14 06:12:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:12:38,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:38,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:12:38,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:12:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:12:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-14 06:12:38,707 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-14 06:12:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 06:12:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:12:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:12:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:12:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:12:38,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:12:38,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:12:38,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-14 06:12:38,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-14 06:12:38,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:12:38,795 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:12:38,797 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:12:39,167 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:12:39,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:12:39,172 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-14 06:12:39,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:12:39 BoogieIcfgContainer [2022-07-14 06:12:39,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:12:39,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:12:39,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:12:39,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:12:39,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:12:38" (1/3) ... [2022-07-14 06:12:39,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a0e7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:12:39, skipping insertion in model container [2022-07-14 06:12:39,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:12:38" (2/3) ... [2022-07-14 06:12:39,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a0e7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:12:39, skipping insertion in model container [2022-07-14 06:12:39,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:12:39" (3/3) ... [2022-07-14 06:12:39,179 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-07-14 06:12:39,190 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:12:39,191 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2022-07-14 06:12:39,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:12:39,224 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@13eb116, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32ce946 [2022-07-14 06:12:39,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-07-14 06:12:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:12:39,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:39,232 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:39,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash 802624587, now seen corresponding path program 1 times [2022-07-14 06:12:39,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:39,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246217331] [2022-07-14 06:12:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:39,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:39,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246217331] [2022-07-14 06:12:39,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246217331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:39,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:39,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:12:39,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440233436] [2022-07-14 06:12:39,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:39,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-14 06:12:39,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-14 06:12:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:12:39,459 INFO L87 Difference]: Start difference. First operand has 101 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:39,481 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-07-14 06:12:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-14 06:12:39,483 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-07-14 06:12:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:39,490 INFO L225 Difference]: With dead ends: 101 [2022-07-14 06:12:39,490 INFO L226 Difference]: Without dead ends: 99 [2022-07-14 06:12:39,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:12:39,496 INFO L413 NwaCegarLoop]: 112 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, 112 SdHoareTripleChecker+Invalid, 0 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 [2022-07-14 06:12:39,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-14 06:12:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-14 06:12:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 51 states have (on average 1.803921568627451) internal successors, (92), 87 states have internal predecessors, (92), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2022-07-14 06:12:39,535 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 26 [2022-07-14 06:12:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:39,536 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2022-07-14 06:12:39,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2022-07-14 06:12:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:12:39,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:39,538 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:39,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:12:39,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash -649564341, now seen corresponding path program 1 times [2022-07-14 06:12:39,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:39,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760891755] [2022-07-14 06:12:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:39,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:39,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:39,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760891755] [2022-07-14 06:12:39,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760891755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:39,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:39,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:12:39,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015941883] [2022-07-14 06:12:39,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:39,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:12:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:12:39,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:12:39,649 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:39,779 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-07-14 06:12:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:12:39,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-07-14 06:12:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:39,784 INFO L225 Difference]: With dead ends: 97 [2022-07-14 06:12:39,784 INFO L226 Difference]: Without dead ends: 97 [2022-07-14 06:12:39,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:12:39,786 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 150 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:39,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 92 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:12:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-14 06:12:39,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-07-14 06:12:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 85 states have internal predecessors, (90), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2022-07-14 06:12:39,803 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 26 [2022-07-14 06:12:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:39,805 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2022-07-14 06:12:39,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2022-07-14 06:12:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:12:39,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:39,807 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:39,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:12:39,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash -649564340, now seen corresponding path program 1 times [2022-07-14 06:12:39,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:39,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534432067] [2022-07-14 06:12:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:39,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:40,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:12:40,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:40,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534432067] [2022-07-14 06:12:40,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534432067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:40,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582121066] [2022-07-14 06:12:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:40,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:40,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:40,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:12:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:40,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 06:12:40,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:40,149 INFO L390 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 [2022-07-14 06:12:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 06:12:40,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:12:41,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582121066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:41,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:41,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-07-14 06:12:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117539518] [2022-07-14 06:12:41,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:41,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:12:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:12:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:12:41,576 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-14 06:12:41,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:41,739 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-07-14 06:12:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:12:41,740 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 26 [2022-07-14 06:12:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:41,740 INFO L225 Difference]: With dead ends: 100 [2022-07-14 06:12:41,741 INFO L226 Difference]: Without dead ends: 100 [2022-07-14 06:12:41,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:12:41,742 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 16 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:41,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 474 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-07-14 06:12:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-14 06:12:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-07-14 06:12:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 87 states have internal predecessors, (92), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2022-07-14 06:12:41,748 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 26 [2022-07-14 06:12:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:41,748 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2022-07-14 06:12:41,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-14 06:12:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2022-07-14 06:12:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:12:41,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:41,749 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:41,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-14 06:12:41,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:41,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1338341894, now seen corresponding path program 1 times [2022-07-14 06:12:41,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:41,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030382433] [2022-07-14 06:12:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:12:42,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030382433] [2022-07-14 06:12:42,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030382433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:42,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763582792] [2022-07-14 06:12:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:42,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:42,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:42,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:42,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:12:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 06:12:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:42,140 INFO L390 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 [2022-07-14 06:12:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:42,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:12:42,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763582792] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:42,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:42,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-07-14 06:12:42,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977900447] [2022-07-14 06:12:42,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:42,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:12:42,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:12:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:12:42,377 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-14 06:12:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:42,531 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-07-14 06:12:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:12:42,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 27 [2022-07-14 06:12:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:42,534 INFO L225 Difference]: With dead ends: 103 [2022-07-14 06:12:42,534 INFO L226 Difference]: Without dead ends: 103 [2022-07-14 06:12:42,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:12:42,537 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 10 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:42,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 511 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-07-14 06:12:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-14 06:12:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-07-14 06:12:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 89 states have internal predecessors, (94), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2022-07-14 06:12:42,550 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 27 [2022-07-14 06:12:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:42,550 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2022-07-14 06:12:42,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-14 06:12:42,551 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2022-07-14 06:12:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:12:42,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:42,552 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:42,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:42,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-14 06:12:42,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1665569650, now seen corresponding path program 1 times [2022-07-14 06:12:42,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:42,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888081596] [2022-07-14 06:12:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:42,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:42,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:42,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888081596] [2022-07-14 06:12:42,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888081596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:42,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:42,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:12:42,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172378955] [2022-07-14 06:12:42,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:42,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:12:42,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:42,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:12:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:12:42,834 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:42,922 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-07-14 06:12:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:12:42,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-07-14 06:12:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:42,923 INFO L225 Difference]: With dead ends: 98 [2022-07-14 06:12:42,923 INFO L226 Difference]: Without dead ends: 98 [2022-07-14 06:12:42,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:12:42,924 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 265 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:42,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 97 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:12:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-14 06:12:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-14 06:12:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 84 states have internal predecessors, (89), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2022-07-14 06:12:42,937 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 31 [2022-07-14 06:12:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:42,937 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2022-07-14 06:12:42,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2022-07-14 06:12:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:12:42,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:42,938 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:42,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:12:42,938 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:42,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1665569649, now seen corresponding path program 1 times [2022-07-14 06:12:42,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:42,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318812090] [2022-07-14 06:12:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:42,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:43,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318812090] [2022-07-14 06:12:43,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318812090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:43,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:43,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:12:43,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456632910] [2022-07-14 06:12:43,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:43,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:12:43,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:43,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:12:43,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:12:43,015 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:43,182 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2022-07-14 06:12:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:12:43,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-07-14 06:12:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:43,184 INFO L225 Difference]: With dead ends: 163 [2022-07-14 06:12:43,184 INFO L226 Difference]: Without dead ends: 163 [2022-07-14 06:12:43,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:12:43,186 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 323 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:43,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 162 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:12:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-14 06:12:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 103. [2022-07-14 06:12:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2022-07-14 06:12:43,198 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 31 [2022-07-14 06:12:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:43,198 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2022-07-14 06:12:43,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2022-07-14 06:12:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:12:43,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:43,199 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:43,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 06:12:43,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:43,200 INFO L85 PathProgramCache]: Analyzing trace with hash -93051589, now seen corresponding path program 1 times [2022-07-14 06:12:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121984854] [2022-07-14 06:12:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:43,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:43,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121984854] [2022-07-14 06:12:43,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121984854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:43,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:43,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:12:43,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284395867] [2022-07-14 06:12:43,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:12:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:12:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:12:43,334 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:43,807 INFO L93 Difference]: Finished difference Result 209 states and 233 transitions. [2022-07-14 06:12:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:12:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-07-14 06:12:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:43,809 INFO L225 Difference]: With dead ends: 209 [2022-07-14 06:12:43,809 INFO L226 Difference]: Without dead ends: 209 [2022-07-14 06:12:43,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:12:43,810 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 467 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:43,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 196 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:12:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-14 06:12:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2022-07-14 06:12:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 88 states have internal predecessors, (96), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-07-14 06:12:43,815 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 32 [2022-07-14 06:12:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:43,815 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-07-14 06:12:43,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-07-14 06:12:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:12:43,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:43,816 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:43,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 06:12:43,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1505969179, now seen corresponding path program 1 times [2022-07-14 06:12:43,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:43,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495673144] [2022-07-14 06:12:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:43,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:43,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:43,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495673144] [2022-07-14 06:12:43,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495673144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:43,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:43,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:12:43,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715571100] [2022-07-14 06:12:43,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:43,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:12:43,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:43,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:12:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:12:43,883 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:44,075 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2022-07-14 06:12:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:12:44,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-14 06:12:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:44,076 INFO L225 Difference]: With dead ends: 159 [2022-07-14 06:12:44,076 INFO L226 Difference]: Without dead ends: 159 [2022-07-14 06:12:44,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:12:44,076 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 146 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:44,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 454 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:12:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-14 06:12:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 102. [2022-07-14 06:12:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.507936507936508) internal successors, (95), 88 states have internal predecessors, (95), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2022-07-14 06:12:44,080 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 35 [2022-07-14 06:12:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:44,081 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2022-07-14 06:12:44,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:12:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2022-07-14 06:12:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:12:44,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:44,082 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:44,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:12:44,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash 770561975, now seen corresponding path program 1 times [2022-07-14 06:12:44,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:44,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104009897] [2022-07-14 06:12:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:44,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:44,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:44,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104009897] [2022-07-14 06:12:44,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104009897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:44,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739098068] [2022-07-14 06:12:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:44,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:44,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:44,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:44,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:12:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:12:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:44,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:12:44,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739098068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:44,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:12:44,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2022-07-14 06:12:44,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733417177] [2022-07-14 06:12:44,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:44,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:12:44,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:44,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:12:44,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:12:44,192 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:44,238 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2022-07-14 06:12:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:12:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-07-14 06:12:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:44,240 INFO L225 Difference]: With dead ends: 271 [2022-07-14 06:12:44,240 INFO L226 Difference]: Without dead ends: 271 [2022-07-14 06:12:44,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:12:44,242 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 293 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:44,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 318 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-14 06:12:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 106. [2022-07-14 06:12:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.507462686567164) internal successors, (101), 92 states have internal predecessors, (101), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2022-07-14 06:12:44,248 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 34 [2022-07-14 06:12:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:44,248 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2022-07-14 06:12:44,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2022-07-14 06:12:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:12:44,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:44,250 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:44,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:44,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:44,470 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 771735643, now seen corresponding path program 1 times [2022-07-14 06:12:44,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:44,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392322436] [2022-07-14 06:12:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:44,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:44,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:44,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392322436] [2022-07-14 06:12:44,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392322436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:44,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:44,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:12:44,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299041411] [2022-07-14 06:12:44,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:44,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:12:44,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:44,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:12:44,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:12:44,514 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:44,538 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2022-07-14 06:12:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:12:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-07-14 06:12:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:44,540 INFO L225 Difference]: With dead ends: 105 [2022-07-14 06:12:44,540 INFO L226 Difference]: Without dead ends: 105 [2022-07-14 06:12:44,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:12:44,540 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 57 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:44,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 91 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-14 06:12:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-14 06:12:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.492537313432836) internal successors, (100), 91 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2022-07-14 06:12:44,544 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 34 [2022-07-14 06:12:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:44,544 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2022-07-14 06:12:44,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2022-07-14 06:12:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:12:44,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:44,545 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:44,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 06:12:44,546 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash 771735644, now seen corresponding path program 1 times [2022-07-14 06:12:44,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:44,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150129074] [2022-07-14 06:12:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:44,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:44,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:44,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150129074] [2022-07-14 06:12:44,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150129074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:44,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:44,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:12:44,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847898454] [2022-07-14 06:12:44,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:44,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:12:44,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:44,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:12:44,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:12:44,581 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:44,607 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2022-07-14 06:12:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:12:44,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-07-14 06:12:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:44,609 INFO L225 Difference]: With dead ends: 104 [2022-07-14 06:12:44,609 INFO L226 Difference]: Without dead ends: 104 [2022-07-14 06:12:44,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:12:44,609 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:44,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 89 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-14 06:12:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-14 06:12:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 90 states have internal predecessors, (99), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2022-07-14 06:12:44,613 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 34 [2022-07-14 06:12:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:44,613 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2022-07-14 06:12:44,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2022-07-14 06:12:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:12:44,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:44,614 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:44,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 06:12:44,614 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:44,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1845998826, now seen corresponding path program 1 times [2022-07-14 06:12:44,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:44,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593442045] [2022-07-14 06:12:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:44,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:44,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593442045] [2022-07-14 06:12:44,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593442045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:44,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:44,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:12:44,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777739065] [2022-07-14 06:12:44,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:44,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:12:44,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:44,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:12:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:12:44,653 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:44,678 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2022-07-14 06:12:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:12:44,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-07-14 06:12:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:44,679 INFO L225 Difference]: With dead ends: 103 [2022-07-14 06:12:44,679 INFO L226 Difference]: Without dead ends: 103 [2022-07-14 06:12:44,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:12:44,679 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 54 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:44,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 90 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-14 06:12:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-07-14 06:12:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.462686567164179) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2022-07-14 06:12:44,683 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 35 [2022-07-14 06:12:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:44,683 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2022-07-14 06:12:44,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2022-07-14 06:12:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:12:44,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:44,684 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:44,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-14 06:12:44,685 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1845998825, now seen corresponding path program 1 times [2022-07-14 06:12:44,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:44,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917287109] [2022-07-14 06:12:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:44,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:44,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:44,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917287109] [2022-07-14 06:12:44,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917287109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:44,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:44,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:12:44,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106052397] [2022-07-14 06:12:44,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:44,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:12:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:44,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:12:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:12:44,734 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:44,762 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-07-14 06:12:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:12:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-07-14 06:12:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:44,763 INFO L225 Difference]: With dead ends: 102 [2022-07-14 06:12:44,763 INFO L226 Difference]: Without dead ends: 102 [2022-07-14 06:12:44,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:12:44,764 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 55 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:44,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 88 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-14 06:12:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-14 06:12:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 88 states have internal predecessors, (97), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-07-14 06:12:44,767 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 35 [2022-07-14 06:12:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:44,767 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-07-14 06:12:44,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-07-14 06:12:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-14 06:12:44,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:44,768 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:44,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-14 06:12:44,768 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:44,769 INFO L85 PathProgramCache]: Analyzing trace with hash 385735491, now seen corresponding path program 1 times [2022-07-14 06:12:44,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:44,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928515874] [2022-07-14 06:12:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:44,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:44,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:12:45,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:45,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928515874] [2022-07-14 06:12:45,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928515874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:45,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:45,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-14 06:12:45,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077788980] [2022-07-14 06:12:45,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:45,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:12:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:12:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:12:45,016 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 06:12:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:45,615 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2022-07-14 06:12:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:12:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-14 06:12:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:45,616 INFO L225 Difference]: With dead ends: 155 [2022-07-14 06:12:45,616 INFO L226 Difference]: Without dead ends: 155 [2022-07-14 06:12:45,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:12:45,617 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 590 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:45,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 360 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:12:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-14 06:12:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 102. [2022-07-14 06:12:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 88 states have internal predecessors, (96), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-07-14 06:12:45,620 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 38 [2022-07-14 06:12:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:45,621 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-07-14 06:12:45,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 06:12:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-07-14 06:12:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-14 06:12:45,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:45,622 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-14 06:12:45,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 06:12:45,622 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:45,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:45,622 INFO L85 PathProgramCache]: Analyzing trace with hash -462248216, now seen corresponding path program 1 times [2022-07-14 06:12:45,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:45,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832343624] [2022-07-14 06:12:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:45,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:45,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:45,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:45,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:45,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:45,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832343624] [2022-07-14 06:12:45,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832343624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156791321] [2022-07-14 06:12:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:45,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:45,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:45,667 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:45,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:12:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:12:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:45,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:45,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156791321] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:45,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:45,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-07-14 06:12:45,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194636553] [2022-07-14 06:12:45,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:45,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:12:45,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:12:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:12:45,762 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:45,857 INFO L93 Difference]: Finished difference Result 330 states and 373 transitions. [2022-07-14 06:12:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:12:45,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-07-14 06:12:45,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:45,859 INFO L225 Difference]: With dead ends: 330 [2022-07-14 06:12:45,859 INFO L226 Difference]: Without dead ends: 330 [2022-07-14 06:12:45,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:12:45,860 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 414 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:45,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 488 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:12:45,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-14 06:12:45,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 115. [2022-07-14 06:12:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 80 states have (on average 1.45) internal successors, (116), 101 states have internal predecessors, (116), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:12:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-07-14 06:12:45,865 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 39 [2022-07-14 06:12:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:45,865 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-07-14 06:12:45,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-07-14 06:12:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:12:45,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:45,866 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:45,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:46,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-14 06:12:46,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:46,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:46,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1532500018, now seen corresponding path program 1 times [2022-07-14 06:12:46,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:46,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110941397] [2022-07-14 06:12:46,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:46,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:46,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:46,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110941397] [2022-07-14 06:12:46,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110941397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:46,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:46,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:12:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704039759] [2022-07-14 06:12:46,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:46,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:12:46,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:12:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:12:46,121 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:46,153 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2022-07-14 06:12:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:12:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-07-14 06:12:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:46,154 INFO L225 Difference]: With dead ends: 168 [2022-07-14 06:12:46,155 INFO L226 Difference]: Without dead ends: 168 [2022-07-14 06:12:46,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:12:46,155 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 94 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:46,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 460 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-14 06:12:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 121. [2022-07-14 06:12:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.4285714285714286) internal successors, (120), 106 states have internal predecessors, (120), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:12:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2022-07-14 06:12:46,162 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 41 [2022-07-14 06:12:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:46,162 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2022-07-14 06:12:46,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2022-07-14 06:12:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 06:12:46,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:46,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:46,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-14 06:12:46,164 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1396025844, now seen corresponding path program 1 times [2022-07-14 06:12:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:46,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104934930] [2022-07-14 06:12:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:46,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:46,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104934930] [2022-07-14 06:12:46,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104934930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:46,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530942152] [2022-07-14 06:12:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:46,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:46,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:46,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:46,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:12:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:12:46,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:46,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:46,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530942152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:46,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:46,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-14 06:12:46,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296605212] [2022-07-14 06:12:46,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:46,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:12:46,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:46,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:12:46,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:12:46,308 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:46,337 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-07-14 06:12:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:12:46,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-07-14 06:12:46,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:46,338 INFO L225 Difference]: With dead ends: 168 [2022-07-14 06:12:46,339 INFO L226 Difference]: Without dead ends: 168 [2022-07-14 06:12:46,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:12:46,340 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 114 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:46,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 347 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-14 06:12:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 121. [2022-07-14 06:12:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.4047619047619047) internal successors, (118), 106 states have internal predecessors, (118), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:12:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2022-07-14 06:12:46,345 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 43 [2022-07-14 06:12:46,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:46,346 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2022-07-14 06:12:46,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2022-07-14 06:12:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 06:12:46,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:46,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:46,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:46,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-14 06:12:46,563 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:46,564 INFO L85 PathProgramCache]: Analyzing trace with hash -441136327, now seen corresponding path program 1 times [2022-07-14 06:12:46,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:46,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754665081] [2022-07-14 06:12:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:12:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:46,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:46,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754665081] [2022-07-14 06:12:46,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754665081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:46,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:46,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:12:46,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446014904] [2022-07-14 06:12:46,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:46,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:12:46,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:46,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:12:46,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:12:46,605 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:12:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:46,641 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2022-07-14 06:12:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:12:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-07-14 06:12:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:46,643 INFO L225 Difference]: With dead ends: 117 [2022-07-14 06:12:46,643 INFO L226 Difference]: Without dead ends: 117 [2022-07-14 06:12:46,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:12:46,644 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 101 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:46,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-14 06:12:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-14 06:12:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 102 states have internal predecessors, (114), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:12:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2022-07-14 06:12:46,647 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 43 [2022-07-14 06:12:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:46,648 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2022-07-14 06:12:46,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:12:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2022-07-14 06:12:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 06:12:46,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:46,648 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:46,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 06:12:46,649 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:46,649 INFO L85 PathProgramCache]: Analyzing trace with hash -441136326, now seen corresponding path program 1 times [2022-07-14 06:12:46,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:46,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21112227] [2022-07-14 06:12:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:46,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:12:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:46,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:46,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21112227] [2022-07-14 06:12:46,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21112227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:46,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:46,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:12:46,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731057201] [2022-07-14 06:12:46,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:46,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:12:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:46,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:12:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:12:46,700 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:12:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:46,746 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-07-14 06:12:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:12:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-07-14 06:12:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:46,749 INFO L225 Difference]: With dead ends: 113 [2022-07-14 06:12:46,749 INFO L226 Difference]: Without dead ends: 113 [2022-07-14 06:12:46,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:12:46,749 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 93 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:46,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:46,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-14 06:12:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-07-14 06:12:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 98 states have internal predecessors, (110), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:12:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2022-07-14 06:12:46,755 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 43 [2022-07-14 06:12:46,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:46,755 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2022-07-14 06:12:46,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:12:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2022-07-14 06:12:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:12:46,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:46,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:46,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-14 06:12:46,756 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 791981655, now seen corresponding path program 2 times [2022-07-14 06:12:46,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:46,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008477111] [2022-07-14 06:12:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:46,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:46,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:46,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008477111] [2022-07-14 06:12:46,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008477111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:46,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970018055] [2022-07-14 06:12:46,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:12:46,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:46,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:46,864 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:46,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:12:46,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:12:46,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:12:46,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 06:12:47,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:47,247 INFO L390 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 46 treesize of output 42 [2022-07-14 06:12:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 06:12:47,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970018055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:47,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:47,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2022-07-14 06:12:47,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761537875] [2022-07-14 06:12:47,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:47,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:12:47,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:47,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:12:47,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:12:47,327 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-14 06:12:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:48,393 INFO L93 Difference]: Finished difference Result 345 states and 394 transitions. [2022-07-14 06:12:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:12:48,393 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 44 [2022-07-14 06:12:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:48,395 INFO L225 Difference]: With dead ends: 345 [2022-07-14 06:12:48,395 INFO L226 Difference]: Without dead ends: 345 [2022-07-14 06:12:48,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=521, Invalid=1459, Unknown=0, NotChecked=0, Total=1980 [2022-07-14 06:12:48,396 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1292 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:48,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 940 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:12:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-14 06:12:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 101. [2022-07-14 06:12:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 86 states have internal predecessors, (92), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:12:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-07-14 06:12:48,402 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 44 [2022-07-14 06:12:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:48,402 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-07-14 06:12:48,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-14 06:12:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-07-14 06:12:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:12:48,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:48,403 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-14 06:12:48,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-14 06:12:48,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:48,617 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:48,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:48,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2123889354, now seen corresponding path program 2 times [2022-07-14 06:12:48,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:48,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492733375] [2022-07-14 06:12:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:48,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:48,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:48,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:48,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:48,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 06:12:48,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:48,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492733375] [2022-07-14 06:12:48,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492733375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:48,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561181512] [2022-07-14 06:12:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:12:48,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:48,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:48,960 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:48,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:12:49,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:12:49,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:12:49,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:49,031 INFO L390 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 [2022-07-14 06:12:49,108 INFO L390 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 15 treesize of output 11 [2022-07-14 06:12:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:12:49,157 INFO L390 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 23 treesize of output 23 [2022-07-14 06:12:49,161 INFO L390 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 28 treesize of output 22 [2022-07-14 06:12:49,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:12:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:12:49,437 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:49,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 62 [2022-07-14 06:12:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 06:12:49,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:49,901 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-14 06:12:49,902 INFO L390 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 515 treesize of output 447 [2022-07-14 06:12:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 06:12:51,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561181512] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:51,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:51,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-07-14 06:12:51,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667043242] [2022-07-14 06:12:51,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:51,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-14 06:12:51,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-14 06:12:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 06:12:51,246 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 38 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-14 06:12:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:51,793 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2022-07-14 06:12:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:12:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 46 [2022-07-14 06:12:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:51,795 INFO L225 Difference]: With dead ends: 150 [2022-07-14 06:12:51,795 INFO L226 Difference]: Without dead ends: 150 [2022-07-14 06:12:51,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 06:12:51,796 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 88 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:51,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1128 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 416 Invalid, 0 Unknown, 147 Unchecked, 0.3s Time] [2022-07-14 06:12:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-14 06:12:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 106. [2022-07-14 06:12:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 79 states have (on average 1.240506329113924) internal successors, (98), 91 states have internal predecessors, (98), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:12:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2022-07-14 06:12:51,799 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 46 [2022-07-14 06:12:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:51,799 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2022-07-14 06:12:51,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-14 06:12:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2022-07-14 06:12:51,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:12:51,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:51,800 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:51,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:52,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:52,017 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1818294190, now seen corresponding path program 1 times [2022-07-14 06:12:52,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:52,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799681441] [2022-07-14 06:12:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:52,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:12:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799681441] [2022-07-14 06:12:52,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799681441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:52,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:52,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:12:52,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982356149] [2022-07-14 06:12:52,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:52,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:12:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:12:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:12:52,092 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:12:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:52,330 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2022-07-14 06:12:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:12:52,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2022-07-14 06:12:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:52,332 INFO L225 Difference]: With dead ends: 191 [2022-07-14 06:12:52,332 INFO L226 Difference]: Without dead ends: 191 [2022-07-14 06:12:52,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:12:52,332 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 160 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:52,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 502 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:12:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-14 06:12:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 119. [2022-07-14 06:12:52,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 103 states have internal predecessors, (112), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:12:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2022-07-14 06:12:52,336 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 49 [2022-07-14 06:12:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:52,336 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2022-07-14 06:12:52,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:12:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2022-07-14 06:12:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:12:52,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:52,337 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:52,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-14 06:12:52,337 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash 103710603, now seen corresponding path program 1 times [2022-07-14 06:12:52,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:52,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152541940] [2022-07-14 06:12:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:52,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:12:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:52,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:52,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152541940] [2022-07-14 06:12:52,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152541940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:52,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897004790] [2022-07-14 06:12:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:52,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:52,510 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:52,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:12:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:52,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:12:52,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:52,591 INFO L390 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 10 treesize of output 8 [2022-07-14 06:12:52,683 INFO L390 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 [2022-07-14 06:12:52,706 INFO L390 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 [2022-07-14 06:12:52,747 INFO L390 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 [2022-07-14 06:12:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:52,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:12:52,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897004790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:52,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:12:52,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 23 [2022-07-14 06:12:52,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914922786] [2022-07-14 06:12:52,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:12:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:52,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:12:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:12:52,783 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:12:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:53,034 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2022-07-14 06:12:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:12:53,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-07-14 06:12:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:53,035 INFO L225 Difference]: With dead ends: 162 [2022-07-14 06:12:53,035 INFO L226 Difference]: Without dead ends: 162 [2022-07-14 06:12:53,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:12:53,036 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 236 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:53,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 456 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:12:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-14 06:12:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2022-07-14 06:12:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 111 states have internal predecessors, (120), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-14 06:12:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2022-07-14 06:12:53,039 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 51 [2022-07-14 06:12:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:53,040 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2022-07-14 06:12:53,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:12:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2022-07-14 06:12:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:12:53,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:53,041 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-14 06:12:53,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:53,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-14 06:12:53,252 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:53,252 INFO L85 PathProgramCache]: Analyzing trace with hash 678594683, now seen corresponding path program 3 times [2022-07-14 06:12:53,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:53,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073650769] [2022-07-14 06:12:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:53,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:53,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:53,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073650769] [2022-07-14 06:12:53,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073650769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331214490] [2022-07-14 06:12:53,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:12:53,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:53,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:53,291 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) [2022-07-14 06:12:53,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 06:12:53,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:12:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:12:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:53,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:12:53,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331214490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:53,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:53,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-07-14 06:12:53,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578975607] [2022-07-14 06:12:53,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:53,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:12:53,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:53,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:12:53,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:12:53,434 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:53,559 INFO L93 Difference]: Finished difference Result 216 states and 242 transitions. [2022-07-14 06:12:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:12:53,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-14 06:12:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:53,561 INFO L225 Difference]: With dead ends: 216 [2022-07-14 06:12:53,561 INFO L226 Difference]: Without dead ends: 216 [2022-07-14 06:12:53,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:12:53,562 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 221 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:53,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 551 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:12:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-14 06:12:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 129. [2022-07-14 06:12:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 99 states have (on average 1.202020202020202) internal successors, (119), 111 states have internal predecessors, (119), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-14 06:12:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2022-07-14 06:12:53,567 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 51 [2022-07-14 06:12:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:53,567 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2022-07-14 06:12:53,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:12:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2022-07-14 06:12:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:12:53,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:53,568 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:53,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:53,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-14 06:12:53,783 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1565086581, now seen corresponding path program 1 times [2022-07-14 06:12:53,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:53,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072938463] [2022-07-14 06:12:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:53,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:12:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-14 06:12:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:12:53,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:53,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072938463] [2022-07-14 06:12:53,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072938463] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:53,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:53,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:12:53,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855222877] [2022-07-14 06:12:53,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:53,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:12:53,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:12:53,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:12:53,834 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:12:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:53,876 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2022-07-14 06:12:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:12:53,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-07-14 06:12:53,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:53,877 INFO L225 Difference]: With dead ends: 125 [2022-07-14 06:12:53,877 INFO L226 Difference]: Without dead ends: 125 [2022-07-14 06:12:53,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:12:53,878 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 75 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:53,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 108 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-14 06:12:53,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-14 06:12:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 107 states have internal predecessors, (115), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-14 06:12:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2022-07-14 06:12:53,894 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 54 [2022-07-14 06:12:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:53,894 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2022-07-14 06:12:53,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:12:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2022-07-14 06:12:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:12:53,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:53,895 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:53,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-14 06:12:53,895 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:53,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1565086582, now seen corresponding path program 1 times [2022-07-14 06:12:53,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:53,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587898716] [2022-07-14 06:12:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:53,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:12:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-14 06:12:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:12:53,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:53,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587898716] [2022-07-14 06:12:53,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587898716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:53,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:53,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:12:53,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615959104] [2022-07-14 06:12:53,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:53,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:12:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:12:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:12:53,926 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:12:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:53,947 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2022-07-14 06:12:53,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:12:53,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-07-14 06:12:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:53,948 INFO L225 Difference]: With dead ends: 121 [2022-07-14 06:12:53,948 INFO L226 Difference]: Without dead ends: 121 [2022-07-14 06:12:53,949 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:12:53,949 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 26 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:53,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:12:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-14 06:12:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-14 06:12:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.121212121212121) internal successors, (111), 103 states have internal predecessors, (111), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-14 06:12:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2022-07-14 06:12:53,952 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 54 [2022-07-14 06:12:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:53,952 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2022-07-14 06:12:53,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:12:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2022-07-14 06:12:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-14 06:12:53,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:53,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:53,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-14 06:12:53,953 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:53,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1231729240, now seen corresponding path program 1 times [2022-07-14 06:12:53,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:53,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823937608] [2022-07-14 06:12:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:53,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:54,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:54,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:54,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:54,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:54,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:12:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:54,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-14 06:12:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:12:54,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:54,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823937608] [2022-07-14 06:12:54,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823937608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:12:54,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:12:54,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:12:54,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068761932] [2022-07-14 06:12:54,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:12:54,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:12:54,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:54,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:12:54,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:12:54,014 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:12:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:54,121 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2022-07-14 06:12:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:12:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-07-14 06:12:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:54,123 INFO L225 Difference]: With dead ends: 149 [2022-07-14 06:12:54,123 INFO L226 Difference]: Without dead ends: 149 [2022-07-14 06:12:54,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:12:54,124 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 64 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:54,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 412 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:12:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-14 06:12:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 128. [2022-07-14 06:12:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 109 states have internal predecessors, (117), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 06:12:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 143 transitions. [2022-07-14 06:12:54,126 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 143 transitions. Word has length 60 [2022-07-14 06:12:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:54,126 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 143 transitions. [2022-07-14 06:12:54,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:12:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 143 transitions. [2022-07-14 06:12:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-14 06:12:54,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:54,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:54,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-14 06:12:54,127 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:12:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1979191294, now seen corresponding path program 4 times [2022-07-14 06:12:54,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:54,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044610432] [2022-07-14 06:12:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:54,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:55,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:12:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:55,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:12:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:55,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:12:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:55,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:12:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 06:12:55,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:55,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044610432] [2022-07-14 06:12:55,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044610432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:55,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856407944] [2022-07-14 06:12:55,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:12:55,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:55,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:55,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:55,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 06:12:55,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:12:55,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:55,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-14 06:12:55,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:55,296 INFO L390 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 7 treesize of output 6 [2022-07-14 06:12:55,298 INFO L390 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 [2022-07-14 06:12:57,357 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_19| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_19|))) is different from true [2022-07-14 06:12:59,443 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_20| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_20|))) is different from true [2022-07-14 06:13:01,486 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_21| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_21|))) is different from true [2022-07-14 06:13:01,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-07-14 06:13:01,589 INFO L390 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-14 06:13:01,592 INFO L390 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 28 treesize of output 22 [2022-07-14 06:13:05,861 INFO L390 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 61 [2022-07-14 06:13:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2022-07-14 06:13:05,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:08,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856407944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:08,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:13:08,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 41 [2022-07-14 06:13:08,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349604351] [2022-07-14 06:13:08,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:08,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:13:08,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:13:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2238, Unknown=7, NotChecked=300, Total=2862 [2022-07-14 06:13:08,816 INFO L87 Difference]: Start difference. First operand 128 states and 143 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 06:13:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:09,227 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2022-07-14 06:13:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:13:09,228 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2022-07-14 06:13:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:09,228 INFO L225 Difference]: With dead ends: 143 [2022-07-14 06:13:09,228 INFO L226 Difference]: Without dead ends: 143 [2022-07-14 06:13:09,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=350, Invalid=2517, Unknown=7, NotChecked=318, Total=3192 [2022-07-14 06:13:09,229 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:09,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1042 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 337 Invalid, 0 Unknown, 463 Unchecked, 0.2s Time] [2022-07-14 06:13:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-14 06:13:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-07-14 06:13:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 119 states have (on average 1.1176470588235294) internal successors, (133), 123 states have internal predecessors, (133), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 06:13:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2022-07-14 06:13:09,234 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 59 [2022-07-14 06:13:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:09,234 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2022-07-14 06:13:09,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 06:13:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2022-07-14 06:13:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 06:13:09,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:09,236 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:09,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:09,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-14 06:13:09,441 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:13:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1385465723, now seen corresponding path program 1 times [2022-07-14 06:13:09,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:09,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428343284] [2022-07-14 06:13:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:09,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:13:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:13:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:13:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:13:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:13:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-14 06:13:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:13:09,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:09,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428343284] [2022-07-14 06:13:09,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428343284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:13:09,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:13:09,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:13:09,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022075834] [2022-07-14 06:13:09,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:13:09,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:13:09,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:09,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:13:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:13:09,523 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:13:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:09,742 INFO L93 Difference]: Finished difference Result 173 states and 194 transitions. [2022-07-14 06:13:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:13:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2022-07-14 06:13:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:09,765 INFO L225 Difference]: With dead ends: 173 [2022-07-14 06:13:09,765 INFO L226 Difference]: Without dead ends: 173 [2022-07-14 06:13:09,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:13:09,765 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 118 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:09,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 423 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:13:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-14 06:13:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2022-07-14 06:13:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 128 states have (on average 1.1171875) internal successors, (143), 133 states have internal predecessors, (143), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-14 06:13:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2022-07-14 06:13:09,769 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 62 [2022-07-14 06:13:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:09,769 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2022-07-14 06:13:09,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:13:09,769 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2022-07-14 06:13:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 06:13:09,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:09,770 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-07-14 06:13:09,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-14 06:13:09,770 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:13:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1711953782, now seen corresponding path program 1 times [2022-07-14 06:13:09,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:09,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129251804] [2022-07-14 06:13:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:13:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:13:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:13:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:13:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-14 06:13:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-14 06:13:09,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:09,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129251804] [2022-07-14 06:13:09,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129251804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:09,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77569376] [2022-07-14 06:13:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:09,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:09,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:09,888 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:09,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 06:13:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:09,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 06:13:09,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:09,973 INFO L390 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 10 treesize of output 8 [2022-07-14 06:13:10,108 INFO L390 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 [2022-07-14 06:13:10,125 INFO L390 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 [2022-07-14 06:13:10,169 INFO L390 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 [2022-07-14 06:13:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-14 06:13:10,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:13:10,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77569376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:13:10,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:13:10,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 17 [2022-07-14 06:13:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12397795] [2022-07-14 06:13:10,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:13:10,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:13:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:13:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:13:10,173 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:13:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:10,374 INFO L93 Difference]: Finished difference Result 195 states and 216 transitions. [2022-07-14 06:13:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:13:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-07-14 06:13:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:10,376 INFO L225 Difference]: With dead ends: 195 [2022-07-14 06:13:10,376 INFO L226 Difference]: Without dead ends: 195 [2022-07-14 06:13:10,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:13:10,376 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 97 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:10,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 738 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-07-14 06:13:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-14 06:13:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 158. [2022-07-14 06:13:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 131 states have (on average 1.1068702290076335) internal successors, (145), 135 states have internal predecessors, (145), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 06:13:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 173 transitions. [2022-07-14 06:13:10,380 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 173 transitions. Word has length 62 [2022-07-14 06:13:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:10,380 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 173 transitions. [2022-07-14 06:13:10,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:13:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 173 transitions. [2022-07-14 06:13:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-14 06:13:10,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:10,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:10,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:10,595 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:13:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2066552335, now seen corresponding path program 5 times [2022-07-14 06:13:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:10,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270603014] [2022-07-14 06:13:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:10,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:13:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:10,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:13:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:10,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:13:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:10,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:13:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 06:13:10,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:10,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270603014] [2022-07-14 06:13:10,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270603014] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:10,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142439142] [2022-07-14 06:13:10,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:13:10,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:10,644 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:10,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 06:13:10,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-14 06:13:10,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 06:13:10,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:10,722 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:10,722 INFO L390 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 23 treesize of output 23 [2022-07-14 06:13:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 06:13:10,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 06:13:11,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142439142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:11,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:11,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 25 [2022-07-14 06:13:11,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028161461] [2022-07-14 06:13:11,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 06:13:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 06:13:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:13:11,021 INFO L87 Difference]: Start difference. First operand 158 states and 173 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:13:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:11,651 INFO L93 Difference]: Finished difference Result 331 states and 373 transitions. [2022-07-14 06:13:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:13:11,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2022-07-14 06:13:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:11,652 INFO L225 Difference]: With dead ends: 331 [2022-07-14 06:13:11,652 INFO L226 Difference]: Without dead ends: 331 [2022-07-14 06:13:11,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=481, Invalid=1681, Unknown=0, NotChecked=0, Total=2162 [2022-07-14 06:13:11,653 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 763 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:11,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 1425 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 407 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-07-14 06:13:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-14 06:13:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 171. [2022-07-14 06:13:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 148 states have internal predecessors, (161), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 06:13:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-07-14 06:13:11,657 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 64 [2022-07-14 06:13:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:11,658 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-07-14 06:13:11,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:13:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-07-14 06:13:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-14 06:13:11,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:11,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:11,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:11,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:11,876 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:13:11,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash -244535950, now seen corresponding path program 1 times [2022-07-14 06:13:11,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:11,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30761187] [2022-07-14 06:13:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:11,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:12,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:13:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:12,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:13:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:12,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:13:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:12,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:13:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:12,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:13:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:12,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-14 06:13:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:12,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-14 06:13:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-14 06:13:12,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:12,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30761187] [2022-07-14 06:13:12,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30761187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:12,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960182269] [2022-07-14 06:13:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:12,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:12,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:12,053 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:12,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 06:13:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:12,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:13:12,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:12,155 INFO L390 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 10 treesize of output 8 [2022-07-14 06:13:12,273 INFO L390 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 [2022-07-14 06:13:12,300 INFO L390 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 18 [2022-07-14 06:13:12,643 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:13:12,643 INFO L390 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 29 treesize of output 17 [2022-07-14 06:13:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-14 06:13:12,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:12,866 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:12,867 INFO L390 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 706 treesize of output 654 [2022-07-14 06:13:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-14 06:13:13,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960182269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:13,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:13,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 34 [2022-07-14 06:13:13,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86428811] [2022-07-14 06:13:13,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:13,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-14 06:13:13,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:13,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-14 06:13:13,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:13:13,222 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-14 06:13:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:14,585 INFO L93 Difference]: Finished difference Result 291 states and 324 transitions. [2022-07-14 06:13:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-14 06:13:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 70 [2022-07-14 06:13:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:14,586 INFO L225 Difference]: With dead ends: 291 [2022-07-14 06:13:14,587 INFO L226 Difference]: Without dead ends: 291 [2022-07-14 06:13:14,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=493, Invalid=2929, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:13:14,588 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 470 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:14,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1256 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1169 Invalid, 0 Unknown, 111 Unchecked, 0.5s Time] [2022-07-14 06:13:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-07-14 06:13:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 226. [2022-07-14 06:13:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 188 states have (on average 1.0957446808510638) internal successors, (206), 194 states have internal predecessors, (206), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-14 06:13:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2022-07-14 06:13:14,593 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 70 [2022-07-14 06:13:14,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:14,593 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2022-07-14 06:13:14,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-14 06:13:14,593 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2022-07-14 06:13:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 06:13:14,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:14,594 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:14,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:14,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-14 06:13:14,812 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:13:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:14,812 INFO L85 PathProgramCache]: Analyzing trace with hash 947110112, now seen corresponding path program 1 times [2022-07-14 06:13:14,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:14,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406179477] [2022-07-14 06:13:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:14,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:13:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:14,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:13:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:14,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:13:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:14,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:13:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:14,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-14 06:13:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:14,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-14 06:13:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:13:14,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:14,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406179477] [2022-07-14 06:13:14,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406179477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:14,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957134189] [2022-07-14 06:13:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:14,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:14,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:14,885 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:14,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 06:13:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 06:13:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:15,094 INFO L390 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 [2022-07-14 06:13:15,178 INFO L390 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 [2022-07-14 06:13:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:13:15,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:15,215 INFO L390 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 28 treesize of output 24 [2022-07-14 06:13:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:13:15,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957134189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:15,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:15,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-07-14 06:13:15,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645110859] [2022-07-14 06:13:15,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:15,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:13:15,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:13:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:13:15,340 INFO L87 Difference]: Start difference. First operand 226 states and 250 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-14 06:13:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:15,700 INFO L93 Difference]: Finished difference Result 266 states and 291 transitions. [2022-07-14 06:13:15,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:13:15,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 73 [2022-07-14 06:13:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:15,701 INFO L225 Difference]: With dead ends: 266 [2022-07-14 06:13:15,701 INFO L226 Difference]: Without dead ends: 266 [2022-07-14 06:13:15,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:13:15,704 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 341 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:15,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 867 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 473 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-07-14 06:13:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-14 06:13:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 225. [2022-07-14 06:13:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 187 states have (on average 1.085561497326203) internal successors, (203), 193 states have internal predecessors, (203), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-14 06:13:15,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 245 transitions. [2022-07-14 06:13:15,714 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 245 transitions. Word has length 73 [2022-07-14 06:13:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:15,716 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 245 transitions. [2022-07-14 06:13:15,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-14 06:13:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 245 transitions. [2022-07-14 06:13:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-14 06:13:15,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:15,717 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:15,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:15,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:15,935 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:13:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:15,935 INFO L85 PathProgramCache]: Analyzing trace with hash -285594530, now seen corresponding path program 1 times [2022-07-14 06:13:15,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:15,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376926055] [2022-07-14 06:13:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:15,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:13:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:13:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:13:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:13:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:13:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-14 06:13:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-14 06:13:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-14 06:13:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-14 06:13:16,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:16,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376926055] [2022-07-14 06:13:16,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376926055] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:16,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554766476] [2022-07-14 06:13:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:16,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:16,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:16,213 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:16,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 06:13:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 06:13:16,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:16,304 INFO L390 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 [2022-07-14 06:13:16,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:13:16,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:13:16,369 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:13:16,369 INFO L390 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 17 treesize of output 25 [2022-07-14 06:13:16,961 INFO L390 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 [2022-07-14 06:13:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:13:16,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:17,255 INFO L390 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 41 treesize of output 25 [2022-07-14 06:13:17,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554766476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:17,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:13:17,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2022-07-14 06:13:17,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625604890] [2022-07-14 06:13:17,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 06:13:17,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:17,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 06:13:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:13:17,738 INFO L87 Difference]: Start difference. First operand 225 states and 245 transitions. Second operand has 31 states, 28 states have (on average 2.892857142857143) internal successors, (81), 30 states have internal predecessors, (81), 8 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-14 06:13:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:18,632 INFO L93 Difference]: Finished difference Result 259 states and 280 transitions. [2022-07-14 06:13:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:13:18,632 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.892857142857143) internal successors, (81), 30 states have internal predecessors, (81), 8 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 74 [2022-07-14 06:13:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:18,633 INFO L225 Difference]: With dead ends: 259 [2022-07-14 06:13:18,633 INFO L226 Difference]: Without dead ends: 259 [2022-07-14 06:13:18,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=550, Invalid=2872, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:13:18,634 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 315 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:18,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 527 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 609 Invalid, 0 Unknown, 171 Unchecked, 0.3s Time] [2022-07-14 06:13:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-07-14 06:13:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 232. [2022-07-14 06:13:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 193 states have (on average 1.0880829015544042) internal successors, (210), 198 states have internal predecessors, (210), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-14 06:13:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 252 transitions. [2022-07-14 06:13:18,638 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 252 transitions. Word has length 74 [2022-07-14 06:13:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:18,639 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 252 transitions. [2022-07-14 06:13:18,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.892857142857143) internal successors, (81), 30 states have internal predecessors, (81), 8 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-14 06:13:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 252 transitions. [2022-07-14 06:13:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-14 06:13:18,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:18,640 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:18,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:18,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:18,855 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:13:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash 421565281, now seen corresponding path program 1 times [2022-07-14 06:13:18,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470853911] [2022-07-14 06:13:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:13:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:13:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:13:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:13:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:13:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-14 06:13:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-14 06:13:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-14 06:13:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-14 06:13:19,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:19,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470853911] [2022-07-14 06:13:19,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470853911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:13:19,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:13:19,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:13:19,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730789360] [2022-07-14 06:13:19,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:13:19,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:13:19,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:13:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:13:19,025 INFO L87 Difference]: Start difference. First operand 232 states and 252 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 06:13:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:19,303 INFO L93 Difference]: Finished difference Result 254 states and 277 transitions. [2022-07-14 06:13:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:13:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2022-07-14 06:13:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:19,305 INFO L225 Difference]: With dead ends: 254 [2022-07-14 06:13:19,305 INFO L226 Difference]: Without dead ends: 254 [2022-07-14 06:13:19,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:13:19,305 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 252 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:19,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 217 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:13:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-14 06:13:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2022-07-14 06:13:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 207 states have (on average 1.0821256038647342) internal successors, (224), 211 states have internal predecessors, (224), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-14 06:13:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 270 transitions. [2022-07-14 06:13:19,310 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 270 transitions. Word has length 76 [2022-07-14 06:13:19,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:19,310 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 270 transitions. [2022-07-14 06:13:19,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 06:13:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 270 transitions. [2022-07-14 06:13:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-14 06:13:19,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:19,311 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:19,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-14 06:13:19,311 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:13:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1507430298, now seen corresponding path program 1 times [2022-07-14 06:13:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:19,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339930449] [2022-07-14 06:13:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:19,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:13:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:13:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:13:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:13:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-14 06:13:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-14 06:13:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-14 06:13:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-14 06:13:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-14 06:13:19,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:19,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339930449] [2022-07-14 06:13:19,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339930449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:19,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9367454] [2022-07-14 06:13:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:19,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:19,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:19,840 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:19,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 06:13:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:19,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-14 06:13:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:19,935 INFO L390 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 [2022-07-14 06:13:19,944 INFO L390 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 7 treesize of output 6 [2022-07-14 06:13:20,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-07-14 06:13:20,330 INFO L390 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-14 06:13:24,435 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-14 06:13:24,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 06:13:35,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-07-14 06:13:35,095 INFO L390 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 8 treesize of output 7 [2022-07-14 06:13:37,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 42 [2022-07-14 06:13:37,210 INFO L390 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 8 treesize of output 7 [2022-07-14 06:16:08,641 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:16:08,641 INFO L390 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 1 case distinctions, treesize of input 57 treesize of output 47 [2022-07-14 06:16:08,647 INFO L390 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 26 treesize of output 22 [2022-07-14 06:16:08,652 INFO L390 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 26 treesize of output 22 [2022-07-14 06:16:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-14 06:16:08,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:20,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9367454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:20,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:16:20,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 46 [2022-07-14 06:16:20,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106890234] [2022-07-14 06:16:20,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:16:20,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:16:20,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:20,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:16:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3280, Unknown=21, NotChecked=0, Total=3540 [2022-07-14 06:16:20,021 INFO L87 Difference]: Start difference. First operand 248 states and 270 transitions. Second operand has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 45 states have internal predecessors, (93), 7 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-14 06:16:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:43,681 INFO L93 Difference]: Finished difference Result 264 states and 287 transitions. [2022-07-14 06:16:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:16:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 45 states have internal predecessors, (93), 7 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 80 [2022-07-14 06:16:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:43,683 INFO L225 Difference]: With dead ends: 264 [2022-07-14 06:16:43,683 INFO L226 Difference]: Without dead ends: 264 [2022-07-14 06:16:43,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 107 SyntacticMatches, 14 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 201.9s TimeCoverageRelationStatistics Valid=365, Invalid=4578, Unknown=27, NotChecked=0, Total=4970 [2022-07-14 06:16:43,684 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:43,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 993 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 418 Invalid, 0 Unknown, 267 Unchecked, 0.2s Time] [2022-07-14 06:16:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-14 06:16:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-07-14 06:16:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.0772727272727274) internal successors, (237), 223 states have internal predecessors, (237), 25 states have call successors, (25), 18 states have call predecessors, (25), 16 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 06:16:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 287 transitions. [2022-07-14 06:16:43,689 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 287 transitions. Word has length 80 [2022-07-14 06:16:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:43,689 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 287 transitions. [2022-07-14 06:16:43,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 45 states have internal predecessors, (93), 7 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-14 06:16:43,689 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 287 transitions. [2022-07-14 06:16:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-14 06:16:43,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:43,690 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:43,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:43,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-14 06:16:43,906 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-14 06:16:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:43,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1779636283, now seen corresponding path program 6 times [2022-07-14 06:16:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035816619] [2022-07-14 06:16:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:43,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:16:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 06:16:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 06:16:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-14 06:16:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 31 proven. 87 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 06:16:47,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:47,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035816619] [2022-07-14 06:16:47,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035816619] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:47,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460423337] [2022-07-14 06:16:47,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:16:47,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:16:47,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:16:47,693 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:16:47,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 06:16:47,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-14 06:16:47,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:16:47,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-14 06:16:47,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:47,858 INFO L390 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 7 treesize of output 6 [2022-07-14 06:16:47,862 INFO L390 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 [2022-07-14 06:16:49,988 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_25| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_25|))) is different from true [2022-07-14 06:16:52,055 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_26| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_26|))) is different from true [2022-07-14 06:16:58,249 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_27| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_27|))) is different from true [2022-07-14 06:16:58,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-07-14 06:16:58,417 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-07-14 06:16:58,508 INFO L390 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 0 case distinctions, treesize of input 29 treesize of output 24