./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/elimination_max.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 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:49:34,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:49:34,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:49:34,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:49:34,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:49:34,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:49:34,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:49:34,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:49:34,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:49:34,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:49:34,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:49:34,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:49:34,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:49:34,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:49:34,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:49:34,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:49:34,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:49:34,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:49:34,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:49:34,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:49:34,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:49:34,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:49:34,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:49:34,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:49:34,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:49:34,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:49:34,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:49:34,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:49:34,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:49:34,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:49:34,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:49:34,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:49:34,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:49:34,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:49:34,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:49:34,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:49:34,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:49:34,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:49:34,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:49:34,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:49:34,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:49:34,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:49:34,607 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:49:34,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:49:34,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:49:34,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:49:34,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:49:34,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:49:34,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:49:34,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:49:34,610 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:49:34,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:49:34,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:49:34,611 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:49:34,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:49:34,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:49:34,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:49:34,611 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:49:34,612 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:49:34,612 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:49:34,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:49:34,612 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:49:34,612 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:49:34,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:49:34,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:49:34,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:49:34,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:49:34,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:49:34,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:49:34,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:49:34,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:49:34,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:49:34,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:49:34,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e [2021-12-16 05:49:34,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:49:34,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:49:34,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:49:34,823 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:49:34,823 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:49:34,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max.c [2021-12-16 05:49:34,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8336e7b/76470fb11bf444b6bdf10d172cab1b28/FLAG28b9cdc5f [2021-12-16 05:49:35,230 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:49:35,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max.c [2021-12-16 05:49:35,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8336e7b/76470fb11bf444b6bdf10d172cab1b28/FLAG28b9cdc5f [2021-12-16 05:49:35,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8336e7b/76470fb11bf444b6bdf10d172cab1b28 [2021-12-16 05:49:35,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:49:35,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:49:35,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:49:35,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:49:35,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:49:35,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d87ac96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35, skipping insertion in model container [2021-12-16 05:49:35,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:49:35,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:49:35,786 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/elimination_max.c[485,498] [2021-12-16 05:49:35,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:49:35,812 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:49:35,822 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/elimination_max.c[485,498] [2021-12-16 05:49:35,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:49:35,845 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:49:35,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35 WrapperNode [2021-12-16 05:49:35,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:49:35,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:49:35,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:49:35,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:49:35,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,909 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2021-12-16 05:49:35,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:49:35,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:49:35,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:49:35,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:49:35,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:49:35,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:49:35,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:49:35,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:49:35,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (1/1) ... [2021-12-16 05:49:35,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:49:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:35,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 05:49:35,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 05:49:36,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:49:36,008 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 05:49:36,008 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 05:49:36,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 05:49:36,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:49:36,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:49:36,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:49:36,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:49:36,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 05:49:36,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 05:49:36,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:49:36,091 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:49:36,093 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:49:36,261 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:49:36,266 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:49:36,274 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 05:49:36,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:49:36 BoogieIcfgContainer [2021-12-16 05:49:36,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:49:36,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:49:36,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:49:36,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:49:36,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:49:35" (1/3) ... [2021-12-16 05:49:36,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7c667d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:49:36, skipping insertion in model container [2021-12-16 05:49:36,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:35" (2/3) ... [2021-12-16 05:49:36,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7c667d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:49:36, skipping insertion in model container [2021-12-16 05:49:36,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:49:36" (3/3) ... [2021-12-16 05:49:36,289 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2021-12-16 05:49:36,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:49:36,297 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-12-16 05:49:36,360 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:49:36,372 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 05:49:36,373 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-12-16 05:49:36,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 46 states have internal predecessors, (53), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:49:36,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:49:36,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:36,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:36,396 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1391371914, now seen corresponding path program 1 times [2021-12-16 05:49:36,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:36,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571850194] [2021-12-16 05:49:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:36,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:36,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:36,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:36,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571850194] [2021-12-16 05:49:36,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571850194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:36,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:36,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:49:36,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833145973] [2021-12-16 05:49:36,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:36,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 05:49:36,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:36,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 05:49:36,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 05:49:36,624 INFO L87 Difference]: Start difference. First operand has 53 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 46 states have internal predecessors, (53), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:36,646 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-12-16 05:49:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 05:49:36,649 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-16 05:49:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:36,655 INFO L225 Difference]: With dead ends: 53 [2021-12-16 05:49:36,655 INFO L226 Difference]: Without dead ends: 51 [2021-12-16 05:49:36,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 05:49:36,664 INFO L933 BasicCegarLoop]: 57 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, 57 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 [2021-12-16 05:49:36,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-16 05:49:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-16 05:49:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 44 states have internal predecessors, (47), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:49:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-12-16 05:49:36,707 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 11 [2021-12-16 05:49:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:36,708 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-12-16 05:49:36,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-12-16 05:49:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:49:36,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:36,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:36,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:49:36,712 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1128588020, now seen corresponding path program 1 times [2021-12-16 05:49:36,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:36,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473716139] [2021-12-16 05:49:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:36,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:36,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:36,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:36,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473716139] [2021-12-16 05:49:36,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473716139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:36,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:36,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:49:36,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228904369] [2021-12-16 05:49:36,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:36,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:49:36,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:36,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:49:36,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:49:36,790 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:36,862 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-12-16 05:49:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:49:36,864 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-16 05:49:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:36,865 INFO L225 Difference]: With dead ends: 44 [2021-12-16 05:49:36,866 INFO L226 Difference]: Without dead ends: 44 [2021-12-16 05:49:36,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:49:36,868 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 52 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:36,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:49:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-16 05:49:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-16 05:49:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 37 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:49:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-12-16 05:49:36,884 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 11 [2021-12-16 05:49:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:36,887 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-12-16 05:49:36,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-12-16 05:49:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:49:36,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:36,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:36,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:49:36,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:36,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:36,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1128588019, now seen corresponding path program 1 times [2021-12-16 05:49:36,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:36,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230774708] [2021-12-16 05:49:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:36,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:37,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:37,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230774708] [2021-12-16 05:49:37,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230774708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:37,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:37,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:49:37,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124050383] [2021-12-16 05:49:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:37,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:49:37,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:49:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:49:37,069 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:37,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:37,282 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2021-12-16 05:49:37,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:49:37,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-16 05:49:37,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:37,286 INFO L225 Difference]: With dead ends: 92 [2021-12-16 05:49:37,286 INFO L226 Difference]: Without dead ends: 92 [2021-12-16 05:49:37,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:49:37,289 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 102 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:37,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 78 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:49:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-16 05:49:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-12-16 05:49:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 61 states have internal predecessors, (76), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 05:49:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2021-12-16 05:49:37,298 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 11 [2021-12-16 05:49:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:37,298 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2021-12-16 05:49:37,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2021-12-16 05:49:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:49:37,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:37,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:37,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 05:49:37,299 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:37,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:37,300 INFO L85 PathProgramCache]: Analyzing trace with hash -626490262, now seen corresponding path program 1 times [2021-12-16 05:49:37,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:37,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539903258] [2021-12-16 05:49:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:37,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:37,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:37,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:37,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539903258] [2021-12-16 05:49:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539903258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:37,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:37,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:49:37,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447224357] [2021-12-16 05:49:37,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:37,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:49:37,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:49:37,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:49:37,436 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:37,649 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2021-12-16 05:49:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:49:37,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-16 05:49:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:37,653 INFO L225 Difference]: With dead ends: 110 [2021-12-16 05:49:37,653 INFO L226 Difference]: Without dead ends: 110 [2021-12-16 05:49:37,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:49:37,660 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 107 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:37,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 93 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:49:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-16 05:49:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 78. [2021-12-16 05:49:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 65 states have internal predecessors, (82), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 05:49:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-12-16 05:49:37,676 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 12 [2021-12-16 05:49:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:37,676 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-12-16 05:49:37,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-12-16 05:49:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 05:49:37,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:37,677 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:37,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 05:49:37,677 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2138530157, now seen corresponding path program 1 times [2021-12-16 05:49:37,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:37,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307256828] [2021-12-16 05:49:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:37,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:37,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:37,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307256828] [2021-12-16 05:49:37,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307256828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789165316] [2021-12-16 05:49:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:37,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:37,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:37,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:49:37,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:49:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:37,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:49:37,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:38,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:49:38,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789165316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:38,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:49:38,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-12-16 05:49:38,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621964679] [2021-12-16 05:49:38,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:38,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:49:38,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:38,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:49:38,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:49:38,070 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:38,343 INFO L93 Difference]: Finished difference Result 131 states and 158 transitions. [2021-12-16 05:49:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:49:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-16 05:49:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:38,346 INFO L225 Difference]: With dead ends: 131 [2021-12-16 05:49:38,346 INFO L226 Difference]: Without dead ends: 131 [2021-12-16 05:49:38,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:49:38,348 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 164 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:38,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 121 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:49:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-16 05:49:38,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2021-12-16 05:49:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 74 states have internal predecessors, (94), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-16 05:49:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 120 transitions. [2021-12-16 05:49:38,371 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 120 transitions. Word has length 15 [2021-12-16 05:49:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:38,371 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 120 transitions. [2021-12-16 05:49:38,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 120 transitions. [2021-12-16 05:49:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:49:38,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:38,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:38,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:38,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:38,595 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1240052176, now seen corresponding path program 1 times [2021-12-16 05:49:38,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:38,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009249158] [2021-12-16 05:49:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:38,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:38,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:38,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 05:49:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:49:38,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009249158] [2021-12-16 05:49:38,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009249158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:38,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:38,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:49:38,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423513772] [2021-12-16 05:49:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:38,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:49:38,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:49:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:49:38,699 INFO L87 Difference]: Start difference. First operand 90 states and 120 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:49:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:38,817 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2021-12-16 05:49:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:49:38,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-12-16 05:49:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:38,820 INFO L225 Difference]: With dead ends: 103 [2021-12-16 05:49:38,820 INFO L226 Difference]: Without dead ends: 103 [2021-12-16 05:49:38,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:49:38,821 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:38,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 93 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:49:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-16 05:49:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 67. [2021-12-16 05:49:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 57 states have internal predecessors, (70), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-16 05:49:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-12-16 05:49:38,827 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 17 [2021-12-16 05:49:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:38,827 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-12-16 05:49:38,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:49:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-12-16 05:49:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:49:38,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:38,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:38,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 05:49:38,829 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:38,829 INFO L85 PathProgramCache]: Analyzing trace with hash -213088232, now seen corresponding path program 1 times [2021-12-16 05:49:38,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:38,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959246665] [2021-12-16 05:49:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:38,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:38,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:38,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 05:49:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:38,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:38,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959246665] [2021-12-16 05:49:38,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959246665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:38,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:38,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:49:38,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183436356] [2021-12-16 05:49:38,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:38,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:49:38,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:49:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:49:38,885 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:49:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:38,939 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2021-12-16 05:49:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:49:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-16 05:49:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:38,940 INFO L225 Difference]: With dead ends: 103 [2021-12-16 05:49:38,940 INFO L226 Difference]: Without dead ends: 103 [2021-12-16 05:49:38,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:49:38,941 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 72 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:38,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 97 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-16 05:49:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2021-12-16 05:49:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 1.36) internal successors, (68), 56 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-16 05:49:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-12-16 05:49:38,946 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 18 [2021-12-16 05:49:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:38,946 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-12-16 05:49:38,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:49:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-12-16 05:49:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 05:49:38,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:38,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:38,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 05:49:38,947 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:38,948 INFO L85 PathProgramCache]: Analyzing trace with hash -349536599, now seen corresponding path program 1 times [2021-12-16 05:49:38,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:38,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802537362] [2021-12-16 05:49:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:38,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:39,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:39,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 05:49:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:39,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:39,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802537362] [2021-12-16 05:49:39,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802537362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:39,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:39,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 05:49:39,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256665158] [2021-12-16 05:49:39,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:39,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 05:49:39,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 05:49:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:49:39,040 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:49:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:39,169 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2021-12-16 05:49:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:49:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-16 05:49:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:39,170 INFO L225 Difference]: With dead ends: 70 [2021-12-16 05:49:39,170 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 05:49:39,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:49:39,171 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:39,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 146 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:49:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 05:49:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-16 05:49:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 59 states have internal predecessors, (71), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-16 05:49:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2021-12-16 05:49:39,176 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 22 [2021-12-16 05:49:39,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:39,177 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2021-12-16 05:49:39,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:49:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2021-12-16 05:49:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 05:49:39,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:39,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:39,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 05:49:39,178 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:39,179 INFO L85 PathProgramCache]: Analyzing trace with hash 716218012, now seen corresponding path program 1 times [2021-12-16 05:49:39,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:39,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058596635] [2021-12-16 05:49:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:39,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:39,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:39,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058596635] [2021-12-16 05:49:39,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058596635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741065896] [2021-12-16 05:49:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:39,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:39,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:49:39,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:49:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:39,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:49:39,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:39,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:39,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-12-16 05:49:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:39,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741065896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:39,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:39,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-12-16 05:49:39,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316884693] [2021-12-16 05:49:39,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:39,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 05:49:39,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:39,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 05:49:39,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:49:39,892 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:40,280 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-12-16 05:49:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:49:40,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-16 05:49:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:40,282 INFO L225 Difference]: With dead ends: 71 [2021-12-16 05:49:40,282 INFO L226 Difference]: Without dead ends: 71 [2021-12-16 05:49:40,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2021-12-16 05:49:40,283 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 305 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:40,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 229 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:49:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-16 05:49:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2021-12-16 05:49:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 50 states have internal predecessors, (57), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-16 05:49:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-16 05:49:40,286 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 20 [2021-12-16 05:49:40,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:40,286 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-16 05:49:40,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:49:40,287 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-16 05:49:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 05:49:40,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:40,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:40,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:40,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 05:49:40,500 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1772526638, now seen corresponding path program 1 times [2021-12-16 05:49:40,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:40,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400545759] [2021-12-16 05:49:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:40,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:40,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:40,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 05:49:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:40,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:40,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400545759] [2021-12-16 05:49:40,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400545759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:40,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66574645] [2021-12-16 05:49:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:40,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:40,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:40,593 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) [2021-12-16 05:49:40,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:49:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:40,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:49:40,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:40,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:49:40,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66574645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:40,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:49:40,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2021-12-16 05:49:40,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279221593] [2021-12-16 05:49:40,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:40,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:49:40,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:49:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:49:40,901 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:49:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:41,068 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-12-16 05:49:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:49:41,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-16 05:49:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:41,069 INFO L225 Difference]: With dead ends: 73 [2021-12-16 05:49:41,069 INFO L226 Difference]: Without dead ends: 73 [2021-12-16 05:49:41,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:49:41,070 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:41,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 208 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 126 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-12-16 05:49:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-16 05:49:41,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2021-12-16 05:49:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 05:49:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-12-16 05:49:41,073 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 22 [2021-12-16 05:49:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:41,074 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-12-16 05:49:41,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:49:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-12-16 05:49:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:49:41,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:41,074 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:41,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 05:49:41,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:41,298 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:41,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2088368292, now seen corresponding path program 1 times [2021-12-16 05:49:41,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:41,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069635926] [2021-12-16 05:49:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:41,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 05:49:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 05:49:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:41,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:41,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069635926] [2021-12-16 05:49:41,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069635926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:41,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:41,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:49:41,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433314780] [2021-12-16 05:49:41,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:41,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:49:41,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:49:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:49:41,359 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:49:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:41,432 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-12-16 05:49:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:49:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-12-16 05:49:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:41,433 INFO L225 Difference]: With dead ends: 57 [2021-12-16 05:49:41,433 INFO L226 Difference]: Without dead ends: 57 [2021-12-16 05:49:41,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:49:41,434 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 73 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:41,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:41,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-16 05:49:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-12-16 05:49:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 42 states have internal predecessors, (44), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 05:49:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-12-16 05:49:41,437 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 27 [2021-12-16 05:49:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:41,437 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-12-16 05:49:41,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 05:49:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-12-16 05:49:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 05:49:41,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:41,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:41,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 05:49:41,439 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash 161961841, now seen corresponding path program 1 times [2021-12-16 05:49:41,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:41,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727917115] [2021-12-16 05:49:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:41,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 05:49:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 05:49:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:41,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727917115] [2021-12-16 05:49:41,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727917115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:41,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:41,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 05:49:41,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554435492] [2021-12-16 05:49:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:41,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 05:49:41,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 05:49:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:49:41,540 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 05:49:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:41,629 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-12-16 05:49:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:49:41,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-16 05:49:41,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:41,631 INFO L225 Difference]: With dead ends: 49 [2021-12-16 05:49:41,632 INFO L226 Difference]: Without dead ends: 49 [2021-12-16 05:49:41,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:49:41,633 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:41,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 144 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:49:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-16 05:49:41,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-16 05:49:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 40 states have internal predecessors, (42), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 05:49:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-12-16 05:49:41,635 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 31 [2021-12-16 05:49:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:41,636 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-12-16 05:49:41,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 05:49:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-12-16 05:49:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 05:49:41,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:41,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:41,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 05:49:41,640 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash -21165132, now seen corresponding path program 1 times [2021-12-16 05:49:41,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:41,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091316569] [2021-12-16 05:49:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:41,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 05:49:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 05:49:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 05:49:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 05:49:41,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091316569] [2021-12-16 05:49:41,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091316569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208837570] [2021-12-16 05:49:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:41,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:41,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:41,741 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) [2021-12-16 05:49:41,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:49:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:41,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:49:41,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 05:49:41,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:49:41,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208837570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:41,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:49:41,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-16 05:49:41,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24552431] [2021-12-16 05:49:41,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:41,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:49:41,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:49:41,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:49:41,919 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 05:49:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:42,011 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-12-16 05:49:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:49:42,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2021-12-16 05:49:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:42,013 INFO L225 Difference]: With dead ends: 69 [2021-12-16 05:49:42,013 INFO L226 Difference]: Without dead ends: 69 [2021-12-16 05:49:42,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-16 05:49:42,014 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:42,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:49:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-16 05:49:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-12-16 05:49:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-16 05:49:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-12-16 05:49:42,017 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 36 [2021-12-16 05:49:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:42,017 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-12-16 05:49:42,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 05:49:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-12-16 05:49:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 05:49:42,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:42,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:42,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:42,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:42,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash -656120578, now seen corresponding path program 1 times [2021-12-16 05:49:42,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:42,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497587808] [2021-12-16 05:49:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:42,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 05:49:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 05:49:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 05:49:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:49:42,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:42,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497587808] [2021-12-16 05:49:42,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497587808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:42,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:42,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:49:42,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632563534] [2021-12-16 05:49:42,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:42,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:49:42,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:42,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:49:42,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:49:42,279 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (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) [2021-12-16 05:49:42,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:42,306 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-12-16 05:49:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:49:42,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (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 37 [2021-12-16 05:49:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:42,308 INFO L225 Difference]: With dead ends: 59 [2021-12-16 05:49:42,308 INFO L226 Difference]: Without dead ends: 59 [2021-12-16 05:49:42,308 INFO L932 BasicCegarLoop]: 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 [2021-12-16 05:49:42,309 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:42,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-16 05:49:42,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-16 05:49:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-16 05:49:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-12-16 05:49:42,313 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 37 [2021-12-16 05:49:42,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:42,313 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-12-16 05:49:42,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (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) [2021-12-16 05:49:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-12-16 05:49:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 05:49:42,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:42,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:42,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 05:49:42,315 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:42,315 INFO L85 PathProgramCache]: Analyzing trace with hash 828320161, now seen corresponding path program 1 times [2021-12-16 05:49:42,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:42,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312771357] [2021-12-16 05:49:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:42,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 05:49:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 05:49:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 05:49:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:49:42,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:42,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312771357] [2021-12-16 05:49:42,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312771357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:42,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:42,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:49:42,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910310809] [2021-12-16 05:49:42,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:42,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:49:42,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:49:42,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:49:42,419 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-12-16 05:49:42,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:42,476 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-12-16 05:49:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:49:42,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 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 39 [2021-12-16 05:49:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:42,477 INFO L225 Difference]: With dead ends: 58 [2021-12-16 05:49:42,477 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 05:49:42,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:49:42,478 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:42,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 54 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 05:49:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-16 05:49:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:49:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-16 05:49:42,481 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2021-12-16 05:49:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:42,481 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-16 05:49:42,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-12-16 05:49:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-16 05:49:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 05:49:42,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:42,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:42,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 05:49:42,482 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1506530066, now seen corresponding path program 1 times [2021-12-16 05:49:42,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:42,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617258364] [2021-12-16 05:49:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:42,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 05:49:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 05:49:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 05:49:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 05:49:42,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617258364] [2021-12-16 05:49:42,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617258364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845183195] [2021-12-16 05:49:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:42,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:42,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:42,586 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) [2021-12-16 05:49:42,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:49:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:42,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 05:49:42,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:43,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:43,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-16 05:49:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 05:49:43,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845183195] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:43,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:43,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2021-12-16 05:49:43,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529833188] [2021-12-16 05:49:43,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:43,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 05:49:43,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:43,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 05:49:43,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:49:43,283 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-16 05:49:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:43,695 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-12-16 05:49:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:49:43,696 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 40 [2021-12-16 05:49:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:43,696 INFO L225 Difference]: With dead ends: 87 [2021-12-16 05:49:43,697 INFO L226 Difference]: Without dead ends: 87 [2021-12-16 05:49:43,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 05:49:43,698 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 160 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:43,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 223 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 320 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2021-12-16 05:49:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-16 05:49:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 51. [2021-12-16 05:49:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 05:49:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-12-16 05:49:43,701 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 40 [2021-12-16 05:49:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:43,701 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-12-16 05:49:43,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-16 05:49:43,702 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-12-16 05:49:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 05:49:43,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:43,702 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:43,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:43,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 05:49:43,916 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1296254220, now seen corresponding path program 2 times [2021-12-16 05:49:43,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:43,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585453730] [2021-12-16 05:49:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:43,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:43,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:43,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 05:49:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:43,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 05:49:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 05:49:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:43,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 05:49:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 05:49:43,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:43,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585453730] [2021-12-16 05:49:43,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585453730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:43,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505184765] [2021-12-16 05:49:43,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:49:43,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:43,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:43,994 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) [2021-12-16 05:49:43,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:49:44,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:49:44,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:44,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:49:44,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 05:49:44,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 05:49:44,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505184765] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:44,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:44,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-12-16 05:49:44,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005051399] [2021-12-16 05:49:44,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:44,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 05:49:44,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 05:49:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:49:44,327 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-16 05:49:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:44,453 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2021-12-16 05:49:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:49:44,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 50 [2021-12-16 05:49:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:44,454 INFO L225 Difference]: With dead ends: 77 [2021-12-16 05:49:44,455 INFO L226 Difference]: Without dead ends: 58 [2021-12-16 05:49:44,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-12-16 05:49:44,455 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 52 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:44,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 201 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:49:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-16 05:49:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-12-16 05:49:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 05:49:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-12-16 05:49:44,458 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2021-12-16 05:49:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:44,458 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-12-16 05:49:44,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-16 05:49:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-12-16 05:49:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 05:49:44,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:44,459 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:44,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:44,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 05:49:44,664 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-16 05:49:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1125992250, now seen corresponding path program 3 times [2021-12-16 05:49:44,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:44,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540196581] [2021-12-16 05:49:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:44,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:44,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 05:49:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:44,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 05:49:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 05:49:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:44,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 05:49:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:44,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 05:49:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 05:49:44,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:44,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540196581] [2021-12-16 05:49:44,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540196581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:44,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613679842] [2021-12-16 05:49:44,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:49:44,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:44,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:44,805 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) [2021-12-16 05:49:44,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:49:44,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 05:49:44,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:44,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:49:44,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 05:49:45,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:45,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-16 05:49:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 05:49:45,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613679842] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:45,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:45,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2021-12-16 05:49:45,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060242035] [2021-12-16 05:49:45,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:45,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 05:49:45,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 05:49:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-16 05:49:45,410 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 20 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 20 states have internal predecessors, (70), 9 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:49:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:45,842 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-12-16 05:49:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:49:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 20 states have internal predecessors, (70), 9 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 54 [2021-12-16 05:49:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:45,848 INFO L225 Difference]: With dead ends: 64 [2021-12-16 05:49:45,848 INFO L226 Difference]: Without dead ends: 0 [2021-12-16 05:49:45,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-12-16 05:49:45,849 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 166 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:45,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 145 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:49:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-16 05:49:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-16 05:49:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-16 05:49:45,851 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-12-16 05:49:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:45,851 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 05:49:45,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 20 states have internal predecessors, (70), 9 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 05:49:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-16 05:49:45,851 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-16 05:49:45,854 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (16 of 17 remaining) [2021-12-16 05:49:45,854 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (15 of 17 remaining) [2021-12-16 05:49:45,854 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (14 of 17 remaining) [2021-12-16 05:49:45,855 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (13 of 17 remaining) [2021-12-16 05:49:45,855 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (12 of 17 remaining) [2021-12-16 05:49:45,855 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (11 of 17 remaining) [2021-12-16 05:49:45,855 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (10 of 17 remaining) [2021-12-16 05:49:45,855 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (9 of 17 remaining) [2021-12-16 05:49:45,855 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (8 of 17 remaining) [2021-12-16 05:49:45,856 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (7 of 17 remaining) [2021-12-16 05:49:45,856 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (6 of 17 remaining) [2021-12-16 05:49:45,856 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (5 of 17 remaining) [2021-12-16 05:49:45,856 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (4 of 17 remaining) [2021-12-16 05:49:45,856 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (3 of 17 remaining) [2021-12-16 05:49:45,856 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (2 of 17 remaining) [2021-12-16 05:49:45,857 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (1 of 17 remaining) [2021-12-16 05:49:45,857 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2021-12-16 05:49:45,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:46,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:46,083 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:46,085 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 05:49:46,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:49:46 BoogieIcfgContainer [2021-12-16 05:49:46,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 05:49:46,088 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 05:49:46,088 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 05:49:46,088 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 05:49:46,089 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:49:36" (3/4) ... [2021-12-16 05:49:46,091 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-16 05:49:46,096 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-16 05:49:46,096 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-16 05:49:46,101 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-16 05:49:46,101 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-16 05:49:46,102 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-12-16 05:49:46,102 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-16 05:49:46,136 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-16 05:49:46,137 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 05:49:46,137 INFO L158 Benchmark]: Toolchain (without parser) took 10475.18ms. Allocated memory was 90.2MB in the beginning and 132.1MB in the end (delta: 41.9MB). Free memory was 53.4MB in the beginning and 78.7MB in the end (delta: -25.3MB). Peak memory consumption was 20.1MB. Max. memory is 16.1GB. [2021-12-16 05:49:46,137 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory was 70.2MB in the beginning and 70.1MB in the end (delta: 45.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:49:46,138 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.83ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 53.2MB in the beginning and 88.5MB in the end (delta: -35.4MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2021-12-16 05:49:46,138 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.70ms. Allocated memory is still 109.1MB. Free memory was 88.5MB in the beginning and 86.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 05:49:46,138 INFO L158 Benchmark]: Boogie Preprocessor took 20.28ms. Allocated memory is still 109.1MB. Free memory was 86.7MB in the beginning and 85.8MB in the end (delta: 889.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:49:46,139 INFO L158 Benchmark]: RCFGBuilder took 345.54ms. Allocated memory is still 109.1MB. Free memory was 85.4MB in the beginning and 73.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-16 05:49:46,139 INFO L158 Benchmark]: TraceAbstraction took 9809.38ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 72.8MB in the beginning and 82.7MB in the end (delta: -9.9MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2021-12-16 05:49:46,139 INFO L158 Benchmark]: Witness Printer took 48.87ms. Allocated memory is still 132.1MB. Free memory was 81.9MB in the beginning and 78.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-16 05:49:46,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory was 70.2MB in the beginning and 70.1MB in the end (delta: 45.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 182.83ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 53.2MB in the beginning and 88.5MB in the end (delta: -35.4MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.70ms. Allocated memory is still 109.1MB. Free memory was 88.5MB in the beginning and 86.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.28ms. Allocated memory is still 109.1MB. Free memory was 86.7MB in the beginning and 85.8MB in the end (delta: 889.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 345.54ms. Allocated memory is still 109.1MB. Free memory was 85.4MB in the beginning and 73.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9809.38ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 72.8MB in the beginning and 82.7MB in the end (delta: -9.9MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. * Witness Printer took 48.87ms. Allocated memory is still 132.1MB. Free memory was 81.9MB in the beginning and 78.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 9.7s, OverallIterations: 18, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1595 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1583 mSDsluCounter, 2236 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 35 IncrementalHoareTripleChecker+Unchecked, 1597 mSDsCounter, 425 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2021 IncrementalHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 425 mSolverCounterUnsat, 639 mSDtfsCounter, 2021 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 667 GetRequests, 448 SyntacticMatches, 6 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=5, InterpolantAutomatonStates: 142, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 250 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 710 NumberOfCodeBlocks, 693 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 845 ConstructedInterpolants, 16 QuantifiedInterpolants, 5143 SizeOfPredicates, 31 NumberOfNonLiveVariables, 892 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 29 InterpolantComputations, 14 PerfectInterpolantSequences, 248/314 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-16 05:49:46,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE