./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10a3b461143c2c5d394f7bd34cd6fefed4195b79a5252178f7ede404a303cf96 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:35:23,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:35:23,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:35:23,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:35:23,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:35:23,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:35:23,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:35:23,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:35:23,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:35:23,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:35:23,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:35:23,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:35:23,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:35:23,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:35:23,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:35:23,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:35:23,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:35:23,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:35:23,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:35:23,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:35:23,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:35:23,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:35:23,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:35:23,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:35:23,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:35:23,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:35:23,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:35:23,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:35:23,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:35:23,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:35:23,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:35:23,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:35:23,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:35:23,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:35:23,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:35:23,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:35:23,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:35:23,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:35:23,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:35:23,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:35:23,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:35:23,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:35:23,532 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:35:23,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:35:23,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:35:23,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:35:23,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:35:23,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:35:23,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:35:23,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:35:23,534 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:35:23,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:35:23,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:35:23,535 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:35:23,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:35:23,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:35:23,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:35:23,536 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:35:23,536 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:35:23,536 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:35:23,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:35:23,536 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:35:23,536 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:35:23,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:35:23,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:35:23,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:35:23,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:35:23,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:23,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:35:23,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:35:23,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:35:23,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:35:23,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:35:23,538 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10a3b461143c2c5d394f7bd34cd6fefed4195b79a5252178f7ede404a303cf96 [2021-12-18 19:35:23,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:35:23,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:35:23,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:35:23,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:35:23,736 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:35:23,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2021-12-18 19:35:23,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3215d77ca/ce31e7d9bb9344f798fec0c667f0ce3d/FLAG232079382 [2021-12-18 19:35:24,224 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:35:24,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2021-12-18 19:35:24,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3215d77ca/ce31e7d9bb9344f798fec0c667f0ce3d/FLAG232079382 [2021-12-18 19:35:24,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3215d77ca/ce31e7d9bb9344f798fec0c667f0ce3d [2021-12-18 19:35:24,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:35:24,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:35:24,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:24,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:35:24,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:35:24,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9af9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24, skipping insertion in model container [2021-12-18 19:35:24,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:35:24,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:35:24,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:24,480 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:35:24,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:24,546 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:35:24,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24 WrapperNode [2021-12-18 19:35:24,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:24,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:24,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:35:24,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:35:24,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,590 INFO L137 Inliner]: procedures = 118, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-12-18 19:35:24,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:24,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:35:24,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:35:24,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:35:24,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:35:24,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:35:24,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:35:24,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:35:24,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:24,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:24,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 19:35:24,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 19:35:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:35:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:35:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 19:35:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:35:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:35:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:35:24,823 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:35:24,824 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:35:24,951 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:35:24,956 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:35:24,956 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 19:35:24,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:24 BoogieIcfgContainer [2021-12-18 19:35:24,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:35:24,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:35:24,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:35:24,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:35:24,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:35:24" (1/3) ... [2021-12-18 19:35:24,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbfe876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:24, skipping insertion in model container [2021-12-18 19:35:24,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (2/3) ... [2021-12-18 19:35:24,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbfe876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:24, skipping insertion in model container [2021-12-18 19:35:24,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:24" (3/3) ... [2021-12-18 19:35:24,963 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2021-12-18 19:35:24,966 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:35:24,967 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-12-18 19:35:24,993 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:35:24,998 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 19:35:24,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-12-18 19:35:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 44 states have internal predecessors, (51), 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) [2021-12-18 19:35:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:25,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,014 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,017 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-18 19:35:25,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648249440] [2021-12-18 19:35:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648249440] [2021-12-18 19:35:25,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648249440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:25,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:25,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900987084] [2021-12-18 19:35:25,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:25,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:25,190 INFO L87 Difference]: Start difference. First operand has 45 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-18 19:35:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,243 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-12-18 19:35:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:25,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:35:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:25,251 INFO L225 Difference]: With dead ends: 82 [2021-12-18 19:35:25,251 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 19:35:25,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:25,256 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:25,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 19:35:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2021-12-18 19:35:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 44 states have internal predecessors, (49), 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) [2021-12-18 19:35:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-12-18 19:35:25,303 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 6 [2021-12-18 19:35:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:25,303 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-12-18 19:35:25,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-18 19:35:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-12-18 19:35:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:25,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:35:25,305 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:25,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,328 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-12-18 19:35:25,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849398384] [2021-12-18 19:35:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849398384] [2021-12-18 19:35:25,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849398384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:25,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:25,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390823600] [2021-12-18 19:35:25,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:25,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:25,463 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-12-18 19:35:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,562 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-12-18 19:35:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:35:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:25,563 INFO L225 Difference]: With dead ends: 75 [2021-12-18 19:35:25,564 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 19:35:25,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:25,566 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:25,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 76 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 19:35:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 43. [2021-12-18 19:35:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 42 states have internal predecessors, (47), 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) [2021-12-18 19:35:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-12-18 19:35:25,575 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 6 [2021-12-18 19:35:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:25,576 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-12-18 19:35:25,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-12-18 19:35:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-12-18 19:35:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:25,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:35:25,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:25,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-12-18 19:35:25,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054579470] [2021-12-18 19:35:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054579470] [2021-12-18 19:35:25,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054579470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:25,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:25,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338329133] [2021-12-18 19:35:25,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:25,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:25,678 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-18 19:35:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,713 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-18 19:35:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:35:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:25,715 INFO L225 Difference]: With dead ends: 42 [2021-12-18 19:35:25,715 INFO L226 Difference]: Without dead ends: 42 [2021-12-18 19:35:25,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:25,720 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:25,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-18 19:35:25,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-18 19:35:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 41 states have internal predecessors, (46), 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) [2021-12-18 19:35:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-18 19:35:25,728 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 6 [2021-12-18 19:35:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:25,729 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-18 19:35:25,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-18 19:35:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-18 19:35:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:25,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:35:25,731 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,747 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-18 19:35:25,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472135160] [2021-12-18 19:35:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472135160] [2021-12-18 19:35:25,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472135160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:25,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:25,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001946579] [2021-12-18 19:35:25,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:25,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:25,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:25,854 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-12-18 19:35:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,910 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-12-18 19:35:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:25,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:35:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:25,913 INFO L225 Difference]: With dead ends: 77 [2021-12-18 19:35:25,914 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 19:35:25,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:25,921 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:25,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 57 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 19:35:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2021-12-18 19:35:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 43 states have internal predecessors, (49), 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) [2021-12-18 19:35:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-12-18 19:35:25,928 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 6 [2021-12-18 19:35:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:25,929 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-12-18 19:35:25,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-12-18 19:35:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-12-18 19:35:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:35:25,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:35:25,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash -590959631, now seen corresponding path program 1 times [2021-12-18 19:35:25,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079038084] [2021-12-18 19:35:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079038084] [2021-12-18 19:35:26,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079038084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:26,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286409999] [2021-12-18 19:35:26,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:26,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:26,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:26,016 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-12-18 19:35:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,076 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-18 19:35:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:26,077 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 19:35:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,078 INFO L225 Difference]: With dead ends: 41 [2021-12-18 19:35:26,078 INFO L226 Difference]: Without dead ends: 41 [2021-12-18 19:35:26,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:26,078 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 38 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:26,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-18 19:35:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-18 19:35:26,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 40 states have internal predecessors, (46), 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) [2021-12-18 19:35:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-12-18 19:35:26,083 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 9 [2021-12-18 19:35:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,083 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-12-18 19:35:26,083 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), 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) [2021-12-18 19:35:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-12-18 19:35:26,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:35:26,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:35:26,103 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash -590959630, now seen corresponding path program 1 times [2021-12-18 19:35:26,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447354305] [2021-12-18 19:35:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447354305] [2021-12-18 19:35:26,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447354305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:26,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872647361] [2021-12-18 19:35:26,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:35:26,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:35:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:35:26,229 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-12-18 19:35:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,321 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-12-18 19:35:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:35:26,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 19:35:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,323 INFO L225 Difference]: With dead ends: 63 [2021-12-18 19:35:26,323 INFO L226 Difference]: Without dead ends: 63 [2021-12-18 19:35:26,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:26,325 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 191 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 55 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-18 19:35:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2021-12-18 19:35:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-18 19:35:26,339 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 9 [2021-12-18 19:35:26,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,339 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-18 19:35:26,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-12-18 19:35:26,339 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-18 19:35:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:26,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,340 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:35:26,340 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-18 19:35:26,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591252670] [2021-12-18 19:35:26,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591252670] [2021-12-18 19:35:26,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591252670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387818391] [2021-12-18 19:35:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:26,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:26,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:26,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:35:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 19:35:26,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:26,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387818391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:26,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:26,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-18 19:35:26,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328711436] [2021-12-18 19:35:26,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:35:26,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:35:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:26,876 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,997 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2021-12-18 19:35:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:26,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 19:35:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,998 INFO L225 Difference]: With dead ends: 120 [2021-12-18 19:35:26,998 INFO L226 Difference]: Without dead ends: 120 [2021-12-18 19:35:26,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:35:26,999 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 226 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 218 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-18 19:35:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 45. [2021-12-18 19:35:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 44 states have internal predecessors, (51), 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) [2021-12-18 19:35:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-12-18 19:35:27,001 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 10 [2021-12-18 19:35:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,002 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-12-18 19:35:27,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-12-18 19:35:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:35:27,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 19:35:27,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:27,216 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2134761079, now seen corresponding path program 1 times [2021-12-18 19:35:27,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959372961] [2021-12-18 19:35:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:27,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959372961] [2021-12-18 19:35:27,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959372961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:27,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:27,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:27,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015981388] [2021-12-18 19:35:27,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:27,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:27,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:27,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:27,238 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-18 19:35:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:27,243 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-12-18 19:35:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:35:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:27,244 INFO L225 Difference]: With dead ends: 47 [2021-12-18 19:35:27,244 INFO L226 Difference]: Without dead ends: 47 [2021-12-18 19:35:27,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:27,245 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:27,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-18 19:35:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-18 19:35:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.394736842105263) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-12-18 19:35:27,247 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 13 [2021-12-18 19:35:27,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,247 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-12-18 19:35:27,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-18 19:35:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-12-18 19:35:27,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:35:27,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 19:35:27,249 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1483111174, now seen corresponding path program 1 times [2021-12-18 19:35:27,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975670454] [2021-12-18 19:35:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:27,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975670454] [2021-12-18 19:35:27,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975670454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:27,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:27,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 19:35:27,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416306762] [2021-12-18 19:35:27,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:27,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:35:27,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:27,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:35:27,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:27,327 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-12-18 19:35:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:27,432 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-12-18 19:35:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:35:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:35:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:27,433 INFO L225 Difference]: With dead ends: 70 [2021-12-18 19:35:27,433 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 19:35:27,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:35:27,434 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 109 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:27,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 194 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:27,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 19:35:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-12-18 19:35:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-12-18 19:35:27,436 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 15 [2021-12-18 19:35:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,436 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-12-18 19:35:27,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-12-18 19:35:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-12-18 19:35:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:35:27,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 19:35:27,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,437 INFO L85 PathProgramCache]: Analyzing trace with hash 896305160, now seen corresponding path program 1 times [2021-12-18 19:35:27,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140028886] [2021-12-18 19:35:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:27,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140028886] [2021-12-18 19:35:27,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140028886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:27,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:27,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 19:35:27,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926842356] [2021-12-18 19:35:27,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:27,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:35:27,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:27,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:35:27,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:27,573 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-12-18 19:35:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:27,667 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-18 19:35:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:35:27,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:35:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:27,668 INFO L225 Difference]: With dead ends: 80 [2021-12-18 19:35:27,668 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 19:35:27,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:35:27,668 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:27,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 178 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 19:35:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-12-18 19:35:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 53 states have internal predecessors, (61), 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) [2021-12-18 19:35:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-18 19:35:27,672 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 15 [2021-12-18 19:35:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,672 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-18 19:35:27,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-12-18 19:35:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-18 19:35:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:35:27,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 19:35:27,673 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash 639793573, now seen corresponding path program 1 times [2021-12-18 19:35:27,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198588991] [2021-12-18 19:35:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:27,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198588991] [2021-12-18 19:35:27,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198588991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:27,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:27,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:27,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728608392] [2021-12-18 19:35:27,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:27,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:35:27,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:35:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:35:27,725 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-12-18 19:35:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:27,786 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-12-18 19:35:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:27,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:35:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:27,786 INFO L225 Difference]: With dead ends: 65 [2021-12-18 19:35:27,786 INFO L226 Difference]: Without dead ends: 65 [2021-12-18 19:35:27,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:27,787 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:27,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 87 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-18 19:35:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-12-18 19:35:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 56 states have internal predecessors, (65), 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) [2021-12-18 19:35:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-12-18 19:35:27,788 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 17 [2021-12-18 19:35:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,789 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-12-18 19:35:27,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-12-18 19:35:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-12-18 19:35:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:35:27,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 19:35:27,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 639793574, now seen corresponding path program 1 times [2021-12-18 19:35:27,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250149720] [2021-12-18 19:35:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:27,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250149720] [2021-12-18 19:35:27,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250149720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:27,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:27,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 19:35:27,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030761339] [2021-12-18 19:35:27,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:27,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:35:27,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:35:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:27,871 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 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) [2021-12-18 19:35:27,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:27,969 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-12-18 19:35:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:35:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:27,970 INFO L225 Difference]: With dead ends: 84 [2021-12-18 19:35:27,970 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 19:35:27,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:35:27,983 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 235 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:27,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 112 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 19:35:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2021-12-18 19:35:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 60 states have internal predecessors, (70), 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) [2021-12-18 19:35:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-12-18 19:35:27,986 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 17 [2021-12-18 19:35:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,986 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-12-18 19:35:27,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 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) [2021-12-18 19:35:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-12-18 19:35:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:35:27,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 19:35:27,988 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 19:35:27,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,989 INFO L85 PathProgramCache]: Analyzing trace with hash 639853155, now seen corresponding path program 1 times [2021-12-18 19:35:27,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696345380] [2021-12-18 19:35:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 19:35:28,002 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-18 19:35:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 19:35:28,037 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-18 19:35:28,037 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-18 19:35:28,038 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (15 of 16 remaining) [2021-12-18 19:35:28,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (14 of 16 remaining) [2021-12-18 19:35:28,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (13 of 16 remaining) [2021-12-18 19:35:28,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (12 of 16 remaining) [2021-12-18 19:35:28,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (11 of 16 remaining) [2021-12-18 19:35:28,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (10 of 16 remaining) [2021-12-18 19:35:28,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (9 of 16 remaining) [2021-12-18 19:35:28,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (8 of 16 remaining) [2021-12-18 19:35:28,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (7 of 16 remaining) [2021-12-18 19:35:28,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (6 of 16 remaining) [2021-12-18 19:35:28,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (5 of 16 remaining) [2021-12-18 19:35:28,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (4 of 16 remaining) [2021-12-18 19:35:28,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (3 of 16 remaining) [2021-12-18 19:35:28,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (2 of 16 remaining) [2021-12-18 19:35:28,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (1 of 16 remaining) [2021-12-18 19:35:28,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2021-12-18 19:35:28,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 19:35:28,055 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:28,058 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 19:35:28,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:35:28 BoogieIcfgContainer [2021-12-18 19:35:28,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 19:35:28,107 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 19:35:28,107 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 19:35:28,107 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 19:35:28,107 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:24" (3/4) ... [2021-12-18 19:35:28,108 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-18 19:35:28,162 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 19:35:28,162 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 19:35:28,163 INFO L158 Benchmark]: Toolchain (without parser) took 3920.68ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 77.1MB in the beginning and 63.3MB in the end (delta: 13.8MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. [2021-12-18 19:35:28,163 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:35:28,163 INFO L158 Benchmark]: CACSL2BoogieTranslator took 303.77ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 77.1MB in the beginning and 117.9MB in the end (delta: -40.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 19:35:28,163 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.35ms. Allocated memory is still 146.8MB. Free memory was 117.9MB in the beginning and 115.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:35:28,166 INFO L158 Benchmark]: Boogie Preprocessor took 42.88ms. Allocated memory is still 146.8MB. Free memory was 115.8MB in the beginning and 114.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:35:28,167 INFO L158 Benchmark]: RCFGBuilder took 323.30ms. Allocated memory is still 146.8MB. Free memory was 114.5MB in the beginning and 102.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-18 19:35:28,167 INFO L158 Benchmark]: TraceAbstraction took 3148.08ms. Allocated memory is still 146.8MB. Free memory was 101.5MB in the beginning and 65.4MB in the end (delta: 36.1MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. [2021-12-18 19:35:28,167 INFO L158 Benchmark]: Witness Printer took 55.64ms. Allocated memory is still 146.8MB. Free memory was 65.4MB in the beginning and 63.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:35:28,168 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 303.77ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 77.1MB in the beginning and 117.9MB in the end (delta: -40.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.35ms. Allocated memory is still 146.8MB. Free memory was 117.9MB in the beginning and 115.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.88ms. Allocated memory is still 146.8MB. Free memory was 115.8MB in the beginning and 114.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 323.30ms. Allocated memory is still 146.8MB. Free memory was 114.5MB in the beginning and 102.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3148.08ms. Allocated memory is still 146.8MB. Free memory was 101.5MB in the beginning and 65.4MB in the end (delta: 36.1MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. * Witness Printer took 55.64ms. Allocated memory is still 146.8MB. Free memory was 65.4MB in the beginning and 63.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 - CounterExampleResult [Line: 537]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L536] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=0, length=1, nondetString={-1:0}] [L536] RET, EXPR build_nondet_String() [L536] char* s = build_nondet_String(); [L537] CALL cstrchr(s,__VERIFIER_nondet_int()) [L531] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] *s != '\0' && *s != (char)c VAL [*s != '\0' && *s != (char)c=0, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] EXPR (*s == c) ? (char *) s : 0 VAL [(*s == c) ? (char *) s : 0={0:0}, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] return ( (*s == c) ? (char *) s : 0 ); [L537] RET cstrchr(s,__VERIFIER_nondet_int()) - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 526]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 526]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 13, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1368 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1368 mSDsluCounter, 1241 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 857 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 751 IncrementalHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 384 mSDtfsCounter, 751 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=12, InterpolantAutomatonStates: 75, 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, 12 MinimizatonAttempts, 262 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 787 SizeOfPredicates, 1 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 14 InterpolantComputations, 11 PerfectInterpolantSequences, 4/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-18 19:35:28,212 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)