./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:46:58,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:46:58,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:46:58,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:46:58,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:46:58,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:46:58,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:46:58,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:46:58,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:46:58,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:46:58,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:46:58,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:46:58,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:46:58,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:46:58,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:46:58,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:46:58,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:46:58,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:46:58,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:46:58,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:46:58,528 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:46:58,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:46:58,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:46:58,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:46:58,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:46:58,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:46:58,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:46:58,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:46:58,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:46:58,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:46:58,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:46:58,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:46:58,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:46:58,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:46:58,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:46:58,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:46:58,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:46:58,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:46:58,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:46:58,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:46:58,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:46:58,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:46:58,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:46:58,569 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:46:58,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:46:58,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:46:58,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:46:58,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:46:58,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:46:58,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:46:58,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:46:58,572 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:46:58,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:46:58,573 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:46:58,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:46:58,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:46:58,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:46:58,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:46:58,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:46:58,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:46:58,574 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:46:58,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:46:58,574 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:46:58,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:46:58,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:46:58,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:46:58,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:46:58,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:46:58,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:46:58,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:46:58,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:46:58,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:46:58,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:46:58,577 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:46:58,577 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:46:58,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:46:58,577 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 [2022-07-11 22:46:58,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:46:58,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:46:58,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:46:58,789 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:46:58,789 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:46:58,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2022-07-11 22:46:58,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a94ed18fb/ce10141fc7134797931ff58435dbcef3/FLAG0431bea1b [2022-07-11 22:46:59,189 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:46:59,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2022-07-11 22:46:59,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a94ed18fb/ce10141fc7134797931ff58435dbcef3/FLAG0431bea1b [2022-07-11 22:46:59,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a94ed18fb/ce10141fc7134797931ff58435dbcef3 [2022-07-11 22:46:59,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:46:59,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:46:59,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:46:59,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:46:59,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:46:59,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cde0251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59, skipping insertion in model container [2022-07-11 22:46:59,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:46:59,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:46:59,344 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421] [2022-07-11 22:46:59,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:46:59,370 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:46:59,381 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421] [2022-07-11 22:46:59,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:46:59,406 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:46:59,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59 WrapperNode [2022-07-11 22:46:59,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:46:59,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:46:59,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:46:59,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:46:59,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,453 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2022-07-11 22:46:59,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:46:59,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:46:59,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:46:59,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:46:59,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:46:59,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:46:59,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:46:59,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:46:59,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (1/1) ... [2022-07-11 22:46:59,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:46:59,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:46:59,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 22:46:59,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 22:46:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:46:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:46:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:46:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 22:46:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:46:59,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:46:59,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:46:59,589 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:46:59,591 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:46:59,747 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:46:59,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:46:59,752 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-11 22:46:59,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:46:59 BoogieIcfgContainer [2022-07-11 22:46:59,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:46:59,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:46:59,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:46:59,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:46:59,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:46:59" (1/3) ... [2022-07-11 22:46:59,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4ea04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:46:59, skipping insertion in model container [2022-07-11 22:46:59,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:59" (2/3) ... [2022-07-11 22:46:59,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4ea04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:46:59, skipping insertion in model container [2022-07-11 22:46:59,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:46:59" (3/3) ... [2022-07-11 22:46:59,763 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2022-07-11 22:46:59,773 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:46:59,774 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:46:59,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:46:59,815 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2fc91ed5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1fbfc13a [2022-07-11 22:46:59,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:46:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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) [2022-07-11 22:46:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-11 22:46:59,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:46:59,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:46:59,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:46:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:46:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2022-07-11 22:46:59,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:46:59,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925724830] [2022-07-11 22:46:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:46:59,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:46:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:46:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:46:59,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:46:59,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925724830] [2022-07-11 22:46:59,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925724830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:46:59,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:46:59,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 22:46:59,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668205750] [2022-07-11 22:46:59,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:46:59,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 22:46:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:46:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 22:46:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:47:00,000 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2022-07-11 22:47:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:47:00,014 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2022-07-11 22:47:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 22:47:00,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2022-07-11 22:47:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:47:00,022 INFO L225 Difference]: With dead ends: 83 [2022-07-11 22:47:00,023 INFO L226 Difference]: Without dead ends: 39 [2022-07-11 22:47:00,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:47:00,030 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:47:00,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:47:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-11 22:47:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-11 22:47:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 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) [2022-07-11 22:47:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-07-11 22:47:00,052 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2022-07-11 22:47:00,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:47:00,053 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-07-11 22:47:00,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2022-07-11 22:47:00,053 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-07-11 22:47:00,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-11 22:47:00,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:47:00,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:47:00,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:47:00,055 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:47:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:47:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2022-07-11 22:47:00,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:47:00,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704319509] [2022-07-11 22:47:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:47:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:47:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:47:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:47:00,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:47:00,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704319509] [2022-07-11 22:47:00,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704319509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:47:00,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:47:00,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:47:00,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94997094] [2022-07-11 22:47:00,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:47:00,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:47:00,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:47:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:47:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:47:00,101 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-07-11 22:47:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:47:00,168 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-07-11 22:47:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:47:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2022-07-11 22:47:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:47:00,169 INFO L225 Difference]: With dead ends: 75 [2022-07-11 22:47:00,169 INFO L226 Difference]: Without dead ends: 41 [2022-07-11 22:47:00,170 INFO L412 NwaCegarLoop]: 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 [2022-07-11 22:47:00,171 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:47:00,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:47:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-11 22:47:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-07-11 22:47:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2022-07-11 22:47:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-07-11 22:47:00,183 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2022-07-11 22:47:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:47:00,183 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-07-11 22:47:00,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-07-11 22:47:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-07-11 22:47:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-11 22:47:00,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:47:00,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:47:00,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 22:47:00,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:47:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:47:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2022-07-11 22:47:00,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:47:00,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197824903] [2022-07-11 22:47:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:47:00,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:47:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:47:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:47:00,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:47:00,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197824903] [2022-07-11 22:47:00,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197824903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:47:00,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:47:00,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:47:00,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263101901] [2022-07-11 22:47:00,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:47:00,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:47:00,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:47:00,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:47:00,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:47:00,263 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-07-11 22:47:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:47:00,367 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2022-07-11 22:47:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:47:00,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 29 [2022-07-11 22:47:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:47:00,368 INFO L225 Difference]: With dead ends: 92 [2022-07-11 22:47:00,368 INFO L226 Difference]: Without dead ends: 61 [2022-07-11 22:47:00,368 INFO L412 NwaCegarLoop]: 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 [2022-07-11 22:47:00,369 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:47:00,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:47:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-11 22:47:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-07-11 22:47:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2022-07-11 22:47:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-11 22:47:00,375 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2022-07-11 22:47:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:47:00,376 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-11 22:47:00,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-07-11 22:47:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-11 22:47:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 22:47:00,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:47:00,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:47:00,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 22:47:00,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:47:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:47:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2022-07-11 22:47:00,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:47:00,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151403838] [2022-07-11 22:47:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:47:00,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:47:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:47:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 22:47:00,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:47:00,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151403838] [2022-07-11 22:47:00,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151403838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:47:00,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515052450] [2022-07-11 22:47:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:47:00,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:47:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:47:00,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:47:00,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:47:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:47:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:47:00,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:47:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 22:47:00,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:47:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 22:47:00,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515052450] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:47:00,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:47:00,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-11 22:47:00,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915532860] [2022-07-11 22:47:00,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:47:00,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 22:47:00,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:47:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 22:47:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:47:00,625 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-07-11 22:47:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:47:00,760 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2022-07-11 22:47:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 22:47:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 49 [2022-07-11 22:47:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:47:00,761 INFO L225 Difference]: With dead ends: 97 [2022-07-11 22:47:00,761 INFO L226 Difference]: Without dead ends: 53 [2022-07-11 22:47:00,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:47:00,769 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:47:00,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:47:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-11 22:47:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-07-11 22:47:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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) [2022-07-11 22:47:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-07-11 22:47:00,784 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2022-07-11 22:47:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:47:00,785 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-07-11 22:47:00,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-07-11 22:47:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-07-11 22:47:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 22:47:00,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:47:00,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:47:00,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 22:47:01,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:47:01,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:47:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:47:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2022-07-11 22:47:01,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:47:01,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307582980] [2022-07-11 22:47:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:47:01,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:47:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:47:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 22:47:01,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:47:01,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307582980] [2022-07-11 22:47:01,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307582980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:47:01,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932050704] [2022-07-11 22:47:01,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:47:01,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:47:01,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:47:01,090 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:47:01,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:47:01,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:47:01,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:47:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:47:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:47:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 22:47:01,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:47:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 22:47:01,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932050704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:47:01,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:47:01,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-11 22:47:01,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446009694] [2022-07-11 22:47:01,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:47:01,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 22:47:01,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:47:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 22:47:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-11 22:47:01,307 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2022-07-11 22:47:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:47:01,439 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2022-07-11 22:47:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 22:47:01,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 51 [2022-07-11 22:47:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:47:01,440 INFO L225 Difference]: With dead ends: 123 [2022-07-11 22:47:01,440 INFO L226 Difference]: Without dead ends: 83 [2022-07-11 22:47:01,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:47:01,441 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:47:01,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 22 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:47:01,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-11 22:47:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-07-11 22:47:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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) [2022-07-11 22:47:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-07-11 22:47:01,446 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2022-07-11 22:47:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:47:01,446 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-07-11 22:47:01,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2022-07-11 22:47:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-07-11 22:47:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 22:47:01,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:47:01,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:47:01,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:47:01,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:47:01,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:47:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:47:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2022-07-11 22:47:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:47:01,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909489118] [2022-07-11 22:47:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:47:01,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:47:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:47:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:47:03,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:47:03,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909489118] [2022-07-11 22:47:03,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909489118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:47:03,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163967644] [2022-07-11 22:47:03,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:47:03,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:47:03,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:47:03,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:47:03,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:47:03,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 22:47:03,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:47:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-11 22:47:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:47:13,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:47:13,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:47:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:47:13,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:47:13,643 INFO L356 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2022-07-11 22:47:13,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 22 [2022-07-11 22:47:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:47:13,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:47:49,578 INFO L356 Elim1Store]: treesize reduction 58, result has 72.5 percent of original size [2022-07-11 22:47:49,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 164 [2022-07-11 22:47:53,599 INFO L356 Elim1Store]: treesize reduction 194, result has 8.1 percent of original size [2022-07-11 22:47:53,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 27 [2022-07-11 22:48:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:48:22,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163967644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:48:22,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:48:22,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 57, 54] total 148 [2022-07-11 22:48:22,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595271729] [2022-07-11 22:48:22,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:48:22,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-07-11 22:48:22,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:48:22,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-07-11 22:48:22,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=20791, Unknown=14, NotChecked=0, Total=21756 [2022-07-11 22:48:22,165 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 148 states, 148 states have (on average 1.3581081081081081) internal successors, (201), 148 states have internal predecessors, (201), 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)