./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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_m4.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 aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:36:59,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:36:59,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:36:59,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:36:59,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:36:59,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:36:59,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:36:59,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:36:59,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:36:59,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:36:59,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:36:59,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:36:59,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:36:59,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:36:59,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:36:59,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:36:59,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:36:59,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:36:59,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:36:59,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:36:59,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:36:59,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:36:59,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:36:59,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:36:59,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:36:59,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:36:59,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:36:59,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:36:59,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:36:59,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:36:59,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:36:59,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:36:59,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:36:59,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:36:59,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:36:59,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:36:59,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:36:59,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:36:59,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:36:59,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:36:59,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:36:59,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:36:59,567 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:36:59,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:36:59,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:36:59,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:36:59,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:36:59,568 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:36:59,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:36:59,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:36:59,569 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:36:59,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:36:59,570 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:36:59,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:36:59,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:36:59,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:36:59,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:36:59,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:36:59,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:36:59,571 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:36:59,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:36:59,571 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:36:59,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:36:59,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:36:59,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:36:59,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:36:59,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:36:59,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:36:59,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:36:59,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:36:59,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:36:59,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:36:59,572 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:36:59,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:36:59,573 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:36:59,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:36:59,573 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:36:59,573 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 [2023-02-15 18:36:59,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:36:59,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:36:59,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:36:59,750 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:36:59,750 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:36:59,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2023-02-15 18:37:00,668 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:37:00,818 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:37:00,818 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2023-02-15 18:37:00,826 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1acec87c0/f467ef5a88e340e5af2672b51bf2f4fd/FLAG5a061bc97 [2023-02-15 18:37:00,841 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1acec87c0/f467ef5a88e340e5af2672b51bf2f4fd [2023-02-15 18:37:00,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:37:00,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:37:00,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:37:00,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:37:00,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:37:00,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:00,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73994691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00, skipping insertion in model container [2023-02-15 18:37:00,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:00,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:37:00,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:37:00,950 WARN L237 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_m4.c[408,421] [2023-02-15 18:37:00,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:37:00,969 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:37:00,976 WARN L237 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_m4.c[408,421] [2023-02-15 18:37:00,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:37:00,991 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:37:00,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00 WrapperNode [2023-02-15 18:37:00,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:37:00,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:37:00,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:37:00,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:37:00,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,013 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2023-02-15 18:37:01,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:37:01,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:37:01,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:37:01,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:37:01,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:37:01,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:37:01,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:37:01,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:37:01,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (1/1) ... [2023-02-15 18:37:01,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:37:01,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:37:01,052 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) [2023-02-15 18:37:01,059 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 [2023-02-15 18:37:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:37:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:37:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:37:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 18:37:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:37:01,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:37:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:37:01,131 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:37:01,132 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:37:01,253 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:37:01,258 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:37:01,258 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2023-02-15 18:37:01,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:37:01 BoogieIcfgContainer [2023-02-15 18:37:01,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:37:01,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:37:01,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:37:01,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:37:01,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:37:00" (1/3) ... [2023-02-15 18:37:01,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d882a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:37:01, skipping insertion in model container [2023-02-15 18:37:01,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:37:00" (2/3) ... [2023-02-15 18:37:01,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d882a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:37:01, skipping insertion in model container [2023-02-15 18:37:01,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:37:01" (3/3) ... [2023-02-15 18:37:01,265 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2023-02-15 18:37:01,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:37:01,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:37:01,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:37:01,320 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@30f3c7cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:37:01,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:37:01,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 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) [2023-02-15 18:37:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 18:37:01,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:37:01,327 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] [2023-02-15 18:37:01,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:37:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:37:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2023-02-15 18:37:01,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:37:01,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875245636] [2023-02-15 18:37:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:37:01,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:37:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:37:01,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:37:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875245636] [2023-02-15 18:37:01,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875245636] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:37:01,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:37:01,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 18:37:01,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132944534] [2023-02-15 18:37:01,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:37:01,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:37:01,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:37:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:37:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:37:01,471 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 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 11.5) internal successors, (23), 2 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) [2023-02-15 18:37:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:37:01,484 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2023-02-15 18:37:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:37:01,486 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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 23 [2023-02-15 18:37:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:37:01,491 INFO L225 Difference]: With dead ends: 71 [2023-02-15 18:37:01,491 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 18:37:01,493 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 [2023-02-15 18:37:01,495 INFO L413 NwaCegarLoop]: 47 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, 47 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 [2023-02-15 18:37:01,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:37:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 18:37:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-15 18:37:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2023-02-15 18:37:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-02-15 18:37:01,517 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2023-02-15 18:37:01,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:37:01,517 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-02-15 18:37:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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) [2023-02-15 18:37:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-02-15 18:37:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 18:37:01,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:37:01,518 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] [2023-02-15 18:37:01,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 18:37:01,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:37:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:37:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2023-02-15 18:37:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:37:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664901782] [2023-02-15 18:37:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:37:01,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:37:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:37:01,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:37:01,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664901782] [2023-02-15 18:37:01,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664901782] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:37:01,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:37:01,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:37:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553642043] [2023-02-15 18:37:01,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:37:01,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:37:01,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:37:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:37:01,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:37:01,629 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2023-02-15 18:37:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:37:01,695 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-02-15 18:37:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:37:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2023-02-15 18:37:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:37:01,696 INFO L225 Difference]: With dead ends: 63 [2023-02-15 18:37:01,696 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 18:37:01,697 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 [2023-02-15 18:37:01,697 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:37:01,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:37:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 18:37:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-02-15 18:37:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2023-02-15 18:37:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-15 18:37:01,712 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2023-02-15 18:37:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:37:01,713 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-15 18:37:01,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2023-02-15 18:37:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-15 18:37:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 18:37:01,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:37:01,714 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] [2023-02-15 18:37:01,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 18:37:01,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:37:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:37:01,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2023-02-15 18:37:01,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:37:01,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829516472] [2023-02-15 18:37:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:37:01,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:37:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 18:37:01,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:37:01,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829516472] [2023-02-15 18:37:01,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829516472] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:37:01,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:37:01,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 18:37:01,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716210124] [2023-02-15 18:37:01,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:37:01,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 18:37:01,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:37:01,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 18:37:01,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:37:01,792 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-02-15 18:37:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:37:01,858 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2023-02-15 18:37:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 18:37:01,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 25 [2023-02-15 18:37:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:37:01,859 INFO L225 Difference]: With dead ends: 76 [2023-02-15 18:37:01,859 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 18:37:01,860 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 [2023-02-15 18:37:01,861 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:37:01,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 17 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:37:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 18:37:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2023-02-15 18:37:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 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) [2023-02-15 18:37:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-02-15 18:37:01,869 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2023-02-15 18:37:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:37:01,870 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-02-15 18:37:01,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-02-15 18:37:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-02-15 18:37:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 18:37:01,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:37:01,871 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] [2023-02-15 18:37:01,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 18:37:01,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:37:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:37:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2023-02-15 18:37:01,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:37:01,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376428313] [2023-02-15 18:37:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:37:01,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:37:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 18:37:01,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:37:01,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376428313] [2023-02-15 18:37:01,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376428313] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:37:01,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602363689] [2023-02-15 18:37:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:37:01,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:37:01,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:37:01,978 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) [2023-02-15 18:37:01,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:37:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:37:02,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:37:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 18:37:02,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:37:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 18:37:02,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602363689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:37:02,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:37:02,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 18:37:02,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726341912] [2023-02-15 18:37:02,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:37:02,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 18:37:02,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:37:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 18:37:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:37:02,104 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2023-02-15 18:37:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:37:02,170 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2023-02-15 18:37:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 18:37:02,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 41 [2023-02-15 18:37:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:37:02,171 INFO L225 Difference]: With dead ends: 81 [2023-02-15 18:37:02,171 INFO L226 Difference]: Without dead ends: 45 [2023-02-15 18:37:02,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:37:02,173 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:37:02,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:37:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-15 18:37:02,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-02-15 18:37:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 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) [2023-02-15 18:37:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-02-15 18:37:02,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2023-02-15 18:37:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:37:02,178 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-02-15 18:37:02,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2023-02-15 18:37:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-02-15 18:37:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 18:37:02,179 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:37:02,179 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] [2023-02-15 18:37:02,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 18:37:02,384 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 [2023-02-15 18:37:02,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:37:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:37:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2023-02-15 18:37:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:37:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951738668] [2023-02-15 18:37:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:37:02,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:37:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 18:37:02,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:37:02,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951738668] [2023-02-15 18:37:02,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951738668] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:37:02,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475292009] [2023-02-15 18:37:02,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:37:02,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:37:02,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:37:02,496 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) [2023-02-15 18:37:02,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:37:02,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:37:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:37:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:37:02,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:37:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 18:37:02,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:37:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 18:37:02,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475292009] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:37:02,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:37:02,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 18:37:02,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161356227] [2023-02-15 18:37:02,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:37:02,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 18:37:02,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:37:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 18:37:02,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-15 18:37:02,655 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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) [2023-02-15 18:37:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:37:02,739 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2023-02-15 18:37:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 18:37:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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 43 [2023-02-15 18:37:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:37:02,740 INFO L225 Difference]: With dead ends: 101 [2023-02-15 18:37:02,741 INFO L226 Difference]: Without dead ends: 69 [2023-02-15 18:37:02,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:37:02,742 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:37:02,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 20 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:37:02,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-15 18:37:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2023-02-15 18:37:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 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) [2023-02-15 18:37:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-02-15 18:37:02,747 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2023-02-15 18:37:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:37:02,747 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-02-15 18:37:02,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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) [2023-02-15 18:37:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-02-15 18:37:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 18:37:02,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:37:02,748 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 18:37:02,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 18:37:02,961 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 [2023-02-15 18:37:02,961 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:37:02,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:37:02,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2023-02-15 18:37:02,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:37:02,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380190537] [2023-02-15 18:37:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:37:02,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:37:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:37:06,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:37:06,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380190537] [2023-02-15 18:37:06,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380190537] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:37:06,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812289248] [2023-02-15 18:37:06,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:37:06,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:37:06,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:37:06,101 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) [2023-02-15 18:37:06,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:37:06,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 18:37:06,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:37:06,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-15 18:37:06,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:37:11,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:37:11,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2023-02-15 18:37:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:37:11,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:37:29,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:37:29,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 75 [2023-02-15 18:37:30,165 INFO L321 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2023-02-15 18:37:30,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 18 [2023-02-15 18:37:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:37:41,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812289248] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:37:41,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:37:41,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 47, 46] total 123 [2023-02-15 18:37:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586183257] [2023-02-15 18:37:41,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:37:41,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-02-15 18:37:41,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:37:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-02-15 18:37:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=14166, Unknown=5, NotChecked=0, Total=15006 [2023-02-15 18:37:41,327 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 123 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 123 states have internal predecessors, (169), 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) [2023-02-15 18:38:04,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:38:25,015 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 157 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:38:26,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:38:30,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:38:31,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:38:34,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:38:45,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:38:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:38:57,441 INFO L93 Difference]: Finished difference Result 170 states and 194 transitions. [2023-02-15 18:38:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-15 18:38:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 123 states have internal predecessors, (169), 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 59 [2023-02-15 18:38:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:38:57,442 INFO L225 Difference]: With dead ends: 170 [2023-02-15 18:38:57,442 INFO L226 Difference]: Without dead ends: 164 [2023-02-15 18:38:57,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 27 SyntacticMatches, 14 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9428 ImplicationChecksByTransitivity, 86.8s TimeCoverageRelationStatistics Valid=2419, Invalid=39806, Unknown=5, NotChecked=0, Total=42230 [2023-02-15 18:38:57,468 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 4482 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 4634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 4482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:38:57,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 248 Invalid, 4634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 4482 Invalid, 0 Unknown, 0 Unchecked, 22.2s Time] [2023-02-15 18:38:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-15 18:38:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2023-02-15 18:38:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 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) [2023-02-15 18:38:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2023-02-15 18:38:57,499 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2023-02-15 18:38:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:38:57,500 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2023-02-15 18:38:57,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 123 states have internal predecessors, (169), 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) [2023-02-15 18:38:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2023-02-15 18:38:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 18:38:57,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:38:57,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-02-15 18:38:57,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:38:57,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:57,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:38:57,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:38:57,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2023-02-15 18:38:57,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:38:57,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271331103] [2023-02-15 18:38:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:38:57,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:38:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:38:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 18:38:57,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:38:57,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271331103] [2023-02-15 18:38:57,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271331103] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:38:57,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409809859] [2023-02-15 18:38:57,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:38:57,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:57,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:38:57,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:38:57,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:38:57,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:38:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:38:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:38:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:38:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 18:38:57,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:38:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 18:38:58,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409809859] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:38:58,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:38:58,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 18:38:58,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821700972] [2023-02-15 18:38:58,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:38:58,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 18:38:58,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:38:58,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 18:38:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:38:58,061 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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) [2023-02-15 18:38:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:38:58,328 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2023-02-15 18:38:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 18:38:58,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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 61 [2023-02-15 18:38:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:38:58,331 INFO L225 Difference]: With dead ends: 233 [2023-02-15 18:38:58,331 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 18:38:58,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:38:58,335 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:38:58,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 43 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:38:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 18:38:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2023-02-15 18:38:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 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) [2023-02-15 18:38:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2023-02-15 18:38:58,350 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2023-02-15 18:38:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:38:58,351 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2023-02-15 18:38:58,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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) [2023-02-15 18:38:58,351 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2023-02-15 18:38:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 18:38:58,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:38:58,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-02-15 18:38:58,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 18:38:58,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:58,560 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:38:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:38:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2023-02-15 18:38:58,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:38:58,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818110269] [2023-02-15 18:38:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:38:58,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:38:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:38:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 18:38:58,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:38:58,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818110269] [2023-02-15 18:38:58,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818110269] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:38:58,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59022419] [2023-02-15 18:38:58,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:38:58,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:58,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:38:58,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:38:58,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:38:58,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 18:38:58,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:38:58,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:38:58,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:38:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 18:38:58,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:38:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 18:38:58,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59022419] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:38:58,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:38:58,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 18:38:58,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460662433] [2023-02-15 18:38:58,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:38:58,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 18:38:58,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:38:58,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 18:38:58,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:38:58,835 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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) [2023-02-15 18:38:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:38:59,056 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2023-02-15 18:38:59,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 18:38:59,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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 63 [2023-02-15 18:38:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:38:59,057 INFO L225 Difference]: With dead ends: 126 [2023-02-15 18:38:59,057 INFO L226 Difference]: Without dead ends: 86 [2023-02-15 18:38:59,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-02-15 18:38:59,058 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 166 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:38:59,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 28 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:38:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-15 18:38:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-02-15 18:38:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 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) [2023-02-15 18:38:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-02-15 18:38:59,061 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2023-02-15 18:38:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:38:59,062 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-02-15 18:38:59,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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) [2023-02-15 18:38:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-02-15 18:38:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-15 18:38:59,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:38:59,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:38:59,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:38:59,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:59,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:38:59,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:38:59,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2023-02-15 18:38:59,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:38:59,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376664633] [2023-02-15 18:38:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:38:59,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:38:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:39:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:39:05,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:39:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376664633] [2023-02-15 18:39:05,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376664633] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:39:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099525555] [2023-02-15 18:39:05,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:39:05,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:39:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:39:05,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:39:05,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 18:39:05,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 18:39:05,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:39:05,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 119 conjunts are in the unsatisfiable core [2023-02-15 18:39:05,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:39:06,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 18:39:15,752 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:39:15,752 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:39:15,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:39:15,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:39:15,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:39:15,755 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:39:15,756 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:39:15,756 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:39:15,757 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:39:15,774 INFO L321 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2023-02-15 18:39:15,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 62 treesize of output 31 [2023-02-15 18:39:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:39:15,933 INFO L328 TraceCheckSpWp]: Computing backward predicates...