./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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_const2.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 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 11:07:06,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 11:07:06,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 11:07:06,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 11:07:06,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 11:07:06,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 11:07:06,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 11:07:06,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 11:07:06,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 11:07:06,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 11:07:06,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 11:07:06,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 11:07:06,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 11:07:06,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 11:07:06,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 11:07:06,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 11:07:06,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 11:07:06,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 11:07:06,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 11:07:06,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 11:07:06,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 11:07:06,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 11:07:06,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 11:07:06,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 11:07:06,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 11:07:06,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 11:07:06,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 11:07:06,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 11:07:06,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 11:07:06,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 11:07:06,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 11:07:06,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 11:07:06,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 11:07:06,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 11:07:06,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 11:07:06,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 11:07:06,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 11:07:06,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 11:07:06,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 11:07:06,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 11:07:06,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 11:07:06,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 11:07:06,695 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 11:07:06,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 11:07:06,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 11:07:06,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 11:07:06,697 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 11:07:06,697 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 11:07:06,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 11:07:06,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 11:07:06,698 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 11:07:06,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 11:07:06,699 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 11:07:06,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 11:07:06,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 11:07:06,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 11:07:06,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 11:07:06,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 11:07:06,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 11:07:06,700 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 11:07:06,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 11:07:06,700 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 11:07:06,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 11:07:06,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 11:07:06,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 11:07:06,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 11:07:06,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 11:07:06,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 11:07:06,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 11:07:06,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 11:07:06,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 11:07:06,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 11:07:06,702 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 11:07:06,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 11:07:06,703 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 11:07:06,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 11:07:06,703 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 11:07:06,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c [2023-02-18 11:07:06,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 11:07:06,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 11:07:06,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 11:07:06,993 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 11:07:06,994 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 11:07:06,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const2.c [2023-02-18 11:07:08,163 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 11:07:08,343 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 11:07:08,343 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c [2023-02-18 11:07:08,350 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7e512e14/3f397be7cbf44f1387c51ddbddaf7f35/FLAG3b4a955f6 [2023-02-18 11:07:08,366 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7e512e14/3f397be7cbf44f1387c51ddbddaf7f35 [2023-02-18 11:07:08,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 11:07:08,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 11:07:08,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 11:07:08,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 11:07:08,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 11:07:08,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d687381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08, skipping insertion in model container [2023-02-18 11:07:08,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 11:07:08,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 11:07:08,533 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_const2.c[406,419] [2023-02-18 11:07:08,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 11:07:08,554 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 11:07:08,564 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_const2.c[406,419] [2023-02-18 11:07:08,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 11:07:08,582 INFO L208 MainTranslator]: Completed translation [2023-02-18 11:07:08,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08 WrapperNode [2023-02-18 11:07:08,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 11:07:08,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 11:07:08,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 11:07:08,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 11:07:08,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,610 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2023-02-18 11:07:08,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 11:07:08,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 11:07:08,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 11:07:08,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 11:07:08,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 11:07:08,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 11:07:08,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 11:07:08,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 11:07:08,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (1/1) ... [2023-02-18 11:07:08,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 11:07:08,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:07:08,668 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) [2023-02-18 11:07:08,670 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 [2023-02-18 11:07:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 11:07:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 11:07:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 11:07:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 11:07:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 11:07:08,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 11:07:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 11:07:08,765 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 11:07:08,767 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 11:07:08,971 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 11:07:08,991 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 11:07:08,992 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-18 11:07:08,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:07:08 BoogieIcfgContainer [2023-02-18 11:07:08,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 11:07:08,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 11:07:08,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 11:07:08,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 11:07:08,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 11:07:08" (1/3) ... [2023-02-18 11:07:09,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fa81d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:07:09, skipping insertion in model container [2023-02-18 11:07:09,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:07:08" (2/3) ... [2023-02-18 11:07:09,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fa81d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:07:09, skipping insertion in model container [2023-02-18 11:07:09,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:07:08" (3/3) ... [2023-02-18 11:07:09,003 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2023-02-18 11:07:09,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 11:07:09,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 11:07:09,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 11:07:09,113 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;@11d9cd91, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 11:07:09,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 11:07:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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) [2023-02-18 11:07:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 11:07:09,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:07:09,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:07:09,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:07:09,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:07:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2023-02-18 11:07:09,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:07:09,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668450862] [2023-02-18 11:07:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:07:09,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:07:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:07:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 11:07:09,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:07:09,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668450862] [2023-02-18 11:07:09,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668450862] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 11:07:09,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 11:07:09,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 11:07:09,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676779886] [2023-02-18 11:07:09,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 11:07:09,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 11:07:09,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:07:09,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 11:07:09,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 11:07:09,380 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 11:07:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:07:09,394 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2023-02-18 11:07:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 11:07:09,396 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 11:07:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:07:09,401 INFO L225 Difference]: With dead ends: 47 [2023-02-18 11:07:09,401 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 11:07:09,404 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 [2023-02-18 11:07:09,406 INFO L413 NwaCegarLoop]: 31 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, 31 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 [2023-02-18 11:07:09,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 11:07:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 11:07:09,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-18 11:07:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2023-02-18 11:07:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-18 11:07:09,433 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2023-02-18 11:07:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:07:09,435 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-18 11:07:09,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 11:07:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-18 11:07:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 11:07:09,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:07:09,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:07:09,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 11:07:09,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:07:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:07:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2023-02-18 11:07:09,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:07:09,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540702446] [2023-02-18 11:07:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:07:09,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:07:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:07:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 11:07:09,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:07:09,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540702446] [2023-02-18 11:07:09,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540702446] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 11:07:09,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 11:07:09,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 11:07:09,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776689882] [2023-02-18 11:07:09,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 11:07:09,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 11:07:09,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:07:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 11:07:09,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 11:07:09,593 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 11:07:09,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:07:09,657 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-02-18 11:07:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 11:07:09,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 11:07:09,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:07:09,658 INFO L225 Difference]: With dead ends: 39 [2023-02-18 11:07:09,658 INFO L226 Difference]: Without dead ends: 23 [2023-02-18 11:07:09,659 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 [2023-02-18 11:07:09,660 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 11:07:09,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 11:07:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-18 11:07:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-02-18 11:07:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2023-02-18 11:07:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-18 11:07:09,670 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-02-18 11:07:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:07:09,671 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-18 11:07:09,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 11:07:09,673 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-18 11:07:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 11:07:09,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:07:09,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:07:09,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 11:07:09,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:07:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:07:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2023-02-18 11:07:09,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:07:09,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146102113] [2023-02-18 11:07:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:07:09,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:07:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:07:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 11:07:09,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:07:09,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146102113] [2023-02-18 11:07:09,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146102113] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 11:07:09,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 11:07:09,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 11:07:09,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142576942] [2023-02-18 11:07:09,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 11:07:09,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 11:07:09,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:07:09,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 11:07:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 11:07:09,788 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 11:07:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:07:09,854 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2023-02-18 11:07:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 11:07:09,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 11:07:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:07:09,856 INFO L225 Difference]: With dead ends: 44 [2023-02-18 11:07:09,856 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 11:07:09,860 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 [2023-02-18 11:07:09,863 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 11:07:09,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 13 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 11:07:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 11:07:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-02-18 11:07:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2023-02-18 11:07:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-18 11:07:09,878 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2023-02-18 11:07:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:07:09,878 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-18 11:07:09,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 11:07:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-18 11:07:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 11:07:09,880 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:07:09,880 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] [2023-02-18 11:07:09,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 11:07:09,881 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:07:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:07:09,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2023-02-18 11:07:09,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:07:09,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346762189] [2023-02-18 11:07:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:07:09,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:07:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:07:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 11:07:09,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:07:09,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346762189] [2023-02-18 11:07:09,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346762189] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 11:07:09,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400121030] [2023-02-18 11:07:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:07:09,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:07:09,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:07:09,993 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) [2023-02-18 11:07:10,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 11:07:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:07:10,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 11:07:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 11:07:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 11:07:10,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 11:07:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 11:07:10,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400121030] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 11:07:10,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 11:07:10,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 11:07:10,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003436935] [2023-02-18 11:07:10,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 11:07:10,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 11:07:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:07:10,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 11:07:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-18 11:07:10,156 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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) [2023-02-18 11:07:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:07:10,236 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2023-02-18 11:07:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 11:07:10,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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 [2023-02-18 11:07:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:07:10,239 INFO L225 Difference]: With dead ends: 49 [2023-02-18 11:07:10,239 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 11:07:10,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-18 11:07:10,242 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 11:07:10,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 11:07:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 11:07:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-18 11:07:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2023-02-18 11:07:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-02-18 11:07:10,251 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2023-02-18 11:07:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:07:10,252 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-02-18 11:07:10,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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) [2023-02-18 11:07:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-02-18 11:07:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 11:07:10,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:07:10,253 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] [2023-02-18 11:07:10,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 11:07:10,459 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 [2023-02-18 11:07:10,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:07:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:07:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2023-02-18 11:07:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:07:10,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613190005] [2023-02-18 11:07:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:07:10,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:07:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:07:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 11:07:10,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:07:10,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613190005] [2023-02-18 11:07:10,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613190005] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 11:07:10,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323543615] [2023-02-18 11:07:10,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 11:07:10,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:07:10,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:07:10,531 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) [2023-02-18 11:07:10,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 11:07:10,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 11:07:10,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 11:07:10,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 11:07:10,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 11:07:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 11:07:10,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 11:07:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 11:07:10,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323543615] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 11:07:10,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 11:07:10,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-18 11:07:10,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224494801] [2023-02-18 11:07:10,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 11:07:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 11:07:10,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:07:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 11:07:10,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-18 11:07:10,642 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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) [2023-02-18 11:07:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:07:10,714 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2023-02-18 11:07:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 11:07:10,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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) Word has length 27 [2023-02-18 11:07:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:07:10,715 INFO L225 Difference]: With dead ends: 57 [2023-02-18 11:07:10,716 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 11:07:10,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-18 11:07:10,717 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 11:07:10,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 11:07:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 11:07:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2023-02-18 11:07:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 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) [2023-02-18 11:07:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-02-18 11:07:10,722 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2023-02-18 11:07:10,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:07:10,722 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-02-18 11:07:10,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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) [2023-02-18 11:07:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-02-18 11:07:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 11:07:10,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:07:10,724 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-18 11:07:10,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 11:07:10,929 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 [2023-02-18 11:07:10,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:07:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:07:10,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2023-02-18 11:07:10,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:07:10,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177502134] [2023-02-18 11:07:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:07:10,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:07:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:07:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 11:07:12,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:07:12,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177502134] [2023-02-18 11:07:12,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177502134] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 11:07:12,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653140540] [2023-02-18 11:07:12,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 11:07:12,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:07:12,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:07:12,152 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) [2023-02-18 11:07:12,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 11:07:12,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 11:07:12,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 11:07:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-18 11:07:12,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 11:07:12,264 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 [2023-02-18 11:07:12,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 11:07:12,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2023-02-18 11:07:13,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 11:07:13,524 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 125 treesize of output 165 [2023-02-18 11:07:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 11:07:14,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 11:07:18,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 194 [2023-02-18 11:07:18,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 11:07:18,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 6156 treesize of output 5436