./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/loops-crafted-1/mono-crafted_13.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 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:28:52,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:28:52,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:28:52,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:28:52,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:28:52,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:28:52,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:28:52,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:28:52,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:28:52,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:28:52,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:28:52,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:28:52,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:28:52,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:28:52,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:28:52,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:28:52,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:28:52,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:28:52,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:28:52,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:28:52,559 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:28:52,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:28:52,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:28:52,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:28:52,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:28:52,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:28:52,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:28:52,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:28:52,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:28:52,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:28:52,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:28:52,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:28:52,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:28:52,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:28:52,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:28:52,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:28:52,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:28:52,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:28:52,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:28:52,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:28:52,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:28:52,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:28:52,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:28:52,610 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:28:52,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:28:52,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:28:52,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:28:52,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:28:52,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:28:52,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:28:52,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:28:52,613 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:28:52,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:28:52,614 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:28:52,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:28:52,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:28:52,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:28:52,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:28:52,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:28:52,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:28:52,615 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:28:52,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:28:52,616 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:28:52,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:28:52,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:28:52,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:28:52,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:28:52,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:28:52,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:28:52,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:28:52,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:28:52,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:28:52,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:28:52,618 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:28:52,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:28:52,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:28:52,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 [2022-07-22 15:28:52,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:28:52,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:28:52,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:28:52,894 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:28:52,894 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:28:52,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2022-07-22 15:28:52,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5637c5797/c013ec393fda4e2ca6868cad2c8cc5f4/FLAGa7a732c70 [2022-07-22 15:28:53,328 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:28:53,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2022-07-22 15:28:53,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5637c5797/c013ec393fda4e2ca6868cad2c8cc5f4/FLAGa7a732c70 [2022-07-22 15:28:53,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5637c5797/c013ec393fda4e2ca6868cad2c8cc5f4 [2022-07-22 15:28:53,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:28:53,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:28:53,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:28:53,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:28:53,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:28:53,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:53,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514374c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53, skipping insertion in model container [2022-07-22 15:28:53,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:53,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:28:53,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:28:53,940 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c[319,332] [2022-07-22 15:28:53,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:28:53,970 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:28:53,981 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c[319,332] [2022-07-22 15:28:53,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:28:53,998 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:28:53,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53 WrapperNode [2022-07-22 15:28:53,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:28:54,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:28:54,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:28:54,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:28:54,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,025 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-07-22 15:28:54,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:28:54,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:28:54,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:28:54,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:28:54,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:28:54,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:28:54,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:28:54,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:28:54,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (1/1) ... [2022-07-22 15:28:54,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:28:54,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:28:54,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 15:28:54,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 15:28:54,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:28:54,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:28:54,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:28:54,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:28:54,177 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:28:54,178 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:28:54,296 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:28:54,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:28:54,302 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 15:28:54,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:28:54 BoogieIcfgContainer [2022-07-22 15:28:54,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:28:54,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:28:54,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:28:54,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:28:54,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:28:53" (1/3) ... [2022-07-22 15:28:54,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aff5f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:28:54, skipping insertion in model container [2022-07-22 15:28:54,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:28:53" (2/3) ... [2022-07-22 15:28:54,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aff5f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:28:54, skipping insertion in model container [2022-07-22 15:28:54,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:28:54" (3/3) ... [2022-07-22 15:28:54,312 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2022-07-22 15:28:54,323 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:28:54,324 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:28:54,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:28:54,380 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@746a9292, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6b8c49bf [2022-07-22 15:28:54,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:28:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 15:28:54,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:54,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:54,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2022-07-22 15:28:54,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:54,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399639709] [2022-07-22 15:28:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:54,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:54,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399639709] [2022-07-22 15:28:54,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399639709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:28:54,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:28:54,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:28:54,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398710703] [2022-07-22 15:28:54,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:28:54,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:28:54,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:28:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:28:54,558 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:54,569 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-07-22 15:28:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:28:54,570 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-22 15:28:54,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:54,577 INFO L225 Difference]: With dead ends: 22 [2022-07-22 15:28:54,577 INFO L226 Difference]: Without dead ends: 9 [2022-07-22 15:28:54,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:28:54,582 INFO L413 NwaCegarLoop]: 15 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, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:54,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:28:54,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-22 15:28:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-22 15:28:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-07-22 15:28:54,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2022-07-22 15:28:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:54,613 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-07-22 15:28:54,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:54,614 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-07-22 15:28:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 15:28:54,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:54,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:54,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:28:54,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2022-07-22 15:28:54,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:54,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404012017] [2022-07-22 15:28:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:54,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:54,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404012017] [2022-07-22 15:28:54,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404012017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:28:54,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:28:54,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:28:54,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479740123] [2022-07-22 15:28:54,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:28:54,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 15:28:54,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 15:28:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:28:54,728 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:54,743 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-07-22 15:28:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 15:28:54,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-07-22 15:28:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:54,760 INFO L225 Difference]: With dead ends: 18 [2022-07-22 15:28:54,760 INFO L226 Difference]: Without dead ends: 11 [2022-07-22 15:28:54,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:28:54,761 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:54,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:28:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-22 15:28:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-22 15:28:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-07-22 15:28:54,765 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-07-22 15:28:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:54,766 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-07-22 15:28:54,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-07-22 15:28:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 15:28:54,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:54,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:54,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:28:54,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2022-07-22 15:28:54,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:54,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593670133] [2022-07-22 15:28:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:54,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:54,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593670133] [2022-07-22 15:28:54,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593670133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:28:54,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331219946] [2022-07-22 15:28:54,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:54,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:54,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:28:54,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:28:54,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:28:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 15:28:54,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:28:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:54,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:28:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:54,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331219946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:28:54,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:28:54,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 15:28:54,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407060761] [2022-07-22 15:28:54,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:28:54,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:28:54,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:54,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:28:54,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:28:54,964 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:55,001 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2022-07-22 15:28:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:28:55,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 15:28:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:55,011 INFO L225 Difference]: With dead ends: 22 [2022-07-22 15:28:55,011 INFO L226 Difference]: Without dead ends: 15 [2022-07-22 15:28:55,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:28:55,014 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:55,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:28:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-22 15:28:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-22 15:28:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-22 15:28:55,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-07-22 15:28:55,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:55,022 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-22 15:28:55,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-22 15:28:55,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 15:28:55,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:55,024 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:55,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:28:55,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:55,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash 571958019, now seen corresponding path program 1 times [2022-07-22 15:28:55,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:55,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172099001] [2022-07-22 15:28:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:55,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:55,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:55,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172099001] [2022-07-22 15:28:55,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172099001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:28:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410843632] [2022-07-22 15:28:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:55,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:28:55,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:28:55,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:28:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:55,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 15:28:55,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:28:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:55,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:28:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:55,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410843632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:28:55,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:28:55,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-22 15:28:55,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394518322] [2022-07-22 15:28:55,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:28:55,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 15:28:55,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:55,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 15:28:55,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:28:55,397 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2022-07-22 15:28:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:55,426 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-07-22 15:28:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 15:28:55,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 13 [2022-07-22 15:28:55,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:55,427 INFO L225 Difference]: With dead ends: 30 [2022-07-22 15:28:55,427 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 15:28:55,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:28:55,428 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:55,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:28:55,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 15:28:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-22 15:28:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-22 15:28:55,433 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2022-07-22 15:28:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-22 15:28:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2022-07-22 15:28:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-22 15:28:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 15:28:55,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:55,435 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:55,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 15:28:55,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 15:28:55,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash -870720137, now seen corresponding path program 2 times [2022-07-22 15:28:55,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:55,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293043307] [2022-07-22 15:28:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:55,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:55,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:55,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293043307] [2022-07-22 15:28:55,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293043307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:28:55,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29945124] [2022-07-22 15:28:55,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:28:55,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:55,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:28:55,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:28:55,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:28:55,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:28:55,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:28:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 15:28:55,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:28:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:55,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:28:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:56,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29945124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:28:56,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:28:56,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-22 15:28:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701600860] [2022-07-22 15:28:56,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:28:56,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 15:28:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 15:28:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-22 15:28:56,036 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:56,080 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-07-22 15:28:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 15:28:56,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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 21 [2022-07-22 15:28:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:56,081 INFO L225 Difference]: With dead ends: 46 [2022-07-22 15:28:56,082 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 15:28:56,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-22 15:28:56,083 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:56,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:28:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 15:28:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-22 15:28:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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) [2022-07-22 15:28:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-22 15:28:56,089 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2022-07-22 15:28:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:56,090 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-22 15:28:56,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-22 15:28:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 15:28:56,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:56,091 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:56,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 15:28:56,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:56,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash 114013791, now seen corresponding path program 3 times [2022-07-22 15:28:56,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:56,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004734078] [2022-07-22 15:28:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:56,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:56,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:56,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004734078] [2022-07-22 15:28:56,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004734078] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:28:56,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024088343] [2022-07-22 15:28:56,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:28:56,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:56,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:28:56,541 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) [2022-07-22 15:28:56,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:28:56,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 15:28:56,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:28:56,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 15:28:56,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:28:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-22 15:28:56,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:28:56,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024088343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:28:56,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:28:56,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2022-07-22 15:28:56,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291939046] [2022-07-22 15:28:56,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:28:56,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:28:56,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:56,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:28:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:28:56,764 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:56,777 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-07-22 15:28:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 15:28:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 37 [2022-07-22 15:28:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:56,778 INFO L225 Difference]: With dead ends: 46 [2022-07-22 15:28:56,779 INFO L226 Difference]: Without dead ends: 42 [2022-07-22 15:28:56,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:28:56,780 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:56,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:28:56,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-22 15:28:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-07-22 15:28:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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) [2022-07-22 15:28:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-22 15:28:56,786 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-07-22 15:28:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:56,786 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-22 15:28:56,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-22 15:28:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 15:28:56,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:56,788 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:56,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:28:57,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:57,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:57,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2048604129, now seen corresponding path program 1 times [2022-07-22 15:28:57,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:57,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134048925] [2022-07-22 15:28:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:57,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:28:57,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:57,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134048925] [2022-07-22 15:28:57,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134048925] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:28:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774713131] [2022-07-22 15:28:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:57,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:57,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:28:57,187 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) [2022-07-22 15:28:57,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:28:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:57,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 15:28:57,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:28:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:28:57,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:28:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:28:57,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774713131] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:28:57,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:28:57,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-22 15:28:57,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142918596] [2022-07-22 15:28:57,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:28:57,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 15:28:57,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:57,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 15:28:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 15:28:57,666 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:57,765 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2022-07-22 15:28:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 15:28:57,766 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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 39 [2022-07-22 15:28:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:57,767 INFO L225 Difference]: With dead ends: 82 [2022-07-22 15:28:57,767 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 15:28:57,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 15:28:57,768 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:57,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:28:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 15:28:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-22 15:28:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-07-22 15:28:57,778 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 39 [2022-07-22 15:28:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:57,778 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-07-22 15:28:57,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-07-22 15:28:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 15:28:57,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:57,780 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:57,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 15:28:58,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:58,002 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:58,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1608701423, now seen corresponding path program 2 times [2022-07-22 15:28:58,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:58,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995859318] [2022-07-22 15:28:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:58,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:28:58,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:58,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995859318] [2022-07-22 15:28:58,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995859318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:28:58,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619391995] [2022-07-22 15:28:58,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:28:58,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:58,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:28:58,499 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) [2022-07-22 15:28:58,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 15:28:58,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:28:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:28:58,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 15:28:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:28:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:28:58,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:28:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:28:59,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619391995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:28:59,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:28:59,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-07-22 15:28:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330139657] [2022-07-22 15:28:59,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:28:59,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 15:28:59,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:59,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 15:28:59,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 15:28:59,755 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:59,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:59,951 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2022-07-22 15:28:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 15:28:59,952 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 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 71 [2022-07-22 15:28:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:59,953 INFO L225 Difference]: With dead ends: 146 [2022-07-22 15:28:59,953 INFO L226 Difference]: Without dead ends: 136 [2022-07-22 15:28:59,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 15:28:59,956 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:59,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:28:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-22 15:28:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-07-22 15:28:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-07-22 15:28:59,970 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 71 [2022-07-22 15:28:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:59,970 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-07-22 15:28:59,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-07-22 15:28:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 15:28:59,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:59,973 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:59,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 15:29:00,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:29:00,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:29:00,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:29:00,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1000525425, now seen corresponding path program 3 times [2022-07-22 15:29:00,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:29:00,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119316588] [2022-07-22 15:29:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:29:00,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:29:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:29:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:29:01,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:29:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119316588] [2022-07-22 15:29:01,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119316588] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:29:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729675343] [2022-07-22 15:29:01,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:29:01,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:29:01,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:29:01,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:29:01,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 15:29:01,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 15:29:01,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:29:01,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 15:29:01,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:29:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-07-22 15:29:02,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:29:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-07-22 15:29:02,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729675343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:29:02,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:29:02,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 5, 5] total 71 [2022-07-22 15:29:02,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385303550] [2022-07-22 15:29:02,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:29:02,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-22 15:29:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:29:02,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-22 15:29:02,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=2863, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 15:29:02,379 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:29:04,383 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2022-07-22 15:29:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-22 15:29:04,384 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 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 135 [2022-07-22 15:29:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:29:04,385 INFO L225 Difference]: With dead ends: 154 [2022-07-22 15:29:04,385 INFO L226 Difference]: Without dead ends: 144 [2022-07-22 15:29:04,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6454, Invalid=11368, Unknown=0, NotChecked=0, Total=17822 [2022-07-22 15:29:04,392 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:29:04,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:29:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-22 15:29:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2022-07-22 15:29:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-07-22 15:29:04,403 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2022-07-22 15:29:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:29:04,403 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-07-22 15:29:04,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-07-22 15:29:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-22 15:29:04,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:29:04,405 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:29:04,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 15:29:04,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:29:04,615 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:29:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:29:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1372821556, now seen corresponding path program 4 times [2022-07-22 15:29:04,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:29:04,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325071693] [2022-07-22 15:29:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:29:04,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:29:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:29:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:29:06,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:29:06,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325071693] [2022-07-22 15:29:06,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325071693] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:29:06,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677915026] [2022-07-22 15:29:06,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:29:06,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:29:06,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:29:06,092 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:29:06,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 15:29:06,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:29:06,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:29:06,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-22 15:29:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:29:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:29:06,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:29:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:29:10,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677915026] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:29:10,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:29:10,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2022-07-22 15:29:10,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019762916] [2022-07-22 15:29:10,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:29:10,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-07-22 15:29:10,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:29:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-07-22 15:29:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-07-22 15:29:10,234 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:29:10,595 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2022-07-22 15:29:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-07-22 15:29:10,596 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 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 141 [2022-07-22 15:29:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:29:10,597 INFO L225 Difference]: With dead ends: 286 [2022-07-22 15:29:10,597 INFO L226 Difference]: Without dead ends: 272 [2022-07-22 15:29:10,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-07-22 15:29:10,601 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:29:10,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:29:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-22 15:29:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-07-22 15:29:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 274 transitions. [2022-07-22 15:29:10,620 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 274 transitions. Word has length 141 [2022-07-22 15:29:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:29:10,620 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 274 transitions. [2022-07-22 15:29:10,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 274 transitions. [2022-07-22 15:29:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-07-22 15:29:10,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:29:10,624 INFO L195 NwaCegarLoop]: trace histogram [129, 128, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:29:10,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 15:29:10,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 15:29:10,847 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:29:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:29:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2118041225, now seen corresponding path program 5 times [2022-07-22 15:29:10,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:29:10,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840412525] [2022-07-22 15:29:10,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:29:10,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:29:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:29:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:29:16,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:29:16,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840412525] [2022-07-22 15:29:16,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840412525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:29:16,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545602179] [2022-07-22 15:29:16,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:29:16,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:29:16,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:29:16,183 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:29:16,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 15:29:16,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2022-07-22 15:29:16,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:29:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 130 conjunts are in the unsatisfiable core [2022-07-22 15:29:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:29:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:29:16,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:29:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:29:31,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545602179] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:29:31,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:29:31,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2022-07-22 15:29:31,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003437361] [2022-07-22 15:29:31,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:29:31,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2022-07-22 15:29:31,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:29:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2022-07-22 15:29:31,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-07-22 15:29:31,974 INFO L87 Difference]: Start difference. First operand 272 states and 274 transitions. Second operand has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:29:32,925 INFO L93 Difference]: Finished difference Result 546 states and 680 transitions. [2022-07-22 15:29:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-07-22 15:29:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 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 271 [2022-07-22 15:29:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:29:32,928 INFO L225 Difference]: With dead ends: 546 [2022-07-22 15:29:32,928 INFO L226 Difference]: Without dead ends: 532 [2022-07-22 15:29:32,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-07-22 15:29:32,932 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:29:32,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:29:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-22 15:29:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2022-07-22 15:29:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.0056497175141244) internal successors, (534), 531 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 534 transitions. [2022-07-22 15:29:32,958 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 534 transitions. Word has length 271 [2022-07-22 15:29:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:29:32,959 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 534 transitions. [2022-07-22 15:29:32,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 534 transitions. [2022-07-22 15:29:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-07-22 15:29:32,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:29:32,968 INFO L195 NwaCegarLoop]: trace histogram [259, 258, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:29:32,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 15:29:33,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:29:33,183 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:29:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:29:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1610521155, now seen corresponding path program 6 times [2022-07-22 15:29:33,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:29:33,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842264807] [2022-07-22 15:29:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:29:33,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:29:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:29:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 259 proven. 66822 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:29:53,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:29:53,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842264807] [2022-07-22 15:29:53,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842264807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:29:53,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672744294] [2022-07-22 15:29:53,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:29:53,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:29:53,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:29:53,624 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:29:53,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 15:29:53,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 15:29:53,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:29:53,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 15:29:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:29:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2022-07-22 15:29:54,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:29:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2022-07-22 15:29:54,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672744294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:29:54,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:29:54,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [261, 4, 4] total 265 [2022-07-22 15:29:54,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388237209] [2022-07-22 15:29:54,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:29:54,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2022-07-22 15:29:54,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:29:54,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2022-07-22 15:29:54,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2022-07-22 15:29:54,434 INFO L87 Difference]: Start difference. First operand 532 states and 534 transitions. Second operand has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:29:55,619 INFO L93 Difference]: Finished difference Result 554 states and 565 transitions. [2022-07-22 15:29:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2022-07-22 15:29:55,619 INFO L78 Accepts]: Start accepts. Automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 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 531 [2022-07-22 15:29:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:29:55,623 INFO L225 Difference]: With dead ends: 554 [2022-07-22 15:29:55,623 INFO L226 Difference]: Without dead ends: 540 [2022-07-22 15:29:55,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1058 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2022-07-22 15:29:55,627 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 524 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:29:55,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 28 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 15:29:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-07-22 15:29:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-07-22 15:29:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.0111317254174397) internal successors, (545), 539 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 545 transitions. [2022-07-22 15:29:55,651 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 545 transitions. Word has length 531 [2022-07-22 15:29:55,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:29:55,652 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 545 transitions. [2022-07-22 15:29:55,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:29:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 545 transitions. [2022-07-22 15:29:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-07-22 15:29:55,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:29:55,662 INFO L195 NwaCegarLoop]: trace histogram [263, 259, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:29:55,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 15:29:55,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 15:29:55,885 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:29:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:29:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2107211535, now seen corresponding path program 7 times [2022-07-22 15:29:55,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:29:55,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051657557] [2022-07-22 15:29:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:29:55,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:29:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:30:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 15:30:16,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:30:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051657557] [2022-07-22 15:30:16,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051657557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:30:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308760718] [2022-07-22 15:30:16,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:30:16,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:30:16,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:30:16,449 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:30:16,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 15:30:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:30:16,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 261 conjunts are in the unsatisfiable core [2022-07-22 15:30:16,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:30:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 15:30:17,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:31:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 15:31:18,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308760718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:31:18,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:31:18,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [262, 262, 262] total 523 [2022-07-22 15:31:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876663844] [2022-07-22 15:31:18,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:31:18,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 523 states [2022-07-22 15:31:18,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:31:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 523 interpolants. [2022-07-22 15:31:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136503, Invalid=136503, Unknown=0, NotChecked=0, Total=273006 [2022-07-22 15:31:18,897 INFO L87 Difference]: Start difference. First operand 540 states and 545 transitions. Second operand has 523 states, 523 states have (on average 2.0152963671128106) internal successors, (1054), 523 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:31:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:31:22,933 INFO L93 Difference]: Finished difference Result 1082 states and 1353 transitions. [2022-07-22 15:31:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 522 states. [2022-07-22 15:31:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 523 states, 523 states have (on average 2.0152963671128106) internal successors, (1054), 523 states have internal predecessors, (1054), 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 539 [2022-07-22 15:31:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:31:22,938 INFO L225 Difference]: With dead ends: 1082 [2022-07-22 15:31:22,938 INFO L226 Difference]: Without dead ends: 1062 [2022-07-22 15:31:22,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 817 SyntacticMatches, 0 SemanticMatches, 521 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 80.9s TimeCoverageRelationStatistics Valid=136503, Invalid=136503, Unknown=0, NotChecked=0, Total=273006 [2022-07-22 15:31:22,952 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 15:31:22,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 15:31:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-07-22 15:31:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1062. [2022-07-22 15:31:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.0056550424128181) internal successors, (1067), 1061 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:31:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1067 transitions. [2022-07-22 15:31:22,998 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1067 transitions. Word has length 539 [2022-07-22 15:31:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:31:22,999 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1067 transitions. [2022-07-22 15:31:23,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 523 states, 523 states have (on average 2.0152963671128106) internal successors, (1054), 523 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:31:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1067 transitions. [2022-07-22 15:31:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2022-07-22 15:31:23,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:31:23,007 INFO L195 NwaCegarLoop]: trace histogram [524, 520, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:31:23,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 15:31:23,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 15:31:23,208 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:31:23,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:31:23,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1707818718, now seen corresponding path program 8 times [2022-07-22 15:31:23,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:31:23,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383091571] [2022-07-22 15:31:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:31:23,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:31:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat