./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const5.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 e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:32:48,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:32:48,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:32:48,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:32:48,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:32:48,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:32:48,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:32:48,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:32:48,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:32:48,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:32:48,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:32:48,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:32:48,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:32:48,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:32:48,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:32:48,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:32:48,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:32:48,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:32:48,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:32:48,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:32:48,571 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:32:48,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:32:48,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:32:48,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:32:48,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:32:48,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:32:48,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:32:48,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:32:48,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:32:48,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:32:48,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:32:48,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:32:48,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:32:48,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:32:48,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:32:48,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:32:48,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:32:48,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:32:48,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:32:48,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:32:48,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:32:48,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:32:48,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:32:48,620 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:32:48,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:32:48,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:32:48,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:32:48,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:32:48,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:32:48,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:32:48,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:32:48,623 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:32:48,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:32:48,623 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:32:48,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:32:48,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:32:48,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:32:48,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:32:48,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:32:48,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:32:48,639 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:32:48,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:32:48,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:32:48,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:32:48,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:32:48,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:32:48,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:32:48,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:32:48,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:32:48,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:32:48,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:32:48,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:32:48,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:32:48,642 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:32:48,642 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:32:48,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:32:48,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2022-07-20 21:32:48,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:32:48,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:32:48,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:32:48,881 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:32:48,882 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:32:48,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-07-20 21:32:48,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a11e666b4/e605e0eb5c7f4d449f2db667f3d745ea/FLAG9a203be82 [2022-07-20 21:32:49,293 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:32:49,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-07-20 21:32:49,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a11e666b4/e605e0eb5c7f4d449f2db667f3d745ea/FLAG9a203be82 [2022-07-20 21:32:49,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a11e666b4/e605e0eb5c7f4d449f2db667f3d745ea [2022-07-20 21:32:49,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:32:49,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:32:49,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:32:49,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:32:49,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:32:49,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:32:49" (1/1) ... [2022-07-20 21:32:49,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb7e573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:49, skipping insertion in model container [2022-07-20 21:32:49,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:32:49" (1/1) ... [2022-07-20 21:32:49,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:32:49,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:32:49,945 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-07-20 21:32:49,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:32:50,000 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:32:50,020 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-07-20 21:32:50,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:32:50,058 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:32:50,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50 WrapperNode [2022-07-20 21:32:50,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:32:50,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:32:50,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:32:50,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:32:50,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,096 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2022-07-20 21:32:50,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:32:50,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:32:50,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:32:50,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:32:50,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:32:50,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:32:50,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:32:50,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:32:50,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (1/1) ... [2022-07-20 21:32:50,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:32:50,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:50,158 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) [2022-07-20 21:32:50,174 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 [2022-07-20 21:32:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:32:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:32:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:32:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 21:32:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:32:50,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:32:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:32:50,249 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:32:50,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:32:50,452 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:32:50,457 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:32:50,464 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-20 21:32:50,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:32:50 BoogieIcfgContainer [2022-07-20 21:32:50,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:32:50,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:32:50,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:32:50,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:32:50,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:32:49" (1/3) ... [2022-07-20 21:32:50,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5884cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:32:50, skipping insertion in model container [2022-07-20 21:32:50,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:32:50" (2/3) ... [2022-07-20 21:32:50,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5884cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:32:50, skipping insertion in model container [2022-07-20 21:32:50,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:32:50" (3/3) ... [2022-07-20 21:32:50,483 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2022-07-20 21:32:50,507 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:32:50,507 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:32:50,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:32:50,582 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@2e117cac, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@17be9ae9 [2022-07-20 21:32:50,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:32:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 21:32:50,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:50,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:50,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:50,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:50,599 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2022-07-20 21:32:50,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:50,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828724670] [2022-07-20 21:32:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:50,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:32:50,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:50,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828724670] [2022-07-20 21:32:50,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828724670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:32:50,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:32:50,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:32:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404541585] [2022-07-20 21:32:50,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:32:50,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:32:50,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:50,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:32:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:32:50,798 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:50,828 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2022-07-20 21:32:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:32:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 21:32:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:50,839 INFO L225 Difference]: With dead ends: 83 [2022-07-20 21:32:50,839 INFO L226 Difference]: Without dead ends: 39 [2022-07-20 21:32:50,843 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 [2022-07-20 21:32:50,850 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:50,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:32:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-20 21:32:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-20 21:32:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-07-20 21:32:50,887 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2022-07-20 21:32:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:50,888 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-07-20 21:32:50,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-07-20 21:32:50,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 21:32:50,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:50,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:50,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:32:50,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:50,893 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2022-07-20 21:32:50,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:50,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99666886] [2022-07-20 21:32:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:50,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:32:51,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:51,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99666886] [2022-07-20 21:32:51,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99666886] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:32:51,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:32:51,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:32:51,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408645560] [2022-07-20 21:32:51,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:32:51,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:32:51,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:51,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:32:51,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:32:51,016 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:51,116 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-07-20 21:32:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:32:51,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 21:32:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:51,118 INFO L225 Difference]: With dead ends: 75 [2022-07-20 21:32:51,119 INFO L226 Difference]: Without dead ends: 41 [2022-07-20 21:32:51,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:32:51,121 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:51,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-20 21:32:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-07-20 21:32:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-07-20 21:32:51,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2022-07-20 21:32:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:51,136 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-07-20 21:32:51,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-07-20 21:32:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 21:32:51,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:51,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:51,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:32:51,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:51,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:51,144 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2022-07-20 21:32:51,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:51,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005886601] [2022-07-20 21:32:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:51,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:32:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005886601] [2022-07-20 21:32:51,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005886601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:32:51,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:32:51,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:32:51,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036929869] [2022-07-20 21:32:51,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:32:51,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:32:51,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:32:51,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:32:51,204 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:51,356 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2022-07-20 21:32:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:32:51,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-20 21:32:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:51,358 INFO L225 Difference]: With dead ends: 92 [2022-07-20 21:32:51,359 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 21:32:51,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:32:51,366 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:51,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 21:32:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-07-20 21:32:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-20 21:32:51,382 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2022-07-20 21:32:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:51,382 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-20 21:32:51,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-20 21:32:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 21:32:51,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:51,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:51,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 21:32:51,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:51,391 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2022-07-20 21:32:51,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:51,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796244681] [2022-07-20 21:32:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:51,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 21:32:51,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:51,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796244681] [2022-07-20 21:32:51,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796244681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:51,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364279256] [2022-07-20 21:32:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:51,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:51,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:51,512 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) [2022-07-20 21:32:51,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:32:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:51,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:32:51,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 21:32:51,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 21:32:51,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364279256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:51,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:51,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 21:32:51,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759998827] [2022-07-20 21:32:51,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:51,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 21:32:51,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:51,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 21:32:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:32:51,682 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:51,818 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2022-07-20 21:32:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 21:32:51,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-20 21:32:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:51,819 INFO L225 Difference]: With dead ends: 97 [2022-07-20 21:32:51,819 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 21:32:51,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:32:51,828 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:51,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:51,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 21:32:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-07-20 21:32:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-07-20 21:32:51,839 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2022-07-20 21:32:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:51,839 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-07-20 21:32:51,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-07-20 21:32:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 21:32:51,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:51,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:51,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 21:32:52,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:52,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2022-07-20 21:32:52,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:52,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269657628] [2022-07-20 21:32:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:52,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 21:32:52,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:52,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269657628] [2022-07-20 21:32:52,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269657628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:52,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763453163] [2022-07-20 21:32:52,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:32:52,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:52,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:52,164 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) [2022-07-20 21:32:52,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:32:52,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:32:52,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:52,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:32:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 21:32:52,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 21:32:52,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763453163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:52,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:52,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-20 21:32:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114585348] [2022-07-20 21:32:52,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:52,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:32:52,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:32:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:32:52,427 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:52,621 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2022-07-20 21:32:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 21:32:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-20 21:32:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:52,625 INFO L225 Difference]: With dead ends: 123 [2022-07-20 21:32:52,625 INFO L226 Difference]: Without dead ends: 83 [2022-07-20 21:32:52,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:32:52,626 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:52,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 22 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:32:52,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-20 21:32:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-07-20 21:32:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-07-20 21:32:52,647 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2022-07-20 21:32:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:52,648 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-07-20 21:32:52,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-07-20 21:32:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-20 21:32:52,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:52,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:52,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:52,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:52,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2022-07-20 21:32:52,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:52,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912158227] [2022-07-20 21:32:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:52,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:32:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912158227] [2022-07-20 21:32:54,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912158227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449467663] [2022-07-20 21:32:54,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:32:54,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:54,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:54,572 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) [2022-07-20 21:32:54,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:32:54,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:32:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:54,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-20 21:32:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:54,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:32:54,809 INFO L356 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-07-20 21:32:54,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-07-20 21:32:57,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:32:57,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:57,207 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:32:57,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 15 [2022-07-20 21:32:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:32:57,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:31,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-07-20 21:33:31,736 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:33:31,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 467 treesize of output 441 [2022-07-20 21:33:32,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-07-20 21:33:32,191 INFO L356 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2022-07-20 21:33:32,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 452 [2022-07-20 21:33:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:33:34,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449467663] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:34,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:34,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32, 34] total 77 [2022-07-20 21:33:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78522775] [2022-07-20 21:33:34,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:34,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-20 21:33:34,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:34,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-20 21:33:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=5357, Unknown=13, NotChecked=0, Total=5852 [2022-07-20 21:33:34,864 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 77 states, 77 states have (on average 2.6103896103896105) internal successors, (201), 77 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:33:55,015 INFO L93 Difference]: Finished difference Result 202 states and 233 transitions. [2022-07-20 21:33:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-20 21:33:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.6103896103896105) internal successors, (201), 77 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-20 21:33:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:33:55,019 INFO L225 Difference]: With dead ends: 202 [2022-07-20 21:33:55,019 INFO L226 Difference]: Without dead ends: 198 [2022-07-20 21:33:55,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 92 SyntacticMatches, 47 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 5534 ImplicationChecksByTransitivity, 53.1s TimeCoverageRelationStatistics Valid=1142, Invalid=11717, Unknown=23, NotChecked=0, Total=12882 [2022-07-20 21:33:55,024 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2319 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:33:55,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 224 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 869 Invalid, 0 Unknown, 2319 Unchecked, 0.5s Time] [2022-07-20 21:33:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-20 21:33:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 135. [2022-07-20 21:33:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.171641791044776) internal successors, (157), 134 states have internal predecessors, (157), 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) [2022-07-20 21:33:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2022-07-20 21:33:55,047 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 71 [2022-07-20 21:33:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:33:55,048 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2022-07-20 21:33:55,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.6103896103896105) internal successors, (201), 77 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2022-07-20 21:33:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 21:33:55,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:33:55,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:33:55,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:33:55,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:55,273 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:33:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:33:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2022-07-20 21:33:55,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:33:55,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880404040] [2022-07-20 21:33:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:33:55,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:33:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:33:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:33:55,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:33:55,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880404040] [2022-07-20 21:33:55,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880404040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:33:55,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386674611] [2022-07-20 21:33:55,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:33:55,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:55,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:33:55,364 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) [2022-07-20 21:33:55,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:33:55,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:33:55,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:33:55,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:33:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:33:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:33:55,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:33:55,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386674611] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:55,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:55,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 21:33:55,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714544634] [2022-07-20 21:33:55,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:55,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:33:55,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:33:55,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:33:55,573 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:33:55,898 INFO L93 Difference]: Finished difference Result 305 states and 354 transitions. [2022-07-20 21:33:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:33:55,898 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-20 21:33:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:33:55,899 INFO L225 Difference]: With dead ends: 305 [2022-07-20 21:33:55,899 INFO L226 Difference]: Without dead ends: 184 [2022-07-20 21:33:55,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:33:55,901 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 187 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:33:55,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 46 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:33:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-20 21:33:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 156. [2022-07-20 21:33:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1419354838709677) internal successors, (177), 155 states have internal predecessors, (177), 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) [2022-07-20 21:33:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2022-07-20 21:33:55,912 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 73 [2022-07-20 21:33:55,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:33:55,912 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2022-07-20 21:33:55,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2022-07-20 21:33:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 21:33:55,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:33:55,914 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:33:55,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:33:56,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:56,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:33:56,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:33:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2022-07-20 21:33:56,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:33:56,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472832293] [2022-07-20 21:33:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:33:56,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:33:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:33:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-20 21:33:56,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:33:56,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472832293] [2022-07-20 21:33:56,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472832293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:33:56,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114893557] [2022-07-20 21:33:56,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:33:56,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:56,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:33:56,216 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) [2022-07-20 21:33:56,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:33:56,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 21:33:56,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:33:56,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:33:56,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:33:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-20 21:33:56,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-20 21:33:56,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114893557] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:56,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:56,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 21:33:56,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641796856] [2022-07-20 21:33:56,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:56,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:33:56,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:33:56,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:33:56,550 INFO L87 Difference]: Start difference. First operand 156 states and 177 transitions. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 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) [2022-07-20 21:33:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:33:56,877 INFO L93 Difference]: Finished difference Result 172 states and 193 transitions. [2022-07-20 21:33:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 21:33:56,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 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 75 [2022-07-20 21:33:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:33:56,879 INFO L225 Difference]: With dead ends: 172 [2022-07-20 21:33:56,879 INFO L226 Difference]: Without dead ends: 114 [2022-07-20 21:33:56,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:33:56,880 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 164 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:33:56,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 32 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:33:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-20 21:33:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2022-07-20 21:33:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 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) [2022-07-20 21:33:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2022-07-20 21:33:56,887 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2022-07-20 21:33:56,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:33:56,887 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2022-07-20 21:33:56,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 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) [2022-07-20 21:33:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2022-07-20 21:33:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 21:33:56,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:33:56,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:33:56,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 21:33:57,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:57,099 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:33:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:33:57,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2022-07-20 21:33:57,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:33:57,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764473184] [2022-07-20 21:33:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:33:57,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:33:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:34:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:34:01,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:34:01,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764473184] [2022-07-20 21:34:01,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764473184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:34:01,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366382168] [2022-07-20 21:34:01,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:34:01,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:34:01,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:34:01,392 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) [2022-07-20 21:34:01,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:34:01,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-20 21:34:01,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:34:01,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-20 21:34:01,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:34:01,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:34:01,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:01,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-20 21:34:08,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:08,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:34:08,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:34:08,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:08,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:08,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:34:08,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:34:08,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:34:08,711 INFO L356 Elim1Store]: treesize reduction 12, result has 57.1 percent of original size [2022-07-20 21:34:08,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 37 [2022-07-20 21:34:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:34:08,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:36:54,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2022-07-20 21:36:54,280 INFO L356 Elim1Store]: treesize reduction 57, result has 35.2 percent of original size [2022-07-20 21:36:54,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70100 treesize of output 59378